u blox TOBYL200 GSM/UMTS/LTE Data Module User Manual TOBY L2 series

u-blox AG GSM/UMTS/LTE Data Module TOBY L2 series

System Integration Manual

    TOBY-L2 and MPCI-L2 series LTE/DC-HSPA+/EGPRS modules System Integration Manual               Abstract This  document  describes  the  features  and  the  system  integration  of TOBY-L2 and MPCI-L2 series multi-mode cellular modules. These modules are a complete and cost  efficient  LTE/3G/2G  solution offering  up  to  150  Mb/s  download  and  50  Mb/s  upload  data  rates, covering  up  to  six  LTE  bands,  up  to  five  WCDMA/DC-HSPA+  bands and four GSM/EGPRS bands in the compact TOBY LGA form factor of TOBY-L2  modules  or  in  the  industry standard  PCI  Express Mini  Card form factor of MPCI-L2 modules. TOBY-L2 series  www.u-blox.com UBX-13004618 - R04 MPCI-L2 series
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04         Page 2 of 141  Document Information Title TOBY-L2 and MPCI-L2 series Subtitle LTE/DC-HSPA+/EGPRS modules  Document type System Integration Manual  Document number UBX-13004618 Revision and date R04 30-Sep-2014 Document status Advance Information  Document status explanation Objective Specification Document contains target values. Revised and supplementary data will be published later. Advance Information Document contains data based on early testing. Revised and supplementary data will be published later. Early Production Information Document contains data from product verification. Revised and supplementary data may be published later. Production Information Document contains the final product specification.  This document applies to the following products: Name Type number Firmware version PCN / IN TOBY-L200 TOBY-L200-00S-00 09.40 UBX-14040967 TOBY-L210 TOBY-L210-00S-00 09.40 UBX-14040967 MPCI-L200 MPCI-L200-00S-00 09.34 UBX-14040967 MPCI-L210 MPCI-L210-00S-00 09.34 UBX-14040967              u-blox reserves all rights to this document and the information contained herein. Products, names, logos and designs described herein may in whole or in part be subject to intellectual property rights. Reproduction, use, modification or disclosure to third parties of this document or any part thereof without the express permission of u-blox is strictly prohibited. The  information contained  herein  is  provided “as is”  and  u-blox assumes no  liability  for  the  use  of  the  information. No  warranty,  either express or implied, is given, including but not limited, with respect to the accuracy, correctness, reliability and fitness for a particular purpose of the information. This document may be revised by u-blox at any time. For most recent documents, please visit www.u-blox.com. Copyright © 2014, u-blox AG u-blox® is a registered trademark of u-blox Holding AG in the EU and other countries. PCI, PCI Express, PCIe, and PCI-SIG are trademarks or registered trademarks of PCI-SIG. Microsoft and  Windows are either registered trademarks or  trademarks of Microsoft Corporation in the United States and/or other countries.  ARM®  is a  registered trademark of ARM Limited  in  the EU and other countries.  All  other registered trademarks or trademarks mentioned in this document are property of their respective owners.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Preface     Page 3 of 141 Preface u-blox Technical Documentation As  part  of  our  commitment  to  customer  support,  u-blox  maintains  an  extensive  volume  of  technical documentation for our products. In addition to our product-specific technical data sheets, the following manuals are available to assist u-blox customers in product design and development.  AT  Commands  Manual:  This  document  provides  the  description of  the  AT  commands supported  by  the  u-blox cellular modules.  System  Integration  Manual:  This  document  provides  the  description  of  u-blox  cellular  modules’  system from the hardware and the software point of view, it provides hardware design guidelines for the optimal integration of the cellular modules in the application device and it provides information on how to set up production and final product tests on application devices integrating the cellular modules.  Application  Note:  These  documents  provide  guidelines  and  information  on  specific  hardware  and/or software topics on u-blox cellular modules. See Related documents for a list of Application Notes related to your Cellular Module.  How to use this Manual The TOBY-L2 and MPCI-L2 series System Integration Manual provides the necessary information to successfully design and configure the u-blox cellular modules. This manual has a modular structure. It is not necessary to read it from the beginning to the end. The following symbols are used to highlight important information within the manual:  An index finger points out key information pertaining to module integration and performance.  A warning symbol indicates actions that could negatively impact or damage the module.  Questions If you have any questions about u-blox Cellular Integration:  Read this manual carefully.  Contact our information service on the homepage http://www.u-blox.com/  Technical Support Worldwide Web Our website (http://www.u-blox.com/)  is a rich pool of  information. Product  information,  technical documents can be accessed 24h a day. By E-mail Contact  the  closest  Technical  Support  office  by  email.  Use  our  service  pool  email  addresses  rather  than  any personal email address of our staff. This makes sure that your request is processed as soon as possible. You will find the contact details at the end of the document. Helpful Information when Contacting Technical Support When contacting Technical Support, have the following information ready:  Module type (TOBY-L200) and firmware version  Module configuration  Clear description of your question or the problem  A short description of the application  Your complete contact details
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Contents     Page 4 of 141 Contents Preface ................................................................................................................................ 3 Contents .............................................................................................................................. 4 1 System description ....................................................................................................... 8 1.1 Overview .............................................................................................................................................. 8 1.2 Architecture ........................................................................................................................................ 10 1.2.1 Internal blocks ............................................................................................................................. 11 1.3 Pin-out ............................................................................................................................................... 12 1.3.1 TOBY-L2 series pin assignment .................................................................................................... 12 1.3.2 MPCI-L2 series pin assignment .................................................................................................... 16 1.4 Operating modes ................................................................................................................................ 18 1.5 Supply interfaces ................................................................................................................................ 20 1.5.1 Module supply input (VCC or 3.3Vaux) ....................................................................................... 20 1.5.2 RTC supply input/output (V_BCKP) .............................................................................................. 27 1.5.3 Generic digital interfaces supply output (V_INT) ........................................................................... 28 1.6 System function interfaces .................................................................................................................. 29 1.6.1 Module power-on ....................................................................................................................... 29 1.6.2 Module power-off ....................................................................................................................... 31 1.6.3 Module reset ............................................................................................................................... 33 1.6.4 Module configuration selection by host processor ....................................................................... 33 1.7 Antenna interface ............................................................................................................................... 34 1.7.1 Antenna RF interfaces (ANT1 / ANT2) .......................................................................................... 34 1.7.2 Antenna detection interface (ANT_DET) ...................................................................................... 37 1.8 SIM interface ...................................................................................................................................... 37 1.8.1 SIM interface ............................................................................................................................... 37 1.8.2 SIM detection interface ............................................................................................................... 37 1.9 Data communication interfaces .......................................................................................................... 38 1.9.1 Universal Serial Bus (USB) ............................................................................................................ 38 1.9.2 Asynchronous serial interface (UART)........................................................................................... 42 1.9.3 DDC (I2C) interface ...................................................................................................................... 44 1.9.4 Secure Digital Input Output interface (SDIO) ................................................................................ 45 1.10 Audio .............................................................................................................................................. 45 1.10.1 Digital audio over I2S interface ..................................................................................................... 45 1.11 General Purpose Input/Output ........................................................................................................ 46 1.12 Mini PCIe specific signals (W_DISABLE#, LED_WWAN#) .................................................................. 47 1.13 Reserved pins (RSVD) ...................................................................................................................... 47 1.14 Not connected pins (NC) ................................................................................................................. 47 1.15 System features............................................................................................................................... 48 1.15.1 Network indication ...................................................................................................................... 48 1.15.2 Antenna supervisor ..................................................................................................................... 48
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Contents     Page 5 of 141 1.15.3 Jamming detection ...................................................................................................................... 48 1.15.4 IP modes of operation ................................................................................................................. 49 1.15.5 Dual stack IPv4/IPv6 ..................................................................................................................... 49 1.15.6 TCP/IP and UDP/IP ....................................................................................................................... 49 1.15.7 FTP and FTPS ............................................................................................................................... 49 1.15.8 HTTP and HTTPS .......................................................................................................................... 50 1.15.9 SSL .............................................................................................................................................. 50 1.15.10 AssistNow clients and GNSS integration ................................................................................... 50 1.15.11 Hybrid positioning and CellLocate® .......................................................................................... 50 1.15.12 Firmware update Over AT (FOAT)............................................................................................. 53 1.15.13 Firmware update Over The Air (FOTA) ...................................................................................... 53 1.15.14 In-band Modem (eCall / ERA-GLONASS) .................................................................................. 54 1.15.15 SIM Access Profile (SAP) ........................................................................................................... 54 1.15.16 Smart temperature management ............................................................................................. 56 1.15.17 Power saving ........................................................................................................................... 58 2 Design-in ..................................................................................................................... 59 2.1 Overview ............................................................................................................................................ 59 2.2 Supply interfaces ................................................................................................................................ 60 2.2.1 Module supply (VCC or 3.3Vaux)................................................................................................. 60 2.2.2 RTC supply output (V_BCKP) ....................................................................................................... 72 2.2.3 Generic digital interfaces supply output (V_INT) ........................................................................... 74 2.3 System functions interfaces ................................................................................................................ 75 2.3.1 Module power-on (PWR_ON) ...................................................................................................... 75 2.3.2 Module reset (RESET_N or PERST#) .............................................................................................. 76 2.3.3 Module configuration selection by host processor ....................................................................... 77 2.4 Antenna interface ............................................................................................................................... 78 2.4.1 Antenna RF interfaces (ANT1 / ANT2) .......................................................................................... 78 2.4.2 Antenna detection interface (ANT_DET) ...................................................................................... 86 2.5 SIM interface ...................................................................................................................................... 88 2.5.1 Guidelines for SIM circuit design.................................................................................................. 88 2.5.2 Guidelines for SIM layout design ................................................................................................. 94 2.6 Data communication interfaces .......................................................................................................... 95 2.6.1 Universal Serial Bus (USB) ............................................................................................................ 95 2.6.2 Asynchronous serial interface (UART)........................................................................................... 97 2.6.3 DDC (I2C) interface .................................................................................................................... 101 2.6.4 Secure Digital Input Output interface (SDIO) .............................................................................. 105 2.7 Audio interface ................................................................................................................................. 106 2.7.1 Digital audio interface ............................................................................................................... 106 2.8 General Purpose Input/Output .......................................................................................................... 108 2.9 Mini PCIe specific signals (W_DISABLE#, LED_WWAN#) .................................................................... 109 2.10 Reserved pins (RSVD) .................................................................................................................... 110 2.11 Module placement ........................................................................................................................ 111 2.12 TOBY-L2 series module footprint and paste mask ......................................................................... 112
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Contents     Page 6 of 141 2.13 MPCI-L2 series module installation ................................................................................................ 113 2.14 Thermal guidelines ........................................................................................................................ 115 2.15 ESD guidelines .............................................................................................................................. 116 2.15.1 ESD immunity test overview ...................................................................................................... 116 2.15.2 ESD immunity test of TOBY-L2 and MPCI-L2 series reference designs ........................................ 117 2.15.3 ESD application circuits .............................................................................................................. 117 2.16 Schematic for TOBY-L2 and MPCI-L2 series module integration .................................................... 118 2.17 Design-in checklist ........................................................................................................................ 120 2.17.1 Schematic checklist ................................................................................................................... 120 2.17.2 Layout checklist ......................................................................................................................... 121 2.17.3 Antenna checklist ...................................................................................................................... 121 3 Handling and soldering ........................................................................................... 122 3.1 Packaging, shipping, storage and moisture preconditioning ............................................................. 122 3.2 Handling ........................................................................................................................................... 122 3.3 Soldering .......................................................................................................................................... 123 3.3.1 Soldering paste.......................................................................................................................... 123 3.3.2 Reflow soldering ....................................................................................................................... 123 3.3.3 Optical inspection ...................................................................................................................... 124 3.3.4 Cleaning .................................................................................................................................... 124 3.3.5 Repeated reflow soldering ......................................................................................................... 125 3.3.6 Wave soldering.......................................................................................................................... 125 3.3.7 Hand soldering .......................................................................................................................... 125 3.3.8 Rework ...................................................................................................................................... 125 3.3.9 Conformal coating .................................................................................................................... 125 3.3.10 Casting ...................................................................................................................................... 125 3.3.11 Grounding metal covers ............................................................................................................ 125 3.3.12 Use of ultrasonic processes ........................................................................................................ 125 4 Approvals .................................................................................................................. 126 4.1 Product certification approval overview ............................................................................................. 126 4.2 Federal Communications Commission and Industry Canada notice ................................................... 127 4.2.1 Safety warnings review the structure ......................................................................................... 127 4.2.2 Declaration of Conformity – United States only ......................................................................... 127 4.2.3 Modifications ............................................................................................................................ 127 4.3 R&TTED and European Conformance CE mark ................................................................................. 129 5 Product testing ......................................................................................................... 130 5.1 u-blox in-series production test ......................................................................................................... 130 5.2 Test parameters for OEM manufacturer ............................................................................................ 131 5.2.1 “Go/No go” tests for integrated devices .................................................................................... 131 5.2.2 RF functional tests ..................................................................................................................... 131 Appendix ........................................................................................................................ 133
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Contents     Page 7 of 141 A Glossary .................................................................................................................... 133 B Migration between TOBY-L1 and TOBY-L2 ............................................................ 135 B.1 Overview .......................................................................................................................................... 135 B.2 Pin-out comparison between TOBY-L1 and TOBY-L2 ........................................................................ 136 B.3 Schematic for TOBY-L1 and TOBY-L2 integration .............................................................................. 138 Related documents......................................................................................................... 139 Revision history .............................................................................................................. 140 Contact ............................................................................................................................ 141
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 8 of 141 1 System description 1.1 Overview TOBY-L2 and MPCI-L2  series comprises LTE/3G/2G multi-mode  modules supporting up to six LTE bands, up to five UMTS/DC-HSPA+ bands and four GSM/(E)GPRS bands for voice and/or data transmission as following:  TOBY-L200 and MPCI-L200 are designed primarily for operation in America  TOBY-L210 and MPCI-L210 are designed primarily for operation in Europe, Asia and other countries TOBY-L2 and MPCI-L2 series are designed in two different form-factors suitable for applications as following:  TOBY-L2 modules are designed in the small TOBY  152-pin Land Grid Array form-factor (35.6 x 24.8  mm), easy to integrate in compact  designs and  form-factor compatible with the  u-blox cellular  module families: this  allows  customers  to  take  the  maximum  advantage  of  their  hardware  and  software  investments,  and provides very short time-to-market.  MPCI-L2 modules are designed in the industry standard PCI Express Full-Mini Card form-factor (51 x 30 mm) easy to integrate into industrial and consumer applications and also ideal for manufacturing of small series. With LTE Category 4 data rates at up to 150 Mb/s (down-link) and 50 Mb/s (up-link), the modules are ideal for applications  requiring  the  highest  data-rates  and  high-speed  internet  access.  TOBY-L2  and  MPCI-L2  series modules  are  the  perfect  choice  for  consumer  fixed-wireless  terminals,  mobile  routers  and  gateways,  and applications requiring video streaming. They are also optimally suited for industrial (M2M) applications, such as remote access to video cameras, digital signage, telehealth, and security and surveillance systems.  Table 1 summarizes the TOBY-L2 and MPCI-L2 series main features and interfaces.  Module LTE UMTS GSM Positioning Interfaces Audio Features  LTE category Bands HSDPA category HSUPA category Bands GPRS/EDGE multi-slot class Bands GNSS receiver GNSS Via Modem Assist Now Software CellLocate® UART USB 2.0 SDIO DCC (I2C) GPIOs MIMO 2x2 / Rx Diversity Analog audio Digital Audio  Network indication Antenna supervisor Jamming detection Embedded TCP/UDP stack Embedded HTTP,FTP,SSL FOTA eCall / ERA GLONASS Dual stack IPv4/IPv6 TOBY-L200 4 2,4,5, 7,17 24 6 850/900/AWS 1900/2100 12 Quad  F F F F • F F F •  F • F F F F F F • TOBY-L210 4 1,3,5, 7,8,20 24 6 850/900 1900/2100 12 Quad  F F F F • F F F •  F • F F F F F F • MPCI-L200 4 2,4,5, 7,17 24 6 850/900/AWS 1900/2100 12 Quad      •    •   •  F F F F  • MPCI-L210 4 1,3,5, 7,8,20 24 6 850/900 1900/2100 12 Quad      •    •   •  F F F F  • F = will be supported in future product version “01” Table 1: TOBY-L2 and MPCI-L2 series main features summary
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 9 of 141 Table 2 reports a summary of LTE, 3G and 2G cellular radio access technologies characteristics and features of the TOBY-L2 and MPCI-L2 series modules.  4G LTE 3G UMTS/HSDPA/HSUPA 2G GSM/GPRS/EDGE 3GPP Release 9 Long Term Evolution (LTE) Evolved Uni.Terrestrial Radio Access (E-UTRA) Frequency Division Duplex (FDD) DL Multi-Input Multi-Output (MIMO) 2 x 2  3GPP Release 8 Dual-Cell HS Packet Access (DC-HSPA+) UMTS Terrestrial Radio Access (UTRA) Frequency Division Duplex (FDD) DL Rx diversity  3GPP Release 8 Enhanced Data rate GSM Evolution (EDGE) GSM EGPRS Radio Access (GERA) Time Division Multiple Access (TDMA) DL Advanced Rx Performance (DARP) Phase 1 Band support:  TOBY-L200 / MPCI-L200:  Band 17 (700 MHz)  Band 5 (850 MHz)  Band 4 (1700 MHz)  Band 2 (1900 MHz)  Band 7 (2600 MHz)  TOBY-L210 / MPCI-L210:  Band 20 (800 MHz)  Band 5 (850 MHz)  Band 8 (900 MHz)  Band 3 (1800 MHz)  Band 1 (2100 MHz)  Band 7 (2600 MHz) Band support:  TOBY-L200 / MPCI-L200:  Band 5 (850 MHz)  Band 8 (900 MHz)  Band 4 (AWS, 1700 MHz)  Band 2 (1900 MHz)  Band 1 (2100 MHz)  TOBY-L210 / MPCI-L210:  Band 5 (850 MHz)  Band 8 (900 MHz)  Band 2 (1900 MHz)  Band 1 (2100 MHz) Band support  TOBY-L200 / MPCI-L200:  GSM 850 MHz  E-GSM 900 MHz  DCS 1800 MHz  PCS 1900 MHz   TOBY-L210 / MPCI-L210:  GSM 850 MHz  E-GSM 900 MHz  DCS 1800 MHz  PCS 1900 MHz LTE Power Class  Power Class 3 (23 dBm)  for LTE mode WCDMA/HSDPA/HSUPA Power Class  Power Class 3 (24 dBm)  for UMTS/HSDPA/HSUPA mode GSM/GPRS Power Class  Power Class 4 (33 dBm)  for GSM/E-GSM bands  Power Class 1 (30 dBm)  for DCS/PCS bands EDGE Power Class  Power Class E2 (27 dBm)  for GSM/E-GSM bands  Power Class E2 (26 dBm)  for DCS/PCS bands Data rate  LTE category 4:  up to 150 Mb/s DL, 50 Mb/s UL  Data rate  TOBY-L200 / MPCI-L200:  HSDPA cat.14, up to 21 Mb/s DL1  HSUPA cat.6, up to 5.6 Mb/s UL  TOBY-L210 / MPCI-L210:  HSDPA cat.24, up to 42 Mb/s DL  HSUPA cat.6, up to 5.6 Mb/s UL Data rate2  GPRS multi-slot class 123, CS1-CS4,  up to 85.6 kb/s DL/UL   EDGE multi-slot class 123, MCS1-MCS9  up to 236.8 kb/s DL/UL  Table 2: TOBY-L2 and MPCI-L2 series LTE, 3G and 2G characteristics summary                                                        1 HSDPA category 24 capable 2 GPRS/EDGE multi-slot class determines the number of timeslots available for upload and download and thus the speed at which data can be transmitted and received, with higher classes typically allowing faster data transfer rates. 3 GPRS/EDGE multi-slot class 12 implies a maximum of 4 slots in DL (reception) and 4 slots in UL (transmission) with 5 slots in total.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 10 of 141 1.2 Architecture Figure 1 summarizes the internal architecture of TOBY-L2 series modules. CellularBase-bandProcessorMemoryPower Management Unit26 MHz32.768 kHzANT1RF TransceiverANT2V_INT (I/O)V_BCKP (RTC)VCC (Supply)SIMUSBGPIOPower OnExternal ResetPAsLNAs FiltersFiltersDuplexerFiltersPAsLNAs FiltersFiltersDuplexerFiltersLNAs FiltersFiltersLNAs FiltersFiltersSwitchSwitchDDC(I2C)SDIOUARTDigital audio (I2S)ANT_DETHost Select Figure 1: TOBY-L2 series block diagram As described in the Figure 2, each MPCI-L2 series module integrates one TOBY-L2 series module:  The MPCI-L200 integrates a TOBY-L200 module  The MPCI-L210 integrates a TOBY-L210 module The TOBY-L2 module represents the core of the device, providing the related LTE/3G/2G modem and processing functionalities. Additional signal conditioning circuitry is implemented for PCI Express Mini Card compliance, and two UF.L connectors are available for easy antenna integration.  ANT1SIMUSBW_DISABLE#TOBY-L2seriesSignal ConditioningANT2PERST#LED_WWAN#U.FLU.FL3.3Vaux (Supply)Boost ConverterVCC Figure 2: MPCI-L2 series block diagram
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 11 of 141 1.2.1 Internal blocks As described in Figure 2, each MPCI-L2 series module integrates one TOBY-L2 series module, which consists of the following internal sections: RF, baseband and power management. RF section The RF section is composed of RF transceiver, PAs, LNAs, crystal oscillator, filters, duplexers and RF switches. Tx signal is pre-amplified by RF transceiver, then output to the primary antenna input/output port (ANT1) of the module via power amplifier (PA), SAW band pass filters band, specific duplexer and antenna switch. Dual receiving paths are implemented according to LTE Down-Link MIMO 2 x 2 and 3G Receiver Diversity radio technologies supported by the modules as LTE category  4 and HSDPA category 24  User Equipments: incoming signals  are  received  through  the  primary  (ANT1)  and  the  secondary  (ANT2)  antenna  input  ports  which  are connected to the RF transceiver via specific antenna switch, diplexer, duplexer, LNA, SAW band pass filters.   RF transceiver performs modulation, up-conversion of the baseband I/Q signals for Tx, down-conversion and demodulation of the dual RF signals for Rx. The RF transceiver contains: Automatically gain controlled direct conversion Zero-IF receiver, Highly linear RF demodulator / modulator capable GMSK, 8-PSK, QPSK, 16-QAM, 64-QAM, Fractional-N Sigma-Delta RF synthesizer, VCO.  Power Amplifiers (PA) amplify the Tx signal modulated by the RF transceiver   RF switches connect primary (ANT1) and secondary (ANT2) antenna ports to the suitable Tx / Rx path  Low Noise Amplifiers (LNA) enhance the received sensitivity  SAW duplexers separate the Tx and Rx signal paths and provide RF filtering  SAW band pass filters enhance the rejection of out-of-band signals  26 MHz crystal oscillator generates the clock reference in active-mode or connected-mode.  Baseband and power management section The Baseband and Power Management section is composed of the following main elements:  A mixed signal ASIC, which integrates Microprocessor for control functions DSP core for LTE/3G/2G Layer 1 and digital processing of Rx and Tx signal paths Memory interface controller Dedicated peripheral blocks for control of the USB, SIM and GPIO digital interfaces Analog front end interfaces to RF transceiver ASIC  Memory system, which includes NAND flash and LPDDR  Voltage regulators to derive all the subsystem supply voltages from the module supply input VCC  Voltage sources for external use: V_BCKP and V_INT (not available on MPCI-L2 series modules)  Hardware power on   Hardware reset  Low power idle-mode support  32.768 kHz crystal oscillator to provide the clock reference in the low power idle-mode, which can be set by enable power saving configuration using the AT+UPSV command.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 12 of 141 1.3 Pin-out 1.3.1 TOBY-L2 series pin assignment Table 3 lists the pin-out of the TOBY-L2 series modules, with pins grouped by function.  Function Pin Name Pin No I/O Description Remarks Power VCC 70,71,72 I Module supply input VCC pins are internally connected each other. VCC supply circuit affects the RF performance and compliance of the device integrating the module with applicable required certification schemes. See section 1.5.1 for functional description and requirements for the VCC module supply. See section 2.2.1 for external circuit design-in.  GND 2, 30, 32, 44, 46, 69, 73, 74, 76, 78, 79, 80, 82, 83, 85, 86, 88-90, 92-152 N/A Ground GND pins are internally connected each other. External ground connection affects the RF and thermal performance of the device. See section 1.5.1 for functional description. See section 2.2.1 for external circuit design-in.  V_BCKP 3 I/O RTC supply input/output V_BCKP = 3.0 V (typical) generated by internal regulator when valid VCC supply is present. See section 1.5.2 for functional description. See section 2.2.2 for external circuit design-in.  V_INT 5 O Generic digital interfaces supply output V_INT = 1.8 V (typical) generated by internal regulator when the module is switched on. See section 1.5.3 for functional description. See section 2.2.3 for external circuit design-in. System PWR_ON 20 I Power-on input Internal active pull-up to the VCC enabled. See section 1.6.1 for functional description. See section 2.3.1 for external circuit design-in.  RESET_N 23 I External reset input Internal active pull-up to the VCC enabled. See section 1.6.3 for functional description. See section 2.3.2 for external circuit design-in.  HOST_SELECT0 26 I Selection of module configuration by the host processor Note: Not supported by TOBY-L2x0-00S product version See section 1.6.4 for functional description. See section 2.3.3 for external circuit design-in.  HOST_SELECT1 62 I Selection of module configuration by the host processor Note: Not supported by TOBY-L2x0-00S product version See section 1.6.4 for functional description. See section 2.3.3 for external circuit design-in. Antennas ANT1  81 I/O Primary antenna Main Tx / Rx antenna interface. 50  nominal characteristic impedance. Antenna circuit affects the RF performance and application device compliance with required certification schemes. See section 1.7 for functional description / requirements. See section 2.4 for external circuit design-in.  ANT2 87 I Secondary antenna Rx only for MIMO 2x2 and Rx diversity. 50  nominal characteristic impedance. Antenna circuit affects the RF performance and application device compliance with required certification schemes. See section 1.7 for functional description / requirements  See section 2.4 for external circuit design-in.  ANT_DET 75 I Antenna detection Note: antenna detection not supported by TOBY-L2x0-00S. See section 1.7.2 for functional description. See section 2.4.2 for external circuit design-in.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 13 of 141 Function Pin Name Pin No I/O Description Remarks SIM VSIM 59 O SIM supply output VSIM = 1.8 V / 3 V automatically generated according to the connected SIM type. See section 1.8 for functional description. See section 2.5 for external circuit design-in.  SIM_IO 57 I/O SIM data Data input/output for 1.8 V / 3 V SIM Internal 4.7 k pull-up to VSIM. See section 1.8 for functional description. See section 2.5 for external circuit design-in.  SIM_CLK 56 O SIM clock 3.25 MHz clock output for 1.8 V / 3 V SIM See section 1.8 for functional description. See section 2.5 for external circuit design-in.  SIM_RST 58 O SIM reset Reset output for 1.8 V / 3 V SIM See section 1.8 for functional description. See section 2.5 for external circuit design-in. USB VUSB_DET 4 I USB detect input  Input for VBUS (5 V typical) USB supply sense. See section 1.9.1 for functional description. See section 2.6.1 for external circuit design-in.  USB_D- 27 I/O USB Data Line D- USB interface for AT commands, data communication, FOAT, FW update by u-blox EasyFlash tool and diagnostic. 90  nominal differential impedance (Z0) 30  nominal common mode impedance (ZCM) Pull-up or pull-down resistors and external series resistors as required by the USB 2.0 specifications [4] are part of the USB pad driver and need not be provided externally. See section 1.9.1 for functional description. See section 2.6.1 for external circuit design-in.  USB_D+ 28 I/O USB Data Line D+ USB interface for AT commands, data communication, FOAT, FW update by u-blox EasyFlash tool and diagnostic. 90  nominal differential impedance (Z0) 30  nominal common mode impedance (ZCM) Pull-up or pull-down resistors and external series resistors as required by the USB 2.0 specifications [4] are part of the USB pad driver and need not be provided externally. See section 1.9.1 for functional description. See section 2.6.1 for external circuit design-in. UART RXD 17 O UART data output Note: UART not supported by TOBY-L2x0-00S. 1.8 V output, Circuit 104 (RXD) in ITU-T V.24,  for AT command, data communication, FOAT. Add Test-Point and series 0  to access for diagnostic. See section 1.9.2 for functional description. See section 2.6.2 for external circuit design-in.  TXD 16 I UART data input Note: UART not supported by TOBY-L2x0-00S. 1.8 V input, Circuit 103 (TXD) in ITU-T V.24,  for AT command, data communication, FOAT. Add Test-Point and series 0  to access for diagnostic. See section 1.9.2 for functional description. See section 2.6.2 for external circuit design-in.  CTS 15 O UART clear to send output Note: UART not supported by TOBY-L2x0-00S. 1.8 V output, Circuit 106 (CTS) in ITU-T V.24. Add Test-Point and series 0  to access for diagnostic. See section 1.9.2 for functional description. See section 2.6.2 for external circuit design-in.  RTS 14 I UART ready to send input Note: UART not supported by TOBY-L2x0-00S. 1.8 V input, Circuit 105 (RTS) in ITU-T V.24. Add Test-Point and series 0  to access for diagnostic. See section 1.9.2 for functional description. See section 2.6.2 for external circuit design-in.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 14 of 141 Function Pin Name Pin No I/O Description Remarks  DSR 10 O / I/O UART data set ready output / GPIO Note: UART / GPIO not supported by TOBY-L2x0-00S. 1.8 V, Circuit 107 in ITU-T V.24, configurable as GPIO. Add Test-Point and series 0  to access for diagnostic. See section 1.9.2 and 1.11 for functional description. See section 2.6.2 and 2.8 for external circuit design-in.  RI 11 O / I/O UART ring indicator output / GPIO Note: UART / GPIO not supported by TOBY-L2x0-00S. 1.8 V, Circuit 125 in ITU-T V.24, configurable as GPIO. Add Test-Point and series 0  to access for diagnostic. See section 1.9.2 and 1.11 for functional description. See section 2.6.2 and 2.8 for external circuit design-in.  DTR 13 I / I/O UART data terminal ready input / GPIO Note: UART / GPIO not supported by TOBY-L2x0-00S. 1.8 V, Circuit 108/2 in ITU-T V.24, configurable as GPIO. Add Test-Point and series 0  to access for diagnostic. See section 1.9.2 and 1.11 for functional description. See section 2.6.2 and 2.8 for external circuit design-in.  DCD 12 O / I/O UART data carrier detect output / GPIO Note: UART / GPIO not supported by TOBY-L2x0-00S. 1.8 V, Circuit 109 in ITU-T V.24, configurable as GPIO. Add Test-Point and series 0  to access for diagnostic. See section 1.9.2 and 1.11 for functional description. See section 2.6.2 and 2.8 for external circuit design-in. DDC SCL 54 O I2C bus clock line Note: I2C not supported by TOBY-L2x0-00S. 1.8 V open drain, for communication with u-blox GNSS receivers and other I2C-slave devices as an audio codec. External pull-up required. See section 1.9.3 for functional description. See section 2.6.3 for external circuit design-in.  SDA 55 I/O I2C bus data line Note: I2C not supported by TOBY-L2x0-00S. 1.8 V open drain, for communication with u-blox GNSS receivers and other I2C-slave devices as an audio codec. External pull-up required. See section 1.9.3 for functional description. See section 2.6.3 for external circuit design-in. SDIO SDIO_D0 66 I/O SDIO serial data [0] Note: SDIO not supported by TOBY-L2x0-00S. SDIO interface for communication with external Wi-Fi chip See section 1.9.4 for functional description. See section 2.6.4 for external circuit design-in.  SDIO_D1 68 I/O SDIO serial data [1] Note: Not supported by TOBY-L2x0-00S. SDIO interface for communication with external Wi-Fi chip See section 1.9.4 for functional description. See section 2.6.4 for external circuit design-in.  SDIO_D2 63 I/O SDIO serial data [2] Note: SDIO not supported by TOBY-L2x0-00S. SDIO interface for communication with external Wi-Fi chip See section 1.9.4 for functional description. See section 2.6.4 for external circuit design-in.  SDIO_D3 67 I/O SDIO serial data [3] Note: SDIO not supported by TOBY-L2x0-00S. SDIO interface for communication with external Wi-Fi chip See section 1.9.4 for functional description. See section 2.6.4 for external circuit design-in.  SDIO_CLK 64 O SDIO serial clock Note: SDIO not supported by TOBY-L2x0-00S. SDIO interface for communication with external Wi-Fi chip See section 1.9.4 for functional description. See section 2.6.4 for external circuit design-in.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 15 of 141 Function Pin Name Pin No I/O Description Remarks  SDIO_CMD 65 I/O SDIO command Note: SDIO not supported by TOBY-L2x0-00S. SDIO interface for communication with external Wi-Fi chip See section 1.9.4 for functional description. See section 2.6.4 for external circuit design-in. Audio I2S_TXD 51 O / I/O I2S transmit data / GPIO Note: I2S and GPIO not supported by TOBY-L2x0-00S. I2S transmit data output, alternatively configurable as GPIO. See sections 1.10 and 1.11 for functional description. See sections 2.7 and 2.8 for external circuit design-in.  I2S_RXD 53 I / I/O I2S receive data / GPIO Note: I2S and GPIO not supported by TOBY-L2x0-00S. I2S receive data input, alternatively configurable as GPIO. See sections 1.10 and 1.11 for functional description. See sections 2.7 and 2.8 for external circuit design-in.  I2S_CLK 52 I/O / I/O I2S clock / GPIO Note: I2S and GPIO not supported by TOBY-L2x0-00S. I2S serial clock, alternatively configurable as GPIO. See sections 1.10 and 1.11 for functional description. See sections 2.7 and 2.8 for external circuit design-in.  I2S_WA 50 I/O / I/O I2S word alignment / GPIO Note: I2S and GPIO not supported by TOBY-L2x0-00S. I2S word alignment, alternatively configurable as GPIO. Note: I2S not supported by TOBY-L2x0-00S. See sections 1.10 and 1.11 for functional description. See sections 2.7 and 2.8 for external circuit design-in. GPIO GPIO1 21 I/O GPIO Note: GPIO not supported by TOBY-L2x0-00S except for Wireless Network status indication configured on GPIO1. 1.8 V GPIO with alternatively configurable functions  See section 1.11 for functional description. See section 2.8 for external circuit design-in.  GPIO2 22 I/O GPIO Note: GPIO not supported by TOBY-L2x0-00S. 1.8 V GPIO with alternatively configurable functions  See section 1.11 for functional description. See section 2.8 for external circuit design-in.  GPIO3 24 I/O GPIO Note: GPIO not supported by TOBY-L2x0-00S. 1.8 V GPIO with alternatively configurable functions  See section 1.11 for functional description. See section 2.8 for external circuit design-in.  GPIO4 25 I/O GPIO Note: GPIO not supported by TOBY-L2x0-00S. 1.8 V GPIO with alternatively configurable functions  See section 1.11 for functional description. See section 2.8 for external circuit design-in.  GPIO5 60 I/O GPIO Note: GPIO not supported by TOBY-L2x0-00S. 1.8 V GPIO with alternatively configurable functions  See section 1.11 for functional description. See section 2.8 for external circuit design-in.  GPIO6 61 I/O GPIO Note: GPIO not supported by TOBY-L2x0-00S. 1.8 V GPIO  See section 1.11 for functional description. See section 2.8 for external circuit design-in. Reserved RSVD 6 N/A Reserved pin This pin must be connected to ground. See section 2.10  RSVD 1, 7-9, 18, 19, 29, 31, 33-43, 45, 47-49, 77, 84, 91 N/A Reserved pin Leave unconnected. See section 2.10 Table 3: TOBY-L2 series module pin definition, grouped by function
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 16 of 141 1.3.2 MPCI-L2 series pin assignment Table 4 lists the pin-out of the MPCI-L2 series modules, with pins grouped by function.  Function Pin Name Pin No I/O Description Remarks Power 3.3Vaux 2, 24, 39,  41, 52 I Module supply input 3.3Vaux pins are internally connected each other. 3.3Vaux supply circuit affects the RF performance and compliance of the device integrating the module with applicable required certification schemes. See section 1.5.1 for functional description and requirements for the 3.3Vaux module supply. See section 2.2.1 for external circuit design-in.  GND 4, 9, 15, 18, 21, 26, 27, 29, 34, 35, 37, 40, 43, 50 N/A Ground GND pins are internally connected each other. External ground connection affects the RF and thermal performance of the device. See section 1.5.1 for functional description. See section 2.2.1 for external circuit design-in. Auxiliary Signals PERST# 22 I External reset input Internal 45 k pull-up to 3.3 V supply. See section 1.6.3 for functional description. See section 2.3.2 for external circuit design-in. Antennas ANT1  U.FL I/O Primary antenna Main Tx / Rx antenna interface. 50  nominal characteristic impedance. Antenna circuit affects the RF performance and compliance of the device integrating the module with applicable required certification schemes. See section 1.7 for functional description / requirements. See section 2.4 for external circuit design-in.  ANT2 U.FL I Secondary antenna Rx only for MIMO 2x2 and Rx diversity. 50  nominal characteristic impedance. Antenna circuit affects the RF performance and compliance of the device integrating the module with applicable required certification schemes. See section 1.7 for functional description / requirements  See section 2.4 for external circuit design-in. SIM UIM_PWR 8 O SIM supply output UIM_PWR = 1.8 V / 3 V automatically generated according to the connected SIM type. See section 1.8 for functional description. See section 2.5 for external circuit design-in.  UIM_DATA 10 I/O SIM data Data input/output for 1.8 V / 3 V SIM Internal 4.7 k pull-up to UIM_PWR. See section 1.8 for functional description. See section 2.5 for external circuit design-in.  UIM_CLK 12 O SIM clock 3.25 MHz clock output for 1.8 V / 3 V SIM See section 1.8 for functional description. See section 2.5 for external circuit design-in.  UIM_RESET 14 O SIM reset Reset output for 1.8 V / 3 V SIM See section 1.8 for functional description. See section 2.5 for external circuit design-in.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 17 of 141 Function Pin Name Pin No I/O Description Remarks USB USB_D- 36 I/O USB Data Line D- USB interface for AT commands, data communication, FOAT, FW update by u-blox EasyFlash tool and diagnostic. 90  nominal differential impedance (Z0) 30  nominal common mode impedance (ZCM) Pull-up or pull-down resistors and external series resistors as required by the USB 2.0 specifications [4] are part of the USB pad driver and need not be provided externally. See section 1.9.1 for functional description. See section 2.6.1 for external circuit design-in.  USB_D+ 38 I/O USB Data Line D+ USB interface for AT commands, data communication, FOAT, FW update by u-blox EasyFlash tool and diagnostic. 90  nominal differential impedance (Z0) 30  nominal common mode impedance (ZCM) Pull-up or pull-down resistors and external series resistors as required by the USB 2.0 specifications [4] are part of the USB pad driver and need not be provided externally. See section 1.9.1 for functional description. See section 2.6.1 for external circuit design-in. Specific Signals LED_WWAN# 42 O LED indicator output Open drain active low output. See section 1.12 for functional description. See section 2.9 for external circuit design-in.  W_DISABLE# 20 I Wireless radio disable input Internal 22 k pull-up to 3.3Vaux. See section 1.12 for functional description. See section 2.9 for external circuit design-in. Not Connected NC 1, 3, 5-7, 11, 13, 16, 17, 19, 23, 25, 28, 30-33, 44-46, 47-49, 51 N/A Not connected Internally not connected. See section 1.14 for the description. Table 4: MPCI-L2 series module pin definition, grouped by function
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 18 of 141 1.4 Operating modes TOBY-L2 and MPCI-L2 series modules have several operating modes. The operating modes are defined in Table 5 and described in detail in Table 6, providing general guidelines for operation.  General Status Operating Mode Definition Power-down Not-Powered Mode VCC or 3.3Vaux supply not present or below operating range: module is switched off.  Power-Off Mode VCC or 3.3Vaux supply within operating range and module is switched off. Normal Operation Idle-Mode  Module processor core runs with 32 kHz reference generated by the internal oscillator.  Active-Mode Module processor core runs with 26 MHz reference generated by the internal oscillator.  Connected-Mode RF Tx/Rx data connection enabled and processor core runs with 26 MHz reference. Table 5: TOBY-L2 and MPCI-L2 series modules operating modes definition  Operating Mode Description Transition between operating modes Not-Powered Mode Module is switched off. Application interfaces are not accessible. When VCC or 3.3Vaux supply is removed, the modules enter not-powered mode. When in not-powered mode, TOBY-L2 modules cannot be switched on by PWR_ON, RESET_N or RTC alarm and enter active-mode after applying VCC supply (see 1.6.1). When in not-powered mode, MPCI-L2 modules cannot be switched on by RTC alarm and enter active-mode after applying 3.3Vaux supply (see 1.6.1). Power-Off Mode Module is switched off: normal shutdown by an appropriate power-off event (see 1.6.2). Application interfaces are not accessible. MPCI-L2 modules do not support Power-Off Mode but halt mode (see 1.6.2 and u-blox AT Commands Manual [3], AT+CFUN=127 command).  When the modules are switched off by an appropriate power-off event (see 1.6.2), the modules enter power-off mode from active-mode. When in power-off mode, TOBY-L2 modules can be switched on by PWR_ON, RESET_N or an RTC alarm. When in power-off mode, TOBY-L2 modules enter the not-powered mode after removing VCC supply. Idle-Mode Module is switched on with application interfaces disabled or suspended: the module is temporarily not ready to communicate with an external device by means of the application interfaces as configured to reduce the current consumption. The module enters the low power idle-mode whenever possible if power saving is enabled by AT+UPSV (see u-blox AT Commands Manual [3]) reducing current consumption (see 1.5.1.5). Power saving configuration is not enabled by default: it can be enabled by the AT+UPSV command (see the u-blox AT Commands Manual [3]). The modules automatically switch from active-mode to low power idle-mode whenever possible if power saving is enabled (see sections 1.5.1.5, 1.9.1.4, 1.9.2.4 and u-blox AT Commands Manual [3], AT+UPSV). The modules wake up from idle-mode to active-mode in the following events:  Automatic periodic monitoring of the paging channel for the paging block reception according to network conditions (see 1.5.1.5)  The connected USB host forces a remote wakeup of the module as USB device (see 1.9.1.4)  A preset RTC alarm occurs (see u-blox AT Commands Manual [3], AT+CALA)  Active-Mode Module is switched on with application interfaces enabled or not suspended: the module is ready to communicate with an external device by means of the application interfaces unless power saving configuration is enabled by AT+UPSV (see 1.9.1.4, 1.9.2.4 and u-blox AT Commands Manual [3]). When the modules are switched on by an appropriate power-on event (see 1.6.1), the module enter active-mode from power-off mode. If power saving configuration is enabled by the AT+UPSV command, the module automatically switches from active to idle-mode whenever possible and the module wakes up from idle to active-mode in the events listed above (see idle-mode to active-mode transition description above). When a RF Tx/Rx data connection is initiated or when RF Tx/Rx is required due to a connection previously initiated, the module switches from active to connected-mode.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 19 of 141 Operating Mode Description Transition between operating modes Connected-Mode RF Tx/Rx data connection is in progress. The module is prepared to accept data signals from an external device unless power saving configuration is enabled by AT+UPSV (see sections 1.9.1.4, 1.9.2.4 and u-blox AT Commands Manual [3]). When a data connection is initiated, the module enters connected-mode from idle-mode. If power saving configuration is enabled by the AT+UPSV command, the module automatically switches from connected to active and then idle-mode whenever possible and the module wakes up from idle to active and then connected mode if RF Transmission/Reception is necessary. When a data connection is terminated, the module returns to the active-mode. Table 6: TOBY-L2 and MPCI-L2 series modules operating modes description  Figure 3 describes the transition between the different operating modes.  TOBY-L2 Switch ON:•Apply VCCMPCI-L2 Switch ON:•Apply 3.3VauxIf power saving is enabled and there is no activity for a defined time intervalAny wake up event described in the module operating modes summary table aboveIncoming/outgoing call or other dedicated device network communicationNo RF Tx/Rx in progress,       Call terminated, Communication droppedTOBY-L2x0 Switch ON:•PWR_ON•RESET_N•RTC alarmNot poweredPower offActiveConnected IdleTOBY-L2x0   Switch OFF:•AT+CPWROFF•RESET_NMPCI-L2:•Remove 3.3VauxTOBY-L2:•Remove VCC Figure 3: TOBY-L2 and MPCI-L2 series modules operating modes transition
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 20 of 141 1.5 Supply interfaces 1.5.1 Module supply input (VCC or 3.3Vaux) TOBY-L2 modules are supplied via the three VCC pins, and MPCI-L2 modules are supplied via the five 3.3Vaux pins. All supply voltages used inside the modules are generated from the  VCC or the 3.3Vaux supply input by integrated voltage regulators, including the V_BCKP RTC supply, the V_INT generic digital interface supply, and the VSIM or UIM_PWR SIM interface supply. The current drawn by the TOBY-L2 and MPCI-L2 series modules through the VCC or 3.3Vaux pins can vary by several orders of magnitude depending on radio access  technology,  operation  mode and  state.  It is important that the supply source is able to support both the high peak of current consumption during 2G transmission at maximum RF power level (as described in the section 1.5.1.2) and the high average current consumption during 3G and LTE transmission at maximum RF power level (as described in the sections 1.5.1.3 and 1.5.1.4).  1.5.1.1 VCC or 3.3Vaux supply requirements Table 7 summarizes the requirements for the VCC or 3.3Vaux modules supply. See section 2.2.1 for suggestions to properly design a VCC or 3.3Vaux supply circuit compliant with the requirements listed in Table 7.   The  supply  circuit  affects  the  RF  compliance  of  the  device  integrating  TOBY-L2  and  MPCI-L2 series modules with applicable required certification schemes as well as antenna circuit design. Compliance is guaranteed if the requirements summarized in the Table 7 are fulfilled.  Item Requirement Remark VCC or 3.3Vaux nominal voltage Within VCC or 3.3Vaux normal operating range: See “Supply/Power pins” section in the TOBY-L2 Data Sheet [1] or in the MPCI-L2 Data Sheet [2]. The modules cannot be switched on if the supply voltage is below the normal operating range minimum limit. VCC or 3.3Vaux voltage during normal operation Within VCC or 3.3Vaux extended operating range: See “Supply/Power pins” section in the TOBY-L2 Data Sheet [1] or in the MPCI-L2 Data Sheet [2]. The modules may switch off if the supply voltage drops below the extended operating range minimum limit. VCC or 3.3Vaux average current Support with adequate margin the highest averaged current consumption value in connected-mode conditions specified for VCC in TOBY-L2 Data Sheet [1] or specified for 3.3Vaux in MPCI-L2 Data Sheet [2]. The maximum average current consumption can be greater than the specified value according to the actual antenna mismatching, temperature and supply voltage. Sections  1.5.1.2,  1.5.1.3  and  1.5.1.4  describe  current consumption profiles in 2G, 3G and LTE connected-mode. VCC or 3.3Vaux peak current Support with margin the highest peak current consumption value in 2G connected-mode conditions specified for VCC in TOBY-L2 Data Sheet [1] or specified for 3.3Vaux in MPCI-L2 Data Sheet [2]. The specified maximum peak of current consumption occurs during GSM single transmit slot in 850/900 MHz connected-mode, in case of mismatched antenna. Section 1.5.1.2 describes 2G Tx peak/pulse current. VCC or 3.3Vaux voltage drop during  2G Tx slots Lower than 400 mV Supply voltage drop values greater than recommended during 2G TDMA transmission slots directly affect the RF compliance with applicable certification schemes. Figure 5 describes supply voltage drop during 2G Tx slots. VCC or 3.3Vaux voltage ripple during  RF transmission Noise in the supply has to be minimized  High supply voltage ripple values during LTE/3G/2G RF transmissions in connected-mode directly affect the RF compliance with applicable certification schemes. Figure 5 describes supply voltage ripple during RF Tx. VCC or 3.3Vaux under/over-shoot at start/end of Tx slots Absent or at least minimized Supply  voltage  under-shoot  or  over-shoot  at  the  start  or the end of 2G TDMA transmission slots directly affect the RF compliance with applicable certification schemes. Figure 5 describes supply voltage under/over-shoot  Table 7: Summary of VCC or 3.3Vaux modules supply requirements
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 21 of 141 1.5.1.2 VCC or 3.3Vaux current consumption in 2G connected-mode When a GSM call is established, the VCC or 3.3Vaux module current consumption is determined by the current consumption profile typical of the GSM transmitting and receiving bursts. The peak of current consumption during a transmission slot is strictly dependent on the  RF transmitted power, which is regulated by the network. The transmitted power in the transmit slot is also the more relevant factor for determining the average current consumption. If the module is transmitting in 2G single-slot mode in the 850 or 900 MHz bands, at the maximum RF power level (approximately 2 W or 33 dBm in the allocated transmit slot/burst) the current consumption can reach an high peak (see the “Current consumption” section in the TOBY-L2 Data Sheet [1] or the MPCI-L2 Data Sheet [2]) for 576.9 µs (width of the transmit slot/burst) with a periodicity of 4.615 ms (width of 1 frame = 8 slots/burst), so with a 1/8 duty cycle according to GSM TDMA (Time Division Multiple Access). If the module is transmitting in 2G single-slot mode in the 1800 or 1900 MHz bands, the current consumption figures are quite less high than the one in the low bands, due to 3GPP transmitter output power specifications. During a GSM call, current consumption is not so significantly high in receiving or in monitor bursts and is low in the inactive unused bursts.  Figure 4 shows an example of the module current consumption profile versus time in 2G single-slot mode.  Time [ms]RX   slotunused slotunused slotTX  slotunused slotunused slotMON       slotunused slotRX   slotunused slotunused slotTX   slotunused slotunused slotMON   slotunused slotGSM frame             4.615 ms                                       (1 frame = 8 slots)Current [A]200 mA60-120 mA1900 mAPeak current depends on TX power and actual antenna loadGSM frame             4.615 ms                                       (1 frame = 8 slots)60-120 mA10-40 mA0.01.51.00.52.02.5 Figure 4: VCC or 3.3Vaux current consumption profile versus time during a 2G single-slot call (1 TX slot, 1 RX slot) Figure  5  illustrates  VCC  or  3.3Vaux  voltage  profile  versus  time  during  a  2G  single-slot  call,  according  to  the relative VCC or 3.3Vaux current consumption profile described in Figure 4.  Time [ms]undershootovershootrippledropVoltage [mV]3.8 V (typ)RX     slotunused slotunused slotTX     slotunused slotunused slotMON       slotunused slotRX     slotunused slotunused slotTX     slotunused slotunused slotMON   slotunused slotGSM frame             4.615 ms                                       (1 frame = 8 slots)GSM frame             4.615 ms                                       (1 frame = 8 slots) Figure 5: VCC or 3.3Vaux voltage profile versus time during a 2G single-slot call (1 TX slot, 1 RX slot)
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 22 of 141 When a GPRS connection is established, more than one slot can be used to transmit and/or more than one slot can  be  used  to  receive.  The  transmitted  power  depends  on  network  conditions,  which  set  the  peak  current consumption, but following the 3GPP specifications the maximum Tx RF power is reduced if more than one slot is used to transmit, so the maximum peak of current is not as high as can be in case of a 2G single-slot call. If the module transmits in GPRS class 12 in the 850 or 900 MHz bands, at the maximum RF power control level, the current consumption can reach a quite high peak but lower than the one achievable in 2G single-slot mode. This happens for 2.307 ms (width of the 4 transmit slots/bursts) with a periodicity of 4.615 ms (width of 1 frame = 8 slots/bursts), so with a 1/2 duty cycle, according to 2G TDMA.  If the module is in GPRS connected mode in the 1800 or 1900 MHz bands, the current consumption figures are quite less high than the one in the low bands, due to 3GPP transmitter output power specifications.  Figure  6  reports  the  current  consumption  profiles  in  GPRS  class  12  connected  mode,  in  the  850  or  900 MHz bands, with 4 slots used to transmit and 1 slot used to receive.   Time [ms]RX   slotunused slotTX              slotTX   slotTX           slotTX                        slotMON       slotunused slotRX  slotunused slotTX                              slotTX   slotTX             slotTX                                slotMON   slotunused slotGSM frame             4.615 ms                                       (1 frame = 8 slots)Current [A]200mA60-130mAPeak current depends on TX power and actual antenna loadGSM frame             4.615 ms                                       (1 frame = 8 slots)1600 mA0.01.51.00.52.02.5 Figure 6: VCC or 3.3Vaux current consumption profile during a 2G GPRS/EDGE multi-slot connection (4 TX slots, 1 RX slot)  In case of EDGE connections the VCC current consumption profile is very similar to the GPRS current profile, so the image shown in Figure 6, representing the current consumption profile in GPRS class 12 connected mode, is valid for the EDGE class 12 connected mode as well.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 23 of 141 1.5.1.3 VCC or 3.3Vaux current consumption in 3G connected mode During a 3G connection, the module can transmit and receive continuously due to the Frequency Division Duplex (FDD) mode of operation with the Wideband Code Division Multiple Access (WCDMA). The current consumption depends again on output RF power, which is always regulated by network commands. These power control commands are logically divided into a slot of 666 µs, thus the rate of power change can reach a maximum rate of 1.5 kHz. There  are  no  high  current  peaks  as  in  the  2G  connection,  since  transmission  and  reception  are  continuously enabled due to FDD WCDMA implemented in the 3G that differs from the TDMA implemented in the 2G case. In  the  worst  scenario,  corresponding  to  a  continuous  transmission  and  reception  at  maximum  output  power (approximately 250 mW or 24 dBm), the average current drawn by the module at the VCC pins is high (see the “Current consumption” section in TOBY-L2 Data Sheet [1] or in MPCI-L2 Data Sheet [2]). Even at lowest output RF  power  (approximately  0.01  µW  or  -50  dBm),  the  current  is  still  not  so  low  due  to  module  baseband processing and transceiver activity.  Figure 7 shows an example of current consumption profile of the module in 3G WCDMA/DC-HSPA+ continuous transmission mode.  Time [ms]3G frame  10 ms                                       (1 frame = 15 slots)Current [mA]Current consumption value depends on TX power and actual antenna load170 mA1 slot  666 µs850 mA0300200100500400600700800 Figure 7: VCC or 3.3Vaux current consumption profile versus time during a 3G connection (TX and RX continuously enabled)
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 24 of 141 1.5.1.4 VCC or 3.3Vaux current consumption in LTE connected-mode During a LTE connection, the module can transmit and receive continuously due to LTE radio access technology. The current consumption is strictly dependent on the transmitted RF output power, which is always regulated by network commands. These power control commands are logically divided into a slot of  0.5 ms (time length of one Resource Block), thus the rate of power change can reach a maximum rate of 2 kHz.   Figure  8  shows  an  example  of  the  module  current  consumption  profile  versus  time  in  LTE  connected-mode. Detailed current consumption values can be found in TOBY-L2 Data Sheet [1] and in MPCI-L2 Data Sheet [2].  Time [ms]Current [mA]Current consumption value depends on TX power and actual antenna load1 Slot1 Resource Block (0.5 ms) 1 LTE Radio Frame (10 ms)0300200100500400600700800 Figure 8: VCC or 3.3Vaux current consumption profile versus time during LTE connection (TX and RX continuously enabled)
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 25 of 141 1.5.1.5 VCC or 3.3Vaux current consumption in cyclic idle/active mode (power saving enabled) The power saving configuration is by default disabled, but it can be enabled using the AT+UPSV command (see the u-blox AT Commands Manual [3]). When power saving is enabled, the module automatically enters the low power idle-mode whenever possible, reducing current consumption. During low power idle-mode, the module processor runs with 32 kHz reference clock frequency. When  the  power  saving  configuration  is  enabled  and  the  module is  registered  or  attached  to  a  network,  the module automatically enters the low power idle-mode whenever possible,  but it must periodically monitor the paging  channel  of  the  current  base  station  (paging  block  reception),  in  accordance  to  the  2G/3G/LTE  system requirements, even if connected-mode is not enabled by the application. When the module monitors the paging channel,  it  wakes  up  to  the  active-mode,  to  enable  the  reception  of  paging  block.  In  between,  the  module switches to low power idle-mode. This is known as discontinuous reception (DRX). The  module  processor  core  is  activated  during  the  paging  block  reception,  and  automatically  switches  its reference clock frequency from 32 kHz to the 26 MHz used in active-mode. The  time  period  between  two  paging  block  receptions  is  defined  by  the  network.  This  is  the  paging  period parameter, fixed by the base station through broadcast channel sent to all users on the same serving cell. In case of 2G radio access technology, the paging period can vary from 470.76 ms (DRX = 2, length of 2 x 51 2G frames = 2 x 51 x 4.615 ms) up to 2118.42 ms (DRX = 9, length of 9 x 51 2G frames = 9 x 51 x 4.615 ms).  In case of 3G radio access technology, the paging period can vary from 640 ms (DRX = 6, i.e. length of 26 3G frames = 64 x 10 ms) up to 5120 ms (DRX = 9, length of 29 3G frames = 512 x 10 ms). In  case  of  LTE  radio  access  technology,  the  paging  period  can  vary  from  320  ms  (DRX  =  5,  length  of  25  LTE frames = 32 x 10 ms) up to 2560 ms (DRX = 8, length of 28 LTE frames = 256 x 10 ms). Figure 9 illustrates a typical example of the module current consumption profile when power saving is enabled. The module is registered with network, automatically enters the low power idle-mode and periodically wakes up to  active-mode  to  monitor  the  paging  channel  for  the  paging  block  reception.  Detailed  current  consumption values can be found in TOBY-L2 Data Sheet [1] and in MPCI-L2 Data Sheet [2].  ~50 msIDLE MODE ACTIVE MODE IDLE MODEActive Mode EnabledIdle Mode Enabled2G case: 0.44-2.09 s    3G case: 0.61-5.09 s LTE case: 0.27-2.51 sIDLE MODE~50 msACTIVE MODETime [s]Current [mA]Time [ms]Current [mA]RX Enabled01000100 Figure  9:  VCC  or  3.3Vaux current consumption profile with  power saving  enabled  and  module registered with  the network:  the module is in idle-mode and periodically wakes up to active-mode to monitor the paging channel for paging block reception
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 26 of 141 1.5.1.6 VCC or 3.3Vaux current consumption in fixed active-mode (power saving disabled) When power saving is disabled, the  module does not  automatically enter the low power  idle-mode  whenever possible: the module remains in  active-mode. Power saving configuration is  by default  disabled. It can  also be disabled using the AT+UPSV command (see u-blox AT Commands Manual [3] for detail usage). The module processor core is activated during idle-mode, and the 26 MHz reference clock frequency is used. It would draw more current during the paging period than that in the power saving mode. Figure 10 illustrates a typical example of the module current consumption profile when power saving is disabled. In  such  case,  the  module  is  registered  with  the  network  and  while  active-mode  is  maintained,  the  receiver  is periodically activated to monitor the paging channel for paging block reception.  ACTIVE MODE2G case: 0.44-2.09 s    3G case: 0.61-5.09 sLTE case: 0.32-2.56 sPaging periodTime [s]Current [mA]Time [ms]Current [mA]RX Enabled01000100 Figure 10: VCC or 3.3Vaux current consumption profile with power saving disabled and module registered with the network: active-mode is always held and the receiver is periodically activated to monitor the paging channel for paging block reception
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 27 of 141 1.5.2 RTC supply input/output (V_BCKP)   The RTC supply V_BCKP pin is not available on MPCI-L2 series modules.  The V_BCKP  pin  of  TOBY-L2 series  modules connects  the supply for the  Real Time Clock (RTC). A linear LDO regulator integrated in the Power Management Unit internally generates this supply, as shown in Figure 11, with low current  capability  (see  the  TOBY-L2  series  Data  Sheet  [1]).  The  output  of  this  regulator  is  always  enabled when the main module voltage supply applied to the VCC pins is within the valid operating range.  Baseband Processor70VCC71VCC72VCC3V_BCKPLinear LDOPower ManagementTOBY-L2 series32 kHzRTC Figure 11: TOBY-L2 series RTC supply (V_BCKP) simplified block diagram The RTC provides the module time reference (date and time) that is used to set the wake-up interval during the low power idle-mode periods, and is able to make available the programmable alarm functions. The RTC functions are available also in power-down  mode  when  the  V_BCKP  voltage is within its  valid range (specified in the “Input characteristics of  Supply/Power pins” table in  TOBY-L2  series Data Sheet [1]). The  RTC can be supplied from an external back-up battery through the V_BCKP, when the main module voltage supply is not applied to the VCC pins. This lets the time reference (date and time) run until the V_BCKP voltage is within its valid range, even when the main supply is not provided to the module. Consider  that  the  module  cannot  switch  on  if  a  valid  voltage  is  not  present  on  VCC  even  when  the  RTC  is supplied through V_BCKP (meaning that VCC is mandatory to switch on the module). The RTC has very low current consumption, but is highly temperature dependent. For example, V_BCKP current consumption at the maximum operating temperature can be higher than the typical value at 25 °C specified in the “Input characteristics of Supply/Power pins” table in the TOBY-L2 series Data Sheet [1]. If V_BCKP is left unconnected and the module main supply is not applied to the VCC pins, the RTC is supplied from  the  bypass  capacitor  mounted  inside  the  module.  However,  this  capacitor  is  not  able  to  provide  a  long buffering time: within few milliseconds the voltage on V_BCKP will go below the valid range (1.4 V min). This has no impact on cellular connectivity, as all the module functionalities do not rely on date and time setting.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 28 of 141 1.5.3 Generic digital interfaces supply output (V_INT)   The generic digital interfaces supply V_INT pin is not available on MPCI-L2 series modules.  The  V_INT  output  pin  of  the  TOBY-L2  series modules  is  connected  to  an  internal  1.8  V  supply  with  current capability specified in the TOBY-L2 series Data Sheet [1]. This supply is internally generated by a switching step-down regulator integrated in the Power Management Unit and it is internally used to source the generic digital I/O interfaces of the TOBY-L2 module, as described in Figure 12. The output of this regulator is enabled when the module is switched on and it is disabled when the module is switched off.  Baseband Processor70VCC71VCC72VCC5V_INTSwitchingStep-DownPower ManagementTOBY-L2 seriesDigital I/O Figure 12: TOBY-L2 series generic digital interfaces supply output (V_INT) simplified block diagram The switching regulator operates in Pulse Width Modulation (PWM)  mode for greater efficiency at high output loads and it automatically switches to Pulse Frequency Modulation (PFM) power save mode for greater efficiency at low output loads. The V_INT output voltage ripple is specified in the TOBY-L2 series Data Sheet [1].
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 29 of 141 1.6 System function interfaces 1.6.1 Module power-on  The PWR_ON input pin is not available on MPCI-L2 series modules.  When  the  TOBY-L2  and  MPCI-L2  series  modules are  in  the  not-powered  mode  (switched  off,  i.e.  the  VCC  or 3.3Vaux module supply is not applied), they can be switched on as following:  Rising edge on the VCC or 3.3Vaux supply input to a valid voltage for module supply, so that the module switches on applying a proper VCC or 3.3Vaux supply within the normal operating range.  Alternately,  the  RESET_N  or  PERST#  pin  can  be  held  to  the  low  level  during  the  VCC  or  3.3Vaux  rising edge,  so  that  the  module  switches  on  releasing  the  RESET_N  or  PERST# pin  when  the  VCC or  3.3Vaux module supply voltage stabilizes at its proper nominal value within the normal operating range. The status of the PWR_ON input pin of TOBY-L2 modules while applying the VCC module supply is not relevant: during this phase the PWR_ON pin can be set high or low by the external circuit.  When the TOBY-L2 modules are in the power-off mode (i.e. switched off with valid VCC module supply applied), they can be switched on as following:  Low level on the PWR_ON pin, which is normally set high by an internal pull-up, for a valid time period.  Low level on the RESET_N pin, which is normally set high by an internal pull-up, for a valid time period.  RTC alarm, i.e. pre-programmed alarm by AT+CALA command (see u-blox AT Commands Manual [3]).  As described in Figure 13, the TOBY-L2 series PWR_ON input is equipped with an internal active pull-up resistor to the VCC module supply:  the  PWR_ON input voltage thresholds are  different  from the  other  generic digital interfaces. Detailed electrical characteristics are described in TOBY-L2 series Data Sheet [1].  Baseband Processor20PWR_ONTOBY-L2 seriesVCCPower-onPower ManagementPower-on50k Figure 13: TOBY-L2 series PWR_ON input description   For more pin information and electrical characteristics, see the TOBY-L2 Data Sheet [1] and MPCI-L2 Data Sheet [2].
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 30 of 141 Figure 14 shows the module power-on sequence from the not-powered mode, describing the following phases:  The external supply is applied to the VCC or 3.3Vaux module supply inputs, representing the start-up event.  The PWR_ON and the RESET_N or PERST# pins suddenly rise to high logic level due to internal pull-ups.  The V_BCKP RTC supply output is suddenly enabled by the module as VCC reaches a valid voltage value.  All the generic digital pins of the module are tri-stated until the switch-on of their supply source (V_INT).  The internal reset signal  is held low: the  baseband core and all the digital pins  are held in the reset state.  The reset state of all the digital pins is reported in the pin description table of TOBY-L2 Series Data Sheet [1].  When the internal reset signal is released, any digital pin is set in a proper sequence from the reset state to the default operational configured state. The duration of this pins’ configuration phase differs within generic digital interfaces and the USB interface due to host / device enumeration timings (see section 1.9.1).  The module is fully ready to operate after all interfaces are configured.   VCC or 3.3VauxV_BCKPPWR_ONRESET_N or PERST#V_INTInternal ResetSystem StateBB Pads StateInternal Reset → Operational OperationalTristate / Floating Internal ResetOFFON0 ms~10 ms~20 sStart of interface configurationModule interfaces are configuredStart-up event~5 ms Figure 14: TOBY-L2 and MPCI-L2 series power-on sequence description   The Internal Reset signal is not available on a module pin, but the host application can monitor:  The V_INT pin to sense the start of the TOBY-L2 module power-on sequence.  The USB interface to sense the start of the MPCI-L2 module power-on sequence: the module, as USB device,  informs  the  host  of  the  attach  event  via  a  reply  on  its  status  change  pipe  for  proper  bus enumeration process according to Universal Serial Bus Revision 2.0 specification [6].  Before  the  switch-on  of  the  generic  digital  interface  supply  source  (V_INT)  of  the  module,  no  voltage driven by an external application should be applied to any generic digital interface of TOBY-L2 module.  Before the TOBY-L2 and MPCI-L2 series module is fully ready to operate, the  host application processor should not send any AT command over the AT communication interfaces (USB, UART) of the module.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 31 of 141 1.6.2 Module power-off TOBY-L2 series can be properly switched off by:  AT+CPWROFF command (see u-blox AT Commands Manual [3]). The current parameter settings are saved in the module’s non-volatile memory and a proper network detach is performed.   The MPCI-L2 series modules do not switch off by the AT+CPWROFF command as the TOBY-L2 modules, but  the  AT+CPWROFF  command  causes  a  reset  (reboot)  of  the  module  due  to  the  MPCI-L2  module’s internal configuration: the command stores the actual parameter settings in the non-volatile memory of MPCI-L2 modules and performs a network detach, with a subsequent reset (reboot) of the module.  An abrupt under-voltage shutdown occurs on TOBY-L2 and MPCI-L2 series modules when the VCC or 3.3Vaux module  supply  is  removed.  If  this  occurs,  it  is  not  possible  to  perform  the  storing  of  the  current  parameter settings in the module’s non-volatile memory or to perform the proper network detach.   It is highly recommended to avoid an abrupt removal of the VCC supply during TOBY-L2 modules normal operations:  the  power  off  procedure  must  be  started  by  the  AT+CPWROFF  command,  waiting  the command response for a proper time period (see  u-blox AT Commands Manual [3]), and then a proper VCC  supply  has  to  be  held  at  least  until  the  end  of  the  modules’  internal  power  off  sequence,  which occurs when the generic digital interfaces supply output (V_INT) is switched off by the module.  It  is  highly  recommended  to  avoid  an  abrupt  removal  of  the  3.3Vaux  supply  during  MPCI-L2  modules normal operations: the power off  procedure must be started by setting the MPCI-L2 module in the halt mode  by  the  AT+CFUN=127  command  (which  stores  the  actual  parameter  settings  in  the  non-volatile memory  of  the  module  and  performs  a  network  detach),  waiting  the  command  response  for  a  proper time period (see the u-blox AT Commands Manual [3]), and then the 3.3Vaux supply can be removed.  An abrupt hardware shutdown occurs on TOBY-L2 series modules when a low level is applied on the RESET_N pin  for  a  specific  time  period.  In  this  case,  the  current  parameter  settings  are  not  saved  in  the  module’s non-volatile memory and a proper network detach is not performed.   It is highly recommended to avoid an abrupt hardware shutdown of the module by forcing a low level on the RESET_N input pin during module normal operation: the RESET_N line should be set low only if reset or shutdown via AT commands fails or if the module does not reply to a specific AT command after a time period longer than the one defined in the u-blox AT Commands Manual [3].  An over-temperature or an under-temperature shutdown occurs on TOBY-L2 and MPCI-L2 series modules when the  temperature  measured  within  the  cellular  module  reaches  the  dangerous  area,  if  the  optional  Smart Temperature Supervisor feature is enabled and configured by the dedicated AT command. For more details  see u-blox AT Commands Manual [3], +USTS AT command.   The  Smart Temperature Supervisor feature is  not  supported  by  the  TOBY-L2x0-00S  and  MPCI-L2x0-00S product versions.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 32 of 141 Figure 15 describes the TOBY-L2 power-off sequence by means of AT+CPWROFF with the following phases:  When the +CPWROFF AT command is sent, the module starts the switch-off routine.  The module replies OK on the AT interface: the switch-off routine is in progress.   At the end of the switch-off routine, all the digital pins are tri-stated and all the internal voltage regulators are turned off, including the generic digital interfaces supply (V_INT), except the RTC supply (V_BCKP).  Then, the module remains in power-off mode as long as a switch on event does not occur (e.g. applying a proper low level to the PWR_ON input, or applying a proper low level to the RESET_N input), and enters not-powered mode if the supply is removed from the VCC pins.  VCC V_BCKPPWR_ONRESET_N V_INTInternal ResetSystem StateBB Pads State OperationalOFFTristate / FloatingONOperational → TristateAT+CPWROFFsent to the module0 s~2.5 s~5 sOKreplied by the moduleVCC                can be removed Figure 15: TOBY-L2 series power-off sequence description  The Internal Reset signal is not available on a module pin, but the application can monitor the V_INT pin to sense the end of the power-off sequence.  Figure 16 describes the MPCI-L2 power-off procedure with the following phases:  When the AT+CFUN=127 command is issued, the module starts the halt mode setting routine.  The module replies OK on the AT interface: after this, the module is set in the halt mode.  Then, the module remains in the Halt mode and enters not-powered mode if the supply is removed from the 3.3Vaux pins.  3.3VauxPERST#Internal ResetSystem StateBB Pads StateOFFONTristate / FloatingOperationalAT+CFUN=127sent to the module0 s~2.5 s~5 sOKreplied by the module3.3Vaux         can be removed Figure 16: MPCI-L2 series power-off procedure description  The duration of each phase in the TOBY-L2 and MPCI-L2 series modules’ switch-off routines can largely vary depending on the application / network settings and the concurrent module activities.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 33 of 141 1.6.3 Module reset TOBY-L2 and MPCI-L2 series modules can be properly reset (rebooted) by:  AT+CFUN command (see u-blox AT Commands Manual [3]). MPCI-L2 series modules can be additionally properly reset (rebooted) by:  AT+CPWROFF command (see u-blox AT Commands Manual [3]): the behavior differs than TOBY-L2 series, as MPCI-L2 modules will reboot rather than remain switched off due to modules’ internal configuration. In the  cases listed  above  an  “internal”  or  “software”  reset of  the  module  is  executed:  the  current  parameter settings are saved in the module’s non-volatile memory and a proper network detach is performed.  An abrupt hardware reset occurs on  TOBY-L2 and MPCI-L2 series modules when a low level is applied on the RESET_N  or  PERST#  input  pin  for  a  specific  time  period.  In this  case,  the  current  parameter  settings are  not saved in the module’s non-volatile memory and a proper network detach is not performed.   It is highly recommended to avoid an abrupt hardware reset of the module by forcing a low level on the RESET_N or PERST# input during modules normal operation: the RESET_N or PERST# line should be set low only if reset or shutdown via AT commands fails or if the module does not provide a reply to a specific AT command after a time period longer than the one defined in the u-blox AT Commands Manual [3].  As described  in  Figure  17,  the  RESET_N  and  PERST#  input pins  are  equipped  with  an  internal  pull-up to the VCC supply in the TOBY-L2 series and to the 3.3 V in the MPCI-L2 series.  Baseband Processor23RESET_NTOBY-L2 seriesVCCResetPower ManagementReset50kBaseband Processor22PERST#MPCI-L2 seriesResetPower ManagementReset45k3.3 V Figure 17: TOBY-L2 and MPCI-L2 series RESET_N and PERST# input equivalent circuit description  For more electrical characteristics details see TOBY-L2 Data Sheet [1] and MPCI-L2 Data Sheet [2].  1.6.4 Module configuration selection by host processor  The HOST_SELECT0 and HOST_SELECT1 pins are not available on MPCI-L2 series modules.  The functionality of the HOST_SELECT0 and HOST_SELECT1 pins is not supported by TOBY-L2x0-00S.  TOBY-L2 series modules include two input pins (HOST_SELECT0 and HOST_SELECT1) for the selection of the module configuration by the host application processor.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 34 of 141 1.7 Antenna interface 1.7.1 Antenna RF interfaces (ANT1 / ANT2) TOBY-L2 and MPCI-L2 series modules provide two RF interfaces for connecting the external antennas:  The ANT1 represents the primary RF input/output for transmission and reception of LTE/3G/2G RF signals.  The  ANT1  pin  of  TOBY-L2  series  modules  has  a  nominal  characteristic  impedance  of  50   and  must  be connected to the primary Tx / Rx antenna through a 50  transmission line to allow proper RF transmission and reception. The  ANT1  Hirose  U.FL-R-SMT  coaxial  connector  receptacle  of  MPCI-L2  series  modules  has  a  nominal characteristic impedance of 50  and must be connected to the primary Tx / Rx antenna through a mated RF plug with a 50  coaxial cable assembly to allow proper RF transmission and reception.  The  ANT2  represents  the  secondary  RF  input  for  the  reception  of  the  LTE  RF  signals  for  the  Down-Link MIMO 2 x 2 radio technology supported by TOBY-L2 and MPCI-L2 series modules as required feature for LTE category 4 UEs, and for the reception of the 3G RF signals for the Down-Link Rx diversity radio technology supported by TOBY-L2 and MPCI-L2 series modules as additional feature for 3G DC-HSDPA category 24 UEs.  The  ANT2  pin  of  TOBY-L2  series  modules  has  a  nominal  characteristic  impedance  of  50   and  must  be connected to the secondary Rx antenna through a 50  transmission line to allow proper RF reception. The  ANT2  Hirose  U.FL-R-SMT  coaxial  connector  receptacle  of  MPCI-L2  series  modules  has  a  nominal characteristic impedance of 50  and must be connected to the secondary Rx antenna through a mated RF plug with a 50  coaxial cable assembly to allow proper RF reception.  The  Multiple  Input  Multiple  Output  (MIMO)  radio  technology  is  an  essential  component  of  LTE  radio  systems based  on  the  use  of  multiple  antennas  at  both  the  transmitter  and  receiver  sides  to  improve  communication performance and achieve highest possible bit rate. A MIMO m x n system consists of m transmit and n receive antennas,  where the  data  to be  transmitted  is  divided into m independent  data streams.  Note  that the  terms Input and Output refer to the radio channel carrying the signal, not to the devices having antennas, so that in the Down-Link MIMO 2 x 2 system supported by TOBY-L2 and MPCI-L2 series modules:  The LTE data stream is divided into 2 independent streams by the Tx-antennas of the base station  The cellular modules, at the receiver side, receives both LTE data streams by 2 Rx-antennas (ANT1 / ANT2)  Base StationTx-1 AntennaTx-2 AntennaTOBY-L2 seriesMPCI-L2 seriesANT1Rx-1 AntennaANT2Rx-2 AntennaData Stream 1Data Stream 2 Figure 18: Description of the LTE Down-Link MIMO 2 x 2 radio technology supported by TOBY-L2 and MPCI-L2 series modules TOBY-L2 and MPCI-L2 series modules support the LTE MIMO 2 x 2 radio technology in the Down-Link path only (from the base station to the module): the ANT1 port is the only one RF interface that is used by the module to transmit the RF signal in the Up-Link path (from the module to the base station).
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 35 of 141 1.7.1.1 Antenna RF interfaces requirements Table 8, Table 9 and Table 10 summarize the requirements for the antennas RF interfaces (ANT1 / ANT2). See section 2.4.1 for suggestions to properly design antennas circuits compliant with these requirements.   The  antenna  circuits  affect  the  RF  compliance  of  the  device  integrating  TOBY-L2  and  MPCI-L2 series  modules  with  applicable  required  certification  schemes  (for more  details  see  section  4). Compliance is guaranteed if the antenna RF interfaces (ANT1 / ANT2) requirements summarized in Table 8, Table 9 and Table 10 are fulfilled.  Item Requirements Remarks Impedance  50  nominal characteristic impedance The impedance of the antenna RF connection must match the 50  impedance of the ANT1 port. Frequency Range See  the  TOBY-L2  series  Data  Sheet [1]  and  the MPCI-L2 series Data Sheet [2] The required frequency range of the antenna connected to ANT1 port depends on the operating bands of the used cellular module and the used mobile network. Return Loss S11 < -10 dB (VSWR < 2:1) recommended S11 < -6 dB (VSWR < 3:1) acceptable The Return loss or the S11, as the VSWR, refers to the amount of reflected power, measuring how well the primary antenna RF connection matches the 50  characteristic impedance of the ANT1 port. The impedance of the antenna termination must match as much as possible the 50  nominal impedance of the ANT1 port over the operating frequency range, reducing as much as possible the amount of reflected power. Efficiency > -1.5 dB ( > 70% ) recommended > -3.0 dB ( > 50% ) acceptable The radiation efficiency is the ratio of the radiated power to the power delivered to antenna input: the efficiency is a measure of how well an antenna receives or transmits. The radiation efficiency of the antenna connected to the ANT1 port needs to be enough high over the operating frequency range to comply with the Over-The-Air (OTA) radiated performance requirements, as Total Radiated Power (TRP) and the Total Isotropic Sensitivity (TIS), specified by applicable related certification schemes. Maximum Gain  According to radiation exposure limits The power gain of an antenna is the radiation efficiency multiplied by the directivity: the gain describes how much power is transmitted in the direction of peak radiation to that of an isotropic source.  The maximum gain of the antenna connected to ANT1 port must not exceed the herein stated value to comply with regulatory agencies radiation exposure limits. For additional info see the section 4.2.2. Input Power  > 33 dBm ( > 2 W ) The antenna connected to the ANT1 port must support with adequate margin the maximum power transmitted by the modules. Table 8: Summary of primary Tx/Rx antenna RF interface (ANT1) requirements
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 36 of 141 Item Requirements Remarks Impedance  50  nominal characteristic impedance The impedance of the antenna RF connection must match the 50  impedance of the ANT2 port. Frequency Range  See  the  TOBY-L2  series  Data  Sheet [1]  and  the MPCI-L2 series Data Sheet [2] The required frequency range of the antennas connected to ANT2 port depends on the operating bands of the used cellular module and the used Mobile Network. Return Loss S11 < -10 dB (VSWR < 2:1) recommended S11 < -6 dB (VSWR < 3:1) acceptable The Return loss or the S11, as the VSWR, refers to the amount of reflected power, measuring how well the secondary antenna RF connection matches the 50  characteristic impedance of the ANT2 port. The impedance of the antenna termination must match as much as possible the 50  nominal impedance of the ANT2 port over the operating frequency range, reducing as much as possible the amount of reflected power. Efficiency > -1.5 dB ( > 70% ) recommended > -3.0 dB ( > 50% ) acceptable The radiation efficiency is the ratio of the radiated power to the power delivered to antenna input: the efficiency is a measure of how well an antenna receives or transmits. The radiation efficiency of the antenna connected to the ANT2 port needs to be enough high over the operating frequency range to comply with the Over-The-Air (OTA) radiated performance requirements, as the TIS, specified by applicable related certification schemes. Table 9: Summary of secondary Rx antenna RF interface (ANT2) requirements  Item Requirements Remarks Efficiency imbalance  < 0.5 dB recommended < 1.0 dB acceptable The radiation efficiency imbalance is the ratio of the primary (ANT1) antenna efficiency to the secondary (ANT2) antenna efficiency: the efficiency imbalance is a measure of how much better an antenna receives or transmits compared to the other antenna. The radiation efficiency of the secondary antenna needs to be roughly the same of the radiation efficiency of the primary antenna for good RF performance. Envelope Correlation Coefficient  < 0.4 recommended < 0.5 acceptable The Envelope Correlation Coefficient (ECC) between the primary (ANT1) and the secondary (ANT2) antenna is an indicator of 3D radiation pattern similarity between the two antennas: low ECC results from antenna patterns with radiation lobes in different directions. The ECC between primary and secondary antenna needs to be enough low to comply with radiated performance requirements specified by related certification schemes. Isolation  > 15 dB recommended > 10 dB acceptable The antenna to antenna isolation is the loss between the primary (ANT1) and the secondary (ANT2) antenna: high isolation results from low coupled antennas. The isolation between primary and secondary antenna needs to be high for good RF performance. Table 10: Summary of primary (ANT1) and secondary (ANT2) antennas relationship requirements
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 37 of 141 1.7.2 Antenna detection interface (ANT_DET)  Antenna detection interface (ANT_DET) is not available on MPCI-L2 series modules.  Antenna detection interface (ANT_DET) is not supported by the TOBY-L2x0-00S product version.  The  antenna  detection  is  based  on  ADC  measurement.  The  ANT_DET  pin  is  an  Analog  to  Digital  Converter (ADC) provided to sense the antenna presence. The antenna detection function provided by ANT_DET pin is an optional feature that can be implemented if the application  requires  it.  The  antenna  detection  is  forced  by  the  +UANTR  AT  command.  See  the  u-blox  AT Commands Manual [3] for more details on this feature. The ANT_DET pin generates a DC current (for detailed characteristics see the TOBY-L2 series Data Sheet [1]) and measures the resulting DC voltage, thus determining the resistance from the antenna connector provided on the application board to GND. So, the requirements to achieve antenna detection functionality are the following:  an RF antenna assembly with a built-in resistor (diagnostic circuit) must be used  an antenna detection circuit must be implemented on the application board See section 2.4.2 for antenna detection circuit on application board and diagnostic circuit on antenna assembly design-in guidelines.  1.8 SIM interface 1.8.1 SIM interface TOBY-L2  and MPCI-L2 series  modules provide high-speed SIM/ME interface  including automatic detection  and configuration of the voltage required by the connected SIM card or chip. Both 1.8  V and 3  V SIM types are  supported.  Activation  and deactivation with automatic voltage  switch from 1.8 V  to  3  V  are  implemented,  according  to  ISO-IEC  7816-3  specifications.  The  VSIM  or  UIM_PWR  supply output provides internal short circuit protection to limit start-up current and protect the SIM to short circuits. The SIM driver supports the PPS (Protocol and Parameter Selection) procedure for baud-rate selection, according to the values determined by the SIM card or chip.  1.8.2 SIM detection interface  SIM detection interface (GPIO5) is not available on MPCI-L2 series modules.  SIM detection interface (GPIO5) is not supported by the TOBY-L2x0-00S product version.  The  GPIO5  pin  is  by  default  configured  to  detect  the  SIM  card  mechanical  /  physical  presence.  The  pin  is configured  as  input  with  an  internal  active  pull-down  enabled,  and  it  can  sense  SIM  card  presence  only  if properly connected to the mechanical switch of a SIM card holder as described in section 2.5:  Low logic level at GPIO5 input pin is recognized as SIM card not present  High logic level at GPIO5 input pin is recognized as SIM card present The SIM card detection function provided by GPIO5 pin is an optional feature that can be implemented / used or not  according  to  the  application  requirements:  an  Unsolicited  Result  Code  (URC)  is  generated  each  time  that there is a change of status (for more details see the u-blox AT Commands Manual [3]). The optional function “SIM card hot insertion/removal” can be additionally enabled on the GPIO5 pin by specific AT command (see the u-blox AT Commands Manual [3]).
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 38 of 141 1.9 Data communication interfaces TOBY-L2 and MPCI-L2 series modules provide the following serial communication interface:  USB  interface:  High-Speed  USB  2.0  compliant  interface  available  for  the  communication  with  an  external host  application  processor,  for  AT  commands,  data  communication,  FW  upgrade  by  means  of  the  FOAT feature, FW upgrade by means of the u-blox EasyFlash tool and for diagnostic purpose (see section 1.9.1 for functional description) TOBY-L2 series modules additionally provide the following serial communication interfaces:  UART  interface:  asynchronous  serial  interface  available  for  the  communication  with  an  external  host application processor, for AT commands, data communication, FW upgrade by means of the FOAT feature (see section 1.9.2 for functional description)  DDC interface: I2C bus compatible interface available for the communication with u-blox GNSS positioning chips/modules and with external I2C devices as an audio codec (see section 1.9.3 for functional description)  SDIO interface: Secure Digital Input Output interface available for the communication with an external Wi-Fi chip or module (see section 1.9.4 for functional description)  1.9.1 Universal Serial Bus (USB) 1.9.1.1 USB features TOBY-L2  and  MPCI-L2  series  modules  include  a  High-Speed  USB  2.0  compliant  interface  with  maximum  data rate  of  480 Mb/s,  representing  the  main  interface  for  transferring  high  speed  data  with  a  host  application processor: the USB interface is available for AT commands, data communication, FW upgrade by means of the FOAT feature, FW upgrade by means of the u-blox EasyFlash tool and for diagnostic purpose.The module itself acts  as  a  USB  device  and  can  be  connected  to  a  USB  host  such  as  a  Personal  Computer  or  an  embedded application microprocessor equipped with compatible drivers. The USB_D+ / USB_D- lines carry the USB serial bus data and signaling, providing all the functionalities for the bus attachment, configuration, enumeration, suspension or remote wakeup according to the Universal Serial Bus Revision 2.0 specification [6] The additional VUSB_DET input pin is available on TOBY-L2 series modules as optional feature to sense the USB VBUS supply (5.0 V typical) from the host, providing the complete bus detach functionality for further reduction of  the  module  current  consumption  in  particular  during  low-power  idle  mode  with  power  saving  enabled: TOBY-L2 series modules disable the USB interface when a low logic level is sensed after a high-to-low logic level transition on the VUSB_DET input pin, reducing the current consumption.   The VUSB_DET pin is not available on MPCI-L2 series modules.  The USB interface is controlled and operated with:  AT commands according to 3GPP TS 27.007 [8], 3GPP TS 27.005 [9], 3GPP TS 27.010 [10]  u-blox AT commands   For the complete list of supported AT commands and their syntax see u-blox AT Commands Manual [3].
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 39 of 141 TOBY-L2 and MPCI-L2 modules provide by default the following USB profile with the listed set of USB functions:  1 RNDIS for Ethernet-over-USB connection  1 CDC-ACM for AT commands and data communication  The  USB  profile of TOBY-L2  and MPCI-L2  modules  identifies itself  by  its VID  (Vendor ID)  and  PID (Product  ID) combination, included in the USB device descriptor according to the USB 2.0 specifications [6]. The VID and PID of the default USB profile configuration with the set of functions described above (1 RNDIS for Ethernet-over-USB and 1 CDC-ACM for AT commands and data) are the following:  VID = 0x1546  PID = 0x1146  Figure 19 summarizes the USB end-points available with the default USB profile configuration.   Default profile configurationInterface 0 Wireless Controller –Remote NDISInterface 1 Communication DataEndPoint Transfer: InterruptEndPoint Transfer: BulkEndPoint Transfer: BulkInterface 2 Communication Control –AT commandsEndPoint Transfer: InterruptInterface 3 Communication DataEndPoint Transfer: BulkEndPoint Transfer: BulkFunction RNDISFunction CDC Serial Figure 19: TOBY-L2 and MPCI-L2 series USB End-Points summary for the default USB profile configuration  The USB of the modules can be configured by the AT+UUSBCONF command (for more details see the u-blox AT Commands Manual [3]) to select different sets of USB functions available in mutually exclusive way, selecting the active USB profile consisting of a specific set of functions with various capabilities and purposes, such as:  CDC-ACM for AT commands and data  CDC-ACM for GNSS tunneling  CDC-ACM for SIM Access Profile (SAP)  CDC-ACM for diagnostic   RNDIS for Ethernet-over-USB  CDC-ECM for Ethernet-over-USB  CDC-NCM for Ethernet-over-USB  MBIM for Ethernet-over-USB   CDC-ACM  for  GNSS  tunneling,  CDC-ACM  for  SIM  Access  Profile  (SAP),  and  CDC-NCM  and  MBIM functions are not supported by the TOBY-L2x0-00S and MPCI-L2x0-00S product versions.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 40 of 141 For example, the default  USB profile configuration which  provides  2  functions  (1 RNDIS for Ethernet-over-USB and  1  CDC-ACM  for  AT  commands  and  data)  can  be  changed  by  means  of  the  AT+UUSBCONF  command switching to a USB profile configuration which provides the following 6 functions:  3 CDC-ACM for AT commands and data  1 CDC-ACM for GNSS tunneling  1 CDC-ACM for SIM Access Profile (SAP)  1 CDC-ACM for diagnostic  As each USB  profile  of TOBY-L2 and MPCI-L2 modules  identifies itself by  its  specific VID  and PID combination included in the USB device descriptor according to the  USB 2.0 specifications [6], the VID and PID combination changes as following by switching the active USB profile configuration to the set of 6 functions described above:  VID = 0x1546  PID = 0x1141  Alternatively,  as  another  example,  the  USB  profile  configuration  can  be  changed  by  means  of  the AT+UUSBCONF command switching to a USB profile configuration which provides the following 4 functions:  1 CDC-ECM for Ethernet-over-USB   3 CDC-ACM for AT commands and data In case of this USB profile with the set of 4 functions described above, the VID and PID are the following:  VID = 0x1546  PID = 0x1143  The  switch  of  the  active  USB  profile  selected by  the  AT+UUSBCONF  command  is  not  performed  immediately. The settings are saved in the non-volatile memory of the module at the power off, and the new configuration is effective at the subsequent reboot of the module.  If the USB is connected to the host before the module is switched on, or if the module is reset (rebooted) with the USB connected to the host, the VID and PID are automatically updated during the boot of the module. First, VID and PID are the following:  VID = 0x1546  PID = 0x1140 This VID  and PID combination  identifies  a USB profile where  no USB function described above  is available:  AT commands must not be sent to the module over the USB profile identified by this VID and PID combination. Then, after a time period (roughly 20 s, depending on the host / device enumeration timings), the VID and PID are updated to the ones related to the USB profile selected by the AT+UUSBCONF command.   For more details regarding the TOBY-L2 and MPCI-L2 series modules USB configurations and capabilities, see the u-blox AT Commands Manual [3], +UUSBCONF AT command.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 41 of 141 1.9.1.2 USB in Windows The USB drivers (INF files) are provided for Windows systems and should be installed properly by following the step-by-step instruction in EVK-L20 / EVK-L21 User Guide [4]. USB drivers are available for the following operating system platforms:  Windows Vista  Windows 7  Windows 8  Windows 8.1  Windows Embedded Compact 7 The module firmware can be upgraded over the USB interface by means of the FOAT feature, or using the u-blox EasyFlash tool (for more details see Firmware Update Application Note [4]).  1.9.1.3 USB in Linux/Android It is not required to install a specific driver for each Linux-based or Android-based operating system (OS) to use the module USB interface, which is compatible with standard Linux/Android USB kernel drivers. The full capability  and  configuration of the module  USB  interface can be reported by  running ‘lsusb  –v’  or  an equivalent command available in the host operating system when the module is connected.  1.9.1.4 USB and power saving If power saving is enabled by the AT+UPSV command, the modules automatically enter the USB suspended state when the device has observed no bus traffic for a specific time period according to the USB 2.0 specification [6]. In suspended state, the module maintains any USB internal status as device. In addition, the module enters the suspended state when the hub port it is attached to is disabled. This is referred to as USB selective suspend. The  module  exits  suspend  mode  when  there  is  bus  activity.  If  the  USB  is  connected  and  not  suspended,  the module is forced to stay in active-mode, therefore the AT+UPSV settings are overruled but they have effect on the power saving configuration of the other interfaces. The modules are capable of USB remote wake-up signaling: i.e. it may request the host to exit suspend mode or selective suspend  by using  electrical signaling to indicate remote wake-up. This notifies the host that it should resume from its suspended mode, if necessary, and service the external event. Remote wake-up is accomplished using electrical signaling described in the USB 2.0 specifications [6]. For the module current consumption description with power saving enabled and USB suspended, or with power saving disabled and USB not suspended, see the sections 1.5.1.5, 1.5.1.6 and the TOBY-L2 Data Sheet [1] or the MPCI-L2 Data Sheet [2]. The  additional  VUSB_DET  input  pin  available  on  TOBY-L2  series  modules  provides  the  complete  bus  detach functionality: the modules disable the USB  interface  when a low logic  level is sensed after  a high-to-low logic level transition on the VUSB_DET input pin. This allows a further reduction of the module current consumption, in particular as compared to the USB suspended status during low-power idle mode with power saving enabled.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 42 of 141 1.9.2 Asynchronous serial interface (UART)  The UART interface is not available on MPCI-L2 series modules.  The UART interface is not supported by the TOBY-L2x0-00S product version.  1.9.2.1 UART features The UART interface is a 9-wire 1.8 V unbalanced asynchronous serial interface (UART) that can be connected to an application host processor for AT commands and data communication. The  module  firmware  can  be  upgraded  over  the  UART  interface  by  means  of  the  Firmware  upgrade  over  AT (FOAT) feature only: for more details see section 1.15 and Firmware update application note [4]. UART  interface  provides  RS-232  functionality  conforming  to  the  ITU-T  V.24  Recommendation  (more  details available in ITU Recommendation [7]), with CMOS compatible signal levels: 0 V for low data bit or ON state, and 1.8 V for high data bit or OFF state. For detailed electrical characteristics see TOBY-L2 Data Sheet [1]. TOBY-L2  modules  are  designed  to  operate  as  LTE/3G/2G  cellular  modems,  i.e.  the  data  circuit-terminating equipment  (DCE)  is  according  to  the  ITU-T  V.24  Recommendation [7].  A  customer  application  processor connected to the module through the UART interface represents the data terminal equipment (DTE).   The  signal  names  of  the  UART  interface  of  the  TOBY-L2  series  modules  conform  to  the  ITU-T  V.24 Recommendation [7]: e.g. TXD line represents the data transmitted by the DTE (application processor data output) and received by the DCE (module data input).  The UART interface is controlled and operated with:  AT commands according to 3GPP TS 27.007 [8], 3GPP TS 27.005 [9], 3GPP TS 27.010 [10]  u-blox AT commands   For the complete list of supported AT commands and their syntax see u-blox AT Commands Manual [3].  1.9.2.2 UART interface configuration The  UART  interface  of  TOBY-L2  series  modules  is  configured  as  described  in  Table  11  (for  information  about further settings, see the u-blox AT Commands Manual [3]).  Interface AT Settings Comments UART interface AT interface: enabled AT command interface is enabled by default on the UART physical interface  MUX protocol: disabled Multiplexing mode is disabled by default and it can be enabled by AT+CMUX command. For more details, see the Mux Implementation Application Note [11]. The following virtual channels are defined:  Channel 0: Control channel  Channel 1 – 5: AT commands / data connection  Channel 6: GNSS tunneling   Channel 7: SIM Access Profile  Table 11: Default UART interface configuration
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 43 of 141 1.9.2.3 UART signals behavior At  the  module  switch-on,  before  the  UART  interface  initialization  (as  described  in  the  power-on  sequence reported in Figure 14), each pin is first tri-stated and then is set to its relative internal reset state. At the end of the  boot  sequence,  the  UART  interface  is  initialized,  the  module  is  by  default  in  active-mode,  and  the  UART interface is enabled. 1.9.2.4 UART and power-saving  The power saving configuration is controlled by the AT+UPSV command (for the complete description,  see the u-blox AT Commands Manual [3]). When power saving is enabled, the module automatically enters low power idle-mode whenever possible, and otherwise the active-mode is maintained by the module (see section  1.4 for definition and description of module operating modes referred to in this section). The AT+UPSV command configures both the module power saving and also the UART behavior in relation to the power saving. The  conditions for  the  module entering  low power idle-mode  also  depend  on the UART power saving configuration, as the module does not enter the low power idle-mode according to any required activity related to the network (within or outside an active call) or any other required concurrent activity related to the functions and interfaces of the module, including the UART interface. 1.9.2.5 UART multiplexer protocol TOBY-L2 series modules have a software layer with multiplexer functionality as per  3GPP TS 27.010 Multiplexer Protocol [10], available on the UART physical link.  This  is  a  data  link  protocol  (layer  2  of  OSI  model)  which  uses  HDLC-like  framing  and  operates  between  the module (DCE) and the application processor (DTE) and allows a number of simultaneous sessions over the used physical link (the  UART  interface):  the  user can concurrently use AT command  interface  on one MUX channel and data communication on another multiplexer channel.  The following virtual channels are defined:  Channel 0: control channel  Channel 1 – 5: AT commands / data connection  Channel 6: GNSS tunneling  Channel 7: SIM Access Profile For more details, see Mux implementation Application Note [11].
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 44 of 141 1.9.3 DDC (I2C) interface  The I2C bus compatible Display Data Channel interface is not available on the MPCI-L2 series modules, as AssistNow embedded  GNSS  positioning  aiding,  CellLocate® positioning  through  cellular information and custom functions over GPIOs for the integration with u-blox positioning chips / modules.  The I2C bus compatible  Display  Data  Channel interface is  not supported by  the  TOBY-L2x0-00S product version,  as  AssistNow  embedded  GNSS  positioning  aiding,  CellLocate®  positioning  through  cellular information and custom functions over GPIOs for the integration with u-blox positioning chips / modules.  The SDA and SCL pins of TOBY-L2 series modules represent an I2C bus compatible Display Data Channel (DDC) interface for the communication with u-blox GNSS receivers and with other external I2C devices as audio codecs: an I2C master can communicate with more I2C slaves in accordance to the I2C bus specifications [12]. The DDC (I2C) interface is the only one interface dedicated for communication between u-blox cellular module and u-blox positioning receivers. The AT commands interface is not available on the DDC (I2C) interface. The DDC (I2C) interface pads of the module, serial data (SDA) and serial clock (SCL), are open drain output and external pull up resistors must be used conforming to the I2C bus specifications [12].  u-blox has implemented special features in the cellular modules to ease the design effort for the integration of a u-blox cellular module with a u-blox GNSS receiver (details in GNSS Implementation Application Note [13]). Combining a u-blox cellular module with a u-blox GNSS receiver allows designers to full access the GNSS receiver directly  via  the  cellular  module:  it  relays  control  messages  to  the  GNSS  receiver  via  a  dedicated  DDC  (I2C) interface. A 2nd interface connected to the GNSS receiver is not necessary: AT commands via the AT interfaces of the cellular module (UART, USB) allows a full control of the GNSS receiver from any host processor. u-blox cellular modules feature embedded GNSS aiding that is a set of specific features developed by u-blox to enhance  GNSS  performance,  decreasing  Time  To  First  Fix  (TTFF),  thus  allowing  to  calculate  the  position  in  a shorter time with higher accuracy.  Additional custom functions over GPIO pins are designed to improve the integration with u-blox GNSS receivers:  GNSS receiver power-on/off: “GNSS supply enable” function over the GPIO2 pin improves the positioning receiver power consumption. When the  GNSS functionality is not required, the positioning receiver can be completely switched off by the cellular module controlled by the application processor over AT commands  The wake up from idle-mode when the GNSS receiver is ready to send data: “GNSS data ready” function over the GPIO3 pin improves the cellular module power consumption. When power saving is enabled in the cellular  module  by  the  AT+UPSV  command  and  the  GNSS  receiver  does  not  send  data  by  the  DDC  (I2C) interface,  the  module  automatically  enters  idle-mode  whenever  possible.  With  the  “GNSS  data  ready” function the GNSS receiver can indicate to the cellular module that it is ready to send data: the positioning receiver can wake up the cellular module to avoid data loss even if power saving is enabled.  The  RTC  synchronization  signal  to  the  GNSS  receiver:  “GNSS  RTC  sharing”  function  over  the  GPIO4  pin improves GNSS receiver performance, decreasing the Time To First Fix (TTFF), and thus allowing to calculate the position in a shorter time with higher accuracy. When GNSS local aiding is enabled, the cellular module automatically  uploads  data  such  as position,  time,  ephemeris, almanac,  health and  ionospheric  parameter from the positioning receiver into its local memory, and restores this to the GNSS receiver at the next power up of the positioning receiver
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 45 of 141 1.9.4 Secure Digital Input Output interface (SDIO)  Secure Digital Input Output interface is not available on MPCI-L2 series modules.  Secure Digital Input Output interface is not supported by the TOBY-L2x0-00S product version.  TOBY-L2  series modules include  a 4-bit Secure  Digital Input  Output  interface (SDIO_D0, SDIO_D1, SDIO_D2, SDIO_D3, SDIO_CLK, SDIO_CMD) designed to communicate with an external Wi-Fi chip.   1.10 Audio 1.10.1 Digital audio over I2S interface  Digital audio over I2S interface is not available on MPCI-L2 series modules.  Digital audio over I2S interface is not supported by the TOBY-L2x0-00S product version.  TOBY-L2 series modules include a 4-wire I2S digital audio interface (I2S_TXD, I2S_RXD, I2S_CLK, I2S_WA) that can be configured by AT command to transfer digital audio data with an external device as an audio codec (for more details see u-blox AT Commands Manual [3]).
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 46 of 141 1.11 General Purpose Input/Output  General Purpose Input / Output pins are not supported by the TOBY-L2x0-00S product version except for the Wireless Wide Area Network status indication configured on the GPIO1 pin.  General Purpose Input / Output pins are not available on MPCI-L2 series modules.  TOBY-L2  series  modules  include  14  pins  (GPIO1-GPIO6,  I2S_TXD,  I2S_RXD,  I2S_CLK,  I2S_WA,  DTR,  DSR, DCD, RI) that can be configured as General Purpose Input/Output or to provide custom functions via u-blox AT commands (see the u-blox AT Commands Manual [3]), as summarized in Table 12.  Function Description Default GPIO Configurable GPIOs Network status indication Network status: registered home network, registered roaming, data transmission, no service GPIO1 GPIO1 GNSS supply enable Enable/disable the supply of u-blox GNSS receiver connected to cellular module GPIO2 GPIO2 GNSS data ready Sense when u-blox GNSS receiver connected to the module is ready for sending data by the DDC (I2C) GPIO3 GPIO3 GNSS RTC sharing Real Time Clock synchronization signal to u-blox GNSS receiver connected to cellular module GPIO4 GPIO4 SIM card detection SIM card physical presence detection GPIO5 GPIO5 SIM card hot insertion/removal SIM card hot insertion/removal  -- GPIO5 I2S digital audio interface I2S digital audio interface I2S_RXD, I2S_TXD, I2S_CLK, I2S_WA I2S_RXD, I2S_TXD, I2S_CLK, I2S_WA 26 MHz clock output 26 MHz clock output for an external audio codec or an external Wi-Fi chip/module GPIO6 GPIO6 Wi-Fi enable Enable/disable the supply of the external Wi-Fi chip or module connected to the cellular module -- GPIO1, GPIO4, DSR Wi-Fi data ready Sense when the external Wi-Fi chip/module connected to the cellular module is ready for sending data by the SDIO, waking up the cellular module from low power idle mode -- GPIO3, DTR Wi-Fi reset Reset the external Wi-Fi chip or module connected to the cellular module -- GPIO3, DCD Wi-Fi power saving Enable/disable the low power mode of the external Wi-Fi chip/module connected to the cellular module -- GPIO2, RI 32 kHz clock output 32 kHz clock output for an external Wi-Fi chip or module -- GPIO4 Antenna tuning 4-bit tunable antenna control signals mapping the actual operating RF band over a 4-pin interface provided for the implementation of external antenna tuning solutions -- I2S_RXD, I2S_TXD, I2S_CLK, I2S_WA DSR, DTR, DCD, RI DSR UART data set ready output DSR DSR DTR UART data terminal ready input  DTR DTR DCD UART data carrier detect output DCD DCD RI UART ring indicator output RI RI General purpose input Input to sense high or low digital level -- All General purpose output Output to set the high or the low digital level -- All Pin disabled Tri-state with an internal active pull-down enabled -- All Table 12: TOBY-L2 series GPIO custom functions configuration
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 47 of 141 1.12 Mini PCIe specific signals (W_DISABLE#, LED_WWAN#)  Mini PCI Express specific signals (W_DISABLE#, LED_WWAN#) are not available on TOBY-L2 series.  MPCI-L2  series  modules  include  the  W_DISABLE#  active-low  input  signal  to  disable  the  radio  operations  as specified by the PCI Express Mini Card Electromechanical Specification [14]. As described in Figure 20, the W_DISABLE# input is equipped with an internal pull-up to the 3.3Vaux supply. The W_DISABLE# input detailed electrical characteristics are described in the MPCI-L2 series Data Sheet [2].  Baseband Processor20W_DISABLE#MPCI-L2 series3.3VauxW_DISABLE#22k Figure 20: MPCI-L2 series modules W_DISABLE# input circuit description  MPCI-L2 series modules include the  LED_WWAN# active-low open drain output to provide the Wireless Wide Area Network status indication as specified by the PCI Express Mini Card Electromechanical Specification [14].   For more electrical characteristics details see the MPCI-L2 Data Sheet [2].   1.13 Reserved pins (RSVD)  Pins reserved for future use, marked as RSVD, are not available on MPCI-L2 series.  TOBY-L2 series modules have pins reserved for future use, marked as RSVD: they can all be left unconnected on the application board, except the RSVD pin number 6 that must be externally connected to ground.   1.14 Not connected pins (NC)  Pins internally not connected, marked as NC, are not available on TOBY-L2 series.  MPCI-L2 series modules have pins internally not connected, marked as NC: they can be left unconnected or they can be connected on the application board according to any application requirement, given that none function is provided by the modules over these pins.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 48 of 141 1.15 System features 1.15.1 Network indication  Network  status  indication  over  GPIO1  is  not  available  on  MPCI-L2  series  modules  which  include  the LED_WWAN# active-low open drain output to provide the Wireless Wide Area Network status indication as specified by the PCI Express Mini Card Electromechanical Specification [14].  General Purpose Input / Output pins are not supported by the TOBY-L2x0-00S product version except for the Wireless Wide Area Network status indication configured on the GPIO1 pin.  The GPIO1 can be configured by the AT+UGPIOC command to indicate network status as described below:  No service (no network coverage or not registered)  Registered 2G / 3G / LTE home network  Registered 2G / 3G / LTE visitor network (roaming)  Call enabled (RF data transmission / reception) For the detailed description of the network status indication configuration, see u-blox AT Commands Manual [3], GPIO commands.  1.15.2 Antenna supervisor  Antenna supervisor (i.e. antenna detection) is not available on MPCI-L2 series.  Antenna supervisor (i.e. antenna detection) is not supported by the TOBY-L2x0-00S product version.  The  antenna  detection function provided  by  the  ANT_DET  pin  is  based on an  ADC  measurement  as  optional feature that can be implemented if the application requires it. The antenna  supervisor is forced by the +UANTR AT command (see the u-blox AT Commands Manual [3] for more details). The requirements to achieve antenna detection functionality are the following:  an RF antenna assembly with a built-in resistor (diagnostic circuit) must be used  an antenna detection circuit must be implemented on the application board See  section  1.7.2  for  detailed  antenna  detection  interface  functional  description  and  see  section  2.4.2  for detection circuit on application board and diagnostic circuit on antenna assembly design-in guidelines.  1.15.3 Jamming detection  Congestion detection (i.e. jamming detection) is not supported by TOBY-L2x0-00S and MPCI-L2x0-00S.  In  real  network  situations  modules  can  experience  various  kind  of  out-of-coverage  conditions:  limited  service conditions  when  roaming  to  networks  not  supporting  the  specific  SIM,  limited  service  in  cells  which  are  not suitable or barred due to operators’ choices, no cell condition when moving to poorly served or highly interfered areas. In the latter case, interference can be artificially injected in the environment by a noise generator covering a given spectrum, thus obscuring the operator’s carriers entitled to give access to the LTE/3G/2G service. The congestion (i.e. jamming) detection feature can be enabled and configured by the +UCD AT command: the feature  consists  of  detecting  an  anomalous  source  of  interference  and  signaling  the  start  and  stop  of  such conditions to the host application processor with an unsolicited indication, which can react appropriately by e.g. switching off the radio transceiver of the module (i.e. configuring the module in “airplane mode” by means of the +CFUN AT command) in order to reduce power consumption and monitoring the environment at constant periods (for more details see the u-blox AT Commands Manual [3]).
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 49 of 141 1.15.4 IP modes of operation IP modes of operation refer to the TOBY-L2 and MPCI-L2 series modules configuration related to the network IP termination and network interfaces settings in general. IP modes of operation are the following:  Bridge  mode:  In  bridge  mode  the  module  acts  as  a  cellular  modem  dongle  connected  to  the  host  over serial  interface  (USB).  The  IP  termination  of  the  network  is  placed  on  the  host  IP  stack.  The  module  is configured as a bridge which means the network IP address is assigned to the host (host IP termination).   Router mode: In router mode the module acts as a cellular modem router which means the IP termination of the network is placed on the internal IP stack of the module (on-target IP termination). In particular, in this  configuration the  application  processor  belongs to  a  private  network and  is  not  aware  of  the  mobile connectivity setup of the module. For more details about IP modes of operation see the u-blox AT Commands Manual [3].  1.15.5 Dual stack IPv4/IPv6 TOBY-L2 and MPCI-L2 series support both Internet Protocol version 4 and Internet Protocol version 6 in parallel. For more details about dual stack IPv4/IPv6 see the u-blox AT Commands Manual [3].  1.15.6 TCP/IP and UDP/IP  Embedded TCP/IP and UDP/IP stack as well as Direct Link mode are not supported by the TOBY-L2x0-00S and MPCI-L2x0-00S product versions.  TOBY-L2 and MPCI-L2 series modules provide embedded TCP/IP and UDP/IP protocol stack: a PDP context can be configured, established and handled via the data connection management packet switched data commands.  TOBY-L2  and  MPCI-L2  series  modules  provide  Direct  Link  mode  to  establish  a  transparent  end-to-end communication  with an  already  connected  TCP  or UDP  socket via  serial  interfaces (USB,  UART).  In  Direct  Link mode, data sent to the serial interface from an external application processor is forwarded to the network and vice-versa. For more details about embedded TCP/IP and UDP/IP functionalities see the u-blox AT Commands Manual [3].  1.15.7 FTP and FTPS  Embedded FTP and FTPS  services  as  well  as  Direct  Link mode  are not supported  by the TOBY-L2x0-00S and MPCI-L2x0-00S product versions.  TOBY-L2  and  MPCI-L2  series  provide  embedded  File  Transfer  Protocol  (FTP)  and  Secure  File  Transfer  Protocol (FTPS, i.e. FTP with SSL encryption) services. Files are read and stored in the local file system of the module. FTP files can also be transferred using FTP Direct Link:  FTP download: data coming from the FTP server is forwarded to the host processor via USB / UART serial interfaces (for FTP without Direct Link mode the data is always stored in the module’s Flash File System)  FTP  upload: data coming from the host processor via USB / UART serial interface is forwarded to the FTP server (for FTP without Direct Link mode the data is read from the module’s Flash File System) When Direct Link is used for a FTP file transfer, only the file content pass through  USB / UART serial interface, whereas all the FTP commands handling is managed internally by the FTP application. For more details about embedded FTP and FTPS functionalities see u-blox AT Commands Manual [3].
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 50 of 141 1.15.8 HTTP and HTTPS  Embedded HTTP and HTTPS services are not supported by TOBY-L2x0-00S and MPCI-L2x0-00S.  TOBY-L2 and MPCI-L2 series modules provide the embedded Hyper-Text Transfer Protocol (HTTP) and the Secure Hyper-Text Transfer Protocol (HTTPS, i.e. HTTP with TLS / SSL encryption) services via AT commands for sending requests to a remote HTTP server, receiving the server response and transparently storing it in the module’s Flash File System (FFS).  For more details about embedded HTTP and HTTPS functionalities see the u-blox AT Commands Manual [3].  1.15.9 SSL  Embedded Transport Layer Security (TLS) / Secure Sockets Layer (SSL) protocols are not supported by the TOBY-L2x0-00S and MPCI-L2x0-00S product versions.  TOBY-L2  and  MPCI-L2  series  modules  provide  the  Transport  Layer  Security  (TLS)  /  Secure  Sockets  Layer  (SSL) encryption protocols to enable security over the FTP and HTTP protocols via AT commands.  For more details about embedded TLS / SSL functionalities see the u-blox AT Commands Manual [3].  1.15.10 AssistNow clients and GNSS integration  AssistNow clients and u-blox GNSS receiver integration are not available on MPCI-L2 series.  AssistNow clients and u-blox GNSS receiver integration are not supported by TOBY-L2x0-00S.  For customers using u-blox GNSS receivers, TOBY-L2 series cellular modules feature embedded AssistNow clients. AssistNow A-GPS provides better GNSS performance and faster Time-To-First-Fix. The clients can be enabled and disabled with an AT command (see the u-blox AT Commands Manual [3]). TOBY-L2  series  cellular  modules  act  as  a  stand-alone  AssistNow  client,  making  AssistNow  available  with  no additional requirements for resources or software integration on an external host micro controller. Full access to u-blox GNSS receivers is available via the TOBY-L2 series cellular module, through the DDC (I2C) interface, while the available GPIOs can handle the positioning chipset / module power-on/off. This means that cellular module and GNSS receiver can be controlled through a single serial port from any host processor.  1.15.11 Hybrid positioning and CellLocate®  Hybrid positioning and CellLocate® are not available on MPCI-L2 series.  Hybrid positioning and CellLocate® are not supported by the TOBY-L2x0-00S product version.  Although GNSS is a widespread technology, its reliance on the visibility of extremely weak GNSS satellite signals means that positioning is not always possible. Especially difficult environments for GNSS are indoors, in enclosed or underground  parking garages, as well  as  in  urban  canyons  where  GNSS signals  are  blocked  or  jammed  by multipath interference. The situation can be improved by augmenting GNSS receiver data with cellular network information to provide positioning information even when GNSS reception is degraded or absent. This additional information can benefit numerous applications.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 51 of 141 Positioning through cellular information: CellLocate® u-blox CellLocate® enables the estimation of device position based on the parameters of the mobile network cells visible to the specific device. To estimate its position the u-blox cellular module sends the CellLocate® server the parameters  of  network  cells  visible  to  it  using  a  UDP  connection.  In  return  the  server  provides  the  estimated position based on the CellLocate® database. The u-blox cellular  module can either  send the parameters of the visible home network cells only (normal scan) or the parameters of all surrounding cells of all mobile operators (deep scan).  The CellLocate® database is compiled from the position of devices which observed, in the past, a specific cell or set of cells (historical observations) as follows:  1. Several devices reported their position to the CellLocate® server when observing a specific cell (the As in the picture represent the position of the devices which observed the same cell A)    2. CellLocate® server defines the area of Cell A visibility
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 52 of 141 3. If a new device reports the observation of Cell A CellLocate® is able to provide the estimated position from the area of visibility    4. The visibility of multiple cells provides increased accuracy based on the intersection of areas of visibility.    CellLocate® is implemented using a set of two AT commands that allow configuration of the CellLocate® service (AT+ULOCCELL) and requesting position according to the user configuration (AT+ULOC). The answer is provided in the form of an unsolicited AT command including latitude, longitude and estimated accuracy.   The accuracy of the position estimated by CellLocate® depends on the availability of historical observations in the specific area.  Hybrid positioning With  u-blox  Hybrid  positioning  technology,  u-blox  cellular  devices  can  be  triggered  to  provide  their  current position using either a u-blox GNSS receiver or the position estimated from CellLocate®. The choice depends on which positioning method provides the best and fastest solution according to the user configuration, exploiting the benefit of having multiple and complementary positioning methods. Hybrid positioning  is implemented through a set of three AT commands that allow configuration of the GNSS receiver (AT+ULOCGNSS), configuration of the CellLocate® service (AT+ULOCCELL), and requesting the position according  to  the  user  configuration  (AT+ULOC).  The  answer  is  provided  in  the  form  of  an  unsolicited  AT command  including  latitude,  longitude  and  estimated  accuracy  (if  the  position  has  been  estimated  by CellLocate®), and additional parameters if the position has been computed by the GNSS receiver. The  configuration  of  mobile  network  cells  does  not  remain  static  (e.g.  new  cells  are  continuously  added  or existing cells are reconfigured by the network operators). For this reason, when a Hybrid positioning method has been  triggered  and  the  GNSS  receiver  calculates  the  position,  a  database  self-learning  mechanism  has  been implemented so that these positions are sent to the server to update the database and maintain its accuracy.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 53 of 141 The use of hybrid positioning requires a connection via the DDC (I2C) bus between the TOBY-L2 series cellular module and the u-blox GNSS receiver (see sections 1.9.3 and 2.6.3). See GNSS Implementation Application Note [13] for the complete description of the feature.   u-blox  is  extremely  mindful  of  user  privacy.  When  a  position  is  sent  to  the  CellLocate®  server  u-blox  is unable to track the SIM used or the specific device.   1.15.12 Firmware update Over AT (FOAT) This feature allows upgrading the module firmware over USB / UART serial interfaces, using AT commands.  The +UFWUPD AT command triggers a reboot followed by the upgrade procedure at specified a baud rate  A special boot loader on the module performs firmware installation, security verifications and module reboot  Firmware authenticity verification is performed via a security signature during the download. The firmware is then  installed,  overwriting  the  current  version.  In  case  of  power  loss  during  this  phase,  the  boot  loader detects a fault at the next wake-up, and restarts the firmware download. After completing the upgrade, the module is reset again and wakes-up in normal boot For more details about Firmware update Over AT procedure  see the Firmware Update Application Note [4] and the u-blox AT Commands Manual [3], +UFWUPD AT command.  1.15.13 Firmware update Over The Air (FOTA)  Firmware update Over The Air (FOTA) is not supported by TOBY-L2x0-00S and MPCI-L2x0-00S.  This  feature  allows  upgrading  the  module  firmware  over  the  LTE/3G/2G  air  interface.  The  main  idea  with updating Firmware over the air is to reduce the amount of data required for transmission to the module. This is achieved by downloading only a “delta file” instead of the full firmware. The delta contains only the differences between the two firmware versions (old and new), and is compressed. For more details about Firmware update Over The Air procedure  see the Firmware Update Application Note [4] and the u-blox AT Commands Manual [3], +UFOTA AT command.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 54 of 141 1.15.14 In-band Modem (eCall / ERA-GLONASS)  In-band  modem  for  eCall  /  ERA-GLONASS  emergency  applications  is  not  supported  by  TOBY-L2x0-00S and MPCI-L2 series.  In-band  Modem  solution  for  eCall  and  ERA-GLONASS  emergency  call  applications  over  cellular  networks  is implemented according to 3GPP TS 26.267 [15], BS EN 16062:2011 [16] and ETSI TS 122 101 [17] specifications. eCall  (European)  and  ERA-GLONASS  (Russian)  are  initiatives  to  combine  mobile  communications  and  satellite positioning  to  provide  rapid  assistance  to  motorists  in  the  event  of  a  collision,  implementing  automated emergency response system based the first on GPS the latter on GLONASS positioning system. When activated, the in-vehicle systems (IVS) automatically initiate an emergency call carrying both voice and data (including  location  data)  directly  to  the  nearest  Public  Safety  Answering  Point  (PSAP)  to  determine  whether rescue services should be dispatched to the known position.   Figure 21: eCall and ERA-GLONASS automated emergency response systems diagram flow For more details regarding the In-band Modem solution for the European eCall and the Russian ERA-GLONASS emergency call applications, see the u-blox eCall / ERA-GLONASS Application Note [18].  1.15.15 SIM Access Profile (SAP)  SIM Access Profile (SAP) is not supported by TOBY-L2x0-00S and MPCI-L2 series.  SIM access profile (SAP) feature allows accessing and using a remote SIM card / chipping instead of the local SIM directly connected to the module SIM interface. A dedicated SAP channel  over USB  and a dedicated  multiplexed SAP channel over  UART  are implemented  for communication with the remote SIM card/chip. Communication  between TOBY-L2  series  module  and  the remote SIM is conformed to  client-server  paradigm: The module is the SAP client establishing a connection and performing data exchange to a SAP server directly connected to the remote SIM that is used  by the  module  for  LTE/3G/2G network-related operations. The SAP communication protocol is based on the SIM Access Profile Interoperability Specification [19]. A typical application using the SAP feature is the scenario where a device such as an embedded car-phone with an integrated TOBY-L2 series module uses a remote SIM included in an external user device (e.g. a simple SIM card reader or a portable phone), which is brought into the car. The car-phone accesses the LTE/3G/2G network using the remote SIM in the external device.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 55 of 141 TOBY-L2  series  modules,  acting  as  an  SAP  client,  can  be  connected  to  an  SAP  server  by  a  completely  wired connection, as shown in Figure 22.  Device including TOBY-L2LTE/3G/2G InterfaceLocal SIM(optional)TOBY-L2SAP ClientApplicationProcessorDevice including SIMSAP                   Serial InterfaceRemote SIMMobileEquipmentSAP ServerSAP              Serial Interface(SAP channel over USB or UART) Figure 22: Remote SIM access via completely wired connection As stated in the SIM Access Profile Interoperability Specification [19], the SAP client can be connected to the SAP server by means of a Bluetooth wireless link, using additional Bluetooth transceivers. In this case, the application processor  wired  to  TOBY-L2  series  module  establishes  and  controls  the  Bluetooth  connection  using  the  SAP profile, and routes  data  received  over  a serial  interface  channel  to  data  transferred over  a Bluetooth interface and vice versa, as shown in Figure 23.  Device including TOBY-L2SAP              Serial Interface(SAP channel over USB or UART)LTE/3G/2G InterfaceLocal SIM(optional)TOBY-L2SAP ClientApplicationProcessorSAP  Bluetooth InterfaceBluetoothTransceiverDevice including SIMRemote SIMMobileEquipmentSAP ServerBluetoothTransceiver Figure 23: Remote SIM access via Bluetooth and wired connection The application processor can start an SAP connection negotiation between TOBY-L2 series module SAP client and an SAP server using custom AT command (for more details see u-blox AT Commands Manual [3]). While  the  connection  with  the  SAP  server  is  not  fully  established,  the  TOBY-L2  series  module  continues  to operate with the attached (local) SIM, if present. Once the connection is established and negotiated, the module performs a detach operation from the local SIM followed by an attach operation to the remote one. Then the remotely attached SIM is used for any LTE/3G/2G network operation. URC indications are provided to inform the user about the state of both the local and remote SIM. The insertion and the removal of the local SIM card are notified if a proper card presence detection circuit using the GPIO5 of TOBY-L2  series modules is implemented as shown  in  section 2.5, and  if  the  related “SIM card detection” and “SIM hot insertion/removal” functions described in section 1.8.2 are enabled by AT commands (for more details see u-blox AT Commands Manual [3]). Upon SAP deactivation, the TOBY-L2 series modules perform a detach operation from the remote SIM followed by an attach operation to the local one, if present.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 56 of 141 1.15.16 Smart temperature management  Smart temperature management is not supported by TOBY-L2x0-00S and MPCI-L2x0-00S.  Cellular modules – independent of the specific model – always have a well defined operating temperature range. This range should be respected to guarantee full device functionality and long life span. Nevertheless  there  are  environmental  conditions  that  can  affect  operating  temperature,  e.g.  if  the  device  is located near a heating/cooling source, if there is/isn’t air circulating, etc. The module itself can also influence the environmental conditions; such as when it is transmitting at full power. In this case its temperature increases very quickly and can raise the temperature nearby. The best solution is always to properly design the system where the module is integrated. Nevertheless an extra check/security  mechanism  embedded  into  the  module  is  a  good  solution  to  prevent  operation  of  the  device outside of the specified range.  Smart Temperature Supervisor (STS) The  Smart  Temperature  Supervisor  is  activated  and  configured  by  a  dedicated  AT+USTS  command.  See  the u-blox AT Commands Manual [3] for more details. The cellular module measures the internal temperature (Ti) and its value is compared with predefined thresholds to identify the actual working temperature range.   Temperature measurement is done inside the cellular module: the measured value could be different from the environmental temperature (Ta). Warningareat-1 t+1 t+2t-2Valid temperature rangeSafeareaDangerousarea Dangerousarea Warningarea Figure 24: Temperature range and limits The entire temperature range is divided into sub-regions by limits (see Figure 24) named t-2, t-1, t+1 and t+2.  Within the first limit, (t-1 < Ti < t+1), the cellular module is in the normal working range, the Safe Area  In the Warning Area, (t-2 < Ti < t.1) or (t+1 < Ti < t+2), the cellular module is still inside the valid temperature range, but the measured temperature approaches the limit (upper or lower). The module sends a warning to the user (through the active AT communication interface), which can take, if possible, the necessary actions to return to a safer temperature range or simply ignore the indication. The module is still in a valid and good working condition  Outside the valid temperature range, (Ti < t-2) or (Ti > t+2), the device is working outside the specified range and  represents  a  dangerous  working  condition.  This  condition  is  indicated  and  the  device  shuts  down  to avoid damage   For security  reasons  the  shutdown  is  suspended  in case  an  emergency  call in  progress.  In this  case the device will switch off at call termination.  The user can decide at anytime to enable/disable the Smart Temperature Supervisor feature. If the feature is disabled there is no embedded protection against disallowed temperature conditions.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 57 of 141 Figure 25 shows the flow diagram implemented for the Smart Temperature Supervisor.  IF STS enabledRead temperatureIF(t-1<Ti<t+1)IF(t-2<Ti<t+2)Send notification (warning)Send notification(dangerous)Wait emergencycall terminationIFemerg. call in progressShut the device downYesNoYesYesNoNoNoYesSend shutdownnotificationFeature enabled (full logic or indication only)IF Full Logic EnabledFeature disabled: no actionTemperature is  within normal operating rangeYesTempetature  is within warning areaTempetature is outside valid temperature rangeNoFeatuere enabled in full logic modeFeature enabled in  indication only mode:no  further actionsSend notification (safe)Previously outside of Safe AreaTempetature  is back to safe areaNoNo furtheractionsYes Figure 25: Smart Temperature Supervisor (STS) flow diagram
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  System description     Page 58 of 141 Threshold Definitions When the application of  cellular module operates at extreme temperatures with Smart Temperature Supervisor enabled, the user should note that outside the valid temperature range the device will automatically shut down as described above. The  input  for  the algorithm  is  always  the temperature  measured  within the  cellular module  (Ti,  internal). This value can be higher than the working ambient temperature (Ta, ambient), as (for example) during transmission at  maximum  power  a  significant  fraction  of  DC  input  power  is  dissipated  as  heat  This  behavior  is  partially compensated  by  the  definition  of  the  upper  shutdown  threshold  (t+2)  that  is  slightly  higher  than  the  declared environmental temperature limit.   The sensor measures board temperature inside the shields, which can differ from ambient temperature.  1.15.17 Power saving The power saving configuration is by default disabled, but it can be enabled using the AT+UPSV command (for the complete description of the AT+UPSV command, see the u-blox AT Commands Manual [3]). When power saving is enabled, the module automatically enters the  low power idle-mode whenever possible, reducing current consumption (see section 1.5.1.5, TOBY-L2 Data Sheet [1] and MPCI-L2 Data Sheet [2]). During  the  low  power  idle-mode,  the  module  is  not  ready  to  communicate  with  an  external  device,  as  it  is configured to reduce power consumption. The module wakes up from low power idle-mode to active-mode in the following events:  Automatic periodic monitoring of the paging channel for the reception of the paging block sent by the base station according to network conditions (see section 1.5.1.5)  The connected USB host forces a remote wakeup of the module as USB device (see section 1.9.1.4)  A preset RTC alarm occurs (see u-blox AT Commands Manual [3], AT+CALA)  For the definition and the description of TOBY-L2 and MPCI-L2 series modules operating modes, including the events forcing transitions between the different operating modes, see the section 1.4.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 59 of 141 2 Design-in 2.1 Overview For  an  optimal  integration  of  TOBY-L2  and  MPCI-L2  series  modules  in  the  final  application  board  follow  the design guidelines stated in this section. Every  application  circuit  must  be  properly  designed  to  guarantee  the  correct  functionality  of  the  relative interface, however a number of points require high attention during the design of the application device.  The following list provides a rank of importance in the application design, starting from the highest relevance:  1. Module antenna connection: ANT1, ANT2 and ANT_DET. Antenna circuit directly affects the RF compliance  of the device integrating  a TOBY-L2 and MPCI-L2 series module with applicable certification schemes. Very carefully follow the suggestions provided in the relative section 2.4 for schematic and layout design. 2. Module supply: VCC or 3.3Vaux and GND pins.  The supply circuit affects the RF compliance of the device integrating a TOBY-L2 and MPCI-L2 series module with  applicable  required  certification  schemes  as  well  as  antenna  circuit  design.  Very  carefully  follow  the suggestions provided in the relative section 2.2.1 for schematic and layout design.  3. USB interface: USB_D+, USB_D- pins.  Accurate  design  is  required  to  guarantee  USB  2.0  high-speed  interface  functionality.  Carefully  follow  the suggestions provided in the relative section 2.6.1 for schematic and layout design. 4. SIM interface: VSIM, SIM_CLK, SIM_IO, SIM_RST or UIM_PWR, UIM_DATA, UIM_CLK, UIM_RESET pins. Accurate design is required to guarantee SIM card functionality reducing the risk of RF coupling. Carefully follow the suggestions provided in the relative section 2.5 for schematic and layout design. 5. SDIO interface: SDIO_D0, SDIO_D1, SDIO_D2, SDIO_D3, SDIO_CLK, SDIO_CMD pins.  Accurate  design  is  required  to  guarantee  SDIO  interface  functionality.  Carefully  follow  the  suggestions provided in the relative section 2.6.4 for schematic and layout design. 6. System functions: RESET_N or PERST#, PWR_ON pins. Accurate design  is required  to guarantee  that  the  voltage  level  is  well  defined  during  operation. Carefully follow the suggestions provided in the relative section 2.3 for schematic and layout design.  7. Other supplies: V_BCKP RTC supply and V_INT generic digital interfaces supply. Accurate  design  is  required  to  guarantee  proper  functionality.  Follow  the  suggestions  provided  in  the corresponding sections 2.2.2 and 2.2.3 for schematic and layout design. 8. Other digital interfaces: UART, I2C, I2S, Host Select, GPIOs, Mini PCIe specific signals and Reserved pins. Accurate design is required to guarantee  proper functionality. Follow the suggestions provided  in sections 2.6.2, 2.6.3, 2.7.1, 2.3.3, 2.8, 2.9 and 2.10 for schematic and layout design.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 60 of 141 2.2 Supply interfaces 2.2.1 Module supply (VCC or 3.3Vaux) 2.2.1.1 General guidelines for VCC or 3.3Vaux supply circuit selection and design VCC  or  3.3Vaux  pins  are  internally  connected.  Application  design  shall  connect  all  the  available  pads  to  the external supply to minimize the power loss due to series resistance. GND pins are internally connected. Application design shall connect all the available pads to solid ground on the application board,  since  a good (low  impedance)  connection to external  ground can minimize power  loss and improve RF and thermal performance.  TOBY-L2 and MPCI-L2 series modules must be sourced through the VCC or the 3.3Vaux pins with a proper DC power  supply  that  should  meet  the  following  prerequisites  to  comply  with  the  modules’ VCC  or  3.3Vaux requirements summarized in Table 7. The proper DC power supply can be selected according to the application requirements (see Figure 26) between the different possible supply sources types, which most common ones are the following:  Switching regulator  Low Drop-Out (LDO) linear regulator  Rechargeable Lithium-ion (Li-Ion) or Lithium-ion polymer (Li-Pol) battery, for TOBY-L2 series only  Primary (disposable) battery, for TOBY-L2 series only  Main Supply Available?BatteryLi-Ion 3.7 VLinear LDO RegulatorMain Supply Voltage > 5V?Switching Step-Down RegulatorNo, portable deviceNo, less than 5 VYes, greater than 5 VYes, always available  Figure 26: VCC supply concept selection The switching step-down regulator is the typical choice when the available primary supply source has a nominal voltage much higher (e.g. greater than 5 V) than the operating supply voltage of TOBY-L2 and MPCI-L2 series. The  use  of  switching  step-down  provides  the  best  power  efficiency  for  the  overall  application  and  minimizes current drawn from the main supply source. See 2.2.1.2, 2.2.1.6, 2.2.1.9, 2.2.1.10 for specific design-in. The use of an LDO linear regulator becomes convenient for  a primary supply with a relatively low voltage (e.g. less or equal than 5 V). In this case the typical 90% efficiency of the switching regulator diminishes the benefit of  voltage  step-down  and  no  true  advantage  is  gained  in  input  current  savings.  On  the  opposite  side,  linear regulators are not recommended for high voltage step-down as they dissipate a considerable amount of energy in thermal power. See 2.2.1.3, 2.2.1.6, 2.2.1.9, 2.2.1.10 for specific design-in. If TOBY-L2 modules are deployed in a mobile unit where no permanent primary supply source is available, then a battery will be required to provide VCC. A standard 3-cell Li-Ion or Li-Pol battery pack directly connected to VCC is the usual choice for battery-powered devices. During charging, batteries with Ni-MH chemistry typically reach a maximum voltage that is above the maximum rating for VCC, and should therefore be avoided. See 2.2.1.4, 2.2.1.6, 2.2.1.9, 2.2.1.10 for specific design-in. Keep  in  mind  that  the  use  of  rechargeable  batteries  requires  the  implementation  of  a  suitable  charger  circuit which is not included in the modules. The charger  circuit has to be  designed to  prevent  over-voltage on  VCC pins  of  the  module,  and  it  should  be  selected  according  to  the  application  requirements:  a  DC/DC  switching
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 61 of 141 charger  is  the  typical  choice  when  the  charging  source  has  an  high  nominal  voltage  (e.g.  ~12  V),  whereas  a linear charger is the typical choice when the charging source has a relatively low nominal voltage (~5 V). If both a permanent primary supply / charging source (e.g. ~12 V) and a rechargeable back-up battery (e.g. 3.7 V Li-Pol) are available at the same time in the application as possible supply source, then a proper charger / regulator with integrated  power path  management  function can  be  selected  to  supply the  module  while simultaneously  and independently charging the battery. See 2.2.1.7, 2.2.1.8 and 2.2.1.6, 2.2.1.9, 2.2.1.10 for specific design-in. The use of a primary (not rechargeable) battery is in general uncommon, but appropriate parts can be selected given that the most cells available are seldom capable of delivering the maximum current specified in  TOBY-L2 series Data Sheet [1] during connected-mode. Carefully evaluate the usage of super-capacitors as supply source since aging and temperature conditions significantly affect the actual capacitor characteristics. See 2.2.1.5 and 2.2.1.6, 2.2.1.9, 2.2.1.10 for specific design-in. Rechargeable  3-cell Li-Ion or Li-Pol and Ni-MH chemistry  batteries reach a maximum voltage  that  is above the maximum  rating  for  the  3.3Vaux  supply  of  MPCI-L2  modules,  and  should  therefore  be  avoided.  The  use  of rechargeable, not-rechargeable battery or super-capacitors is very uncommon for Mini PCI Express applications, so that these supply sources types are not considered for MPCI-L2 modules. The usage of more than one DC supply at the same time should be carefully evaluated: depending on the supply source characteristics, different DC supply systems can result as mutually exclusive.  The following sections highlight some design aspects for each of the supplies listed above providing application circuit design-in compliant with the module VCC requirements summarized in Table 7.  2.2.1.2 Guidelines for VCC or 3.3Vaux supply circuit design using a switching regulator The use of a switching regulator is suggested when the difference from the available supply rail to the  VCC or the  3.3Vaux  value  is  high,  since  switching  regulators  provide  good  efficiency  transforming  a  12  V  or  greater voltage supply to the typical 3.8 V value of the VCC supply or the typical 3.3 V value of the 3.3Vaux supply. The  characteristics  of  the  switching  regulator  connected  to  VCC  or  3.3Vaux  pins  should  meet  the  following prerequisites to comply with the module VCC or 3.3Vaux requirements summarized in Table 7:  Power  capability:  the  switching  regulator  with  its output  circuit  must be  capable  of  providing  a  voltage value to the VCC or 3.3Vaux pins within the specified operating range and must be capable of delivering to VCC  or  3.3Vaux  pins  the  maximum  peak  /  pulse  current  consumption  during  Tx  burst  at  maximum  Tx power specified in the TOBY-L2 series Data Sheet [1] or in the MPCI-L2 series Data Sheet [2].  Low output ripple: the switching regulator together with its output circuit must be capable of providing a clean (low noise) VCC or 3.3Vaux voltage profile.  High switching frequency: for best performance and for smaller applications it is recommended to select a switching frequency ≥ 600 kHz (since L-C output filter is typically smaller for high switching frequency). The use of a switching regulator with a variable switching frequency  or with a switching frequency lower than 600 kHz must be carefully evaluated since this can produce noise in the VCC or 3.3Vaux voltage profile and therefore negatively impact LTE/3G/2G modulation spectrum performance. An additional L-C low-pass filter between the switching regulator output to VCC or 3.3Vaux supply pins can mitigate the ripple at the input of the module, but adds extra voltage drop due to resistive losses on series inductors.  PWM  mode  operation:  it  is  preferable  to  select  regulators  with  Pulse  Width  Modulation  (PWM)  mode. While in connected-mode,  the  Pulse  Frequency Modulation  (PFM)  mode and PFM/PWM  modes  transitions must be avoided to reduce  the noise on the  VCC or 3.3Vaux voltage profile. Switching regulators  can be used that are able to switch between low ripple PWM mode and high ripple PFM mode, provided that the mode transition occurs when the module changes status from the idle/active-modes to connected-mode. It is  permissible  to  use  a  regulator  that  switches  from  the  PWM  mode  to  the  burst  or  PFM  mode  at  an appropriate current threshold.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 62 of 141 Figure 27 and Table 13 show an example of a high reliability power supply circuit, where the module VCC or 3.3Vaux input is supplied by a step-down switching regulator capable of delivering maximum current with low output ripple and with fixed switching frequency in PWM mode operation greater than 1 MHz.  12VC5R3C4R2C2C1R1VINRUNVCRTPGSYNCBDBOOSTSWFBGND671095C61238114C7 C8D1 R4R5L1C3U1TOBY-L2 series71 VCC72 VCC70 VCCGND12VC5R3C4R2C2C1R1VINRUNVCRTPGSYNCBDBOOSTSWFBGND671095C61238114C7 C8D1 R6R5L1C3U1MPCI-L2 series24 3.3Vaux39 3.3Vaux23.3VauxGND41 3.3Vaux52 3.3Vaux Figure 27: Example of high reliability VCC and 3.3Vaux supply application circuit using a step-down regulator Reference Description Part Number - Manufacturer C1 10 µF Capacitor Ceramic X7R 5750 15% 50 V C5750X7R1H106MB - TDK C2 10 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C103KA01 - Murata C3 680 pF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71H681KA01 - Murata C4 22 pF Capacitor Ceramic C0G 0402 5% 25 V GRM1555C1H220JZ01 - Murata C5 10 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C103KA01 - Murata C6 470 nF Capacitor Ceramic X7R 0603 10% 25 V GRM188R71E474KA12 - Murata C7 22 µF Capacitor Ceramic X5R 1210 10% 25 V GRM32ER61E226KE15 - Murata C8 330 µF Capacitor Tantalum D_SIZE 6.3 V 45 m T520D337M006ATE045 - KEMET D1 Schottky Diode 40 V 3 A MBRA340T3G - ON Semiconductor L1 10 µH Inductor 744066100 30% 3.6 A 744066100 - Wurth Electronics R1 470 k Resistor 0402 5% 0.1 W 2322-705-87474-L - Yageo R2 15 k Resistor 0402 5% 0.1 W 2322-705-87153-L - Yageo R3 22 k Resistor 0402 5% 0.1 W 2322-705-87223-L - Yageo R4 390 k Resistor 0402 1% 0.063 W RC0402FR-07390KL - Yageo R5 100 k Resistor 0402 5% 0.1 W 2322-705-70104-L - Yageo R6 330 k Resistor 0402 1% 0.063 W RC0402FR-07330KL - Yageo U1 Step-Down Regulator MSOP10 3.5 A 2.4 MHz LT3972IMSE#PBF - Linear Technology Table 13: Components for high reliability VCC and 3.3Vaux supply application circuit using a step-down regulator
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 63 of 141 Figure 28 and the components listed in Table 14 show an example of a low cost power supply circuit, where the VCC  module  supply  is  provided  by  a  step-down  switching  regulator  capable  of  delivering  to  VCC  pins  the specified maximum peak / pulse current, transforming a 12 V supply input.  TOBY-L2 series12VR5C6C1VCCINHFSWSYNCOUTGND263178C3C2D1 R1R2L1U1GNDFBCOMP54R3C4R4C571 VCC72 VCC70 VCC12VR5C6C1VCCINHFSWSYNCOUTGND263178C3C2D1 R6R7L1U1GNDFBCOMP54R3C4R4C5MPCI-L2 series24 3.3Vaux39 3.3Vaux23.3Vaux41 3.3Vaux52 3.3Vaux Figure 28: Example of low cost VCC and 3.3Vaux supply application circuit using step-down regulator Reference Description Part Number - Manufacturer C1 22 µF Capacitor Ceramic X5R 1210 10% 25 V GRM32ER61E226KE15 – Murata C2 100 µF Capacitor Tantalum B_SIZE 20% 6.3V 15m T520B107M006ATE015 – Kemet C3 5.6 nF Capacitor Ceramic X7R 0402 10% 50 V GRM155R71H562KA88 – Murata C4  6.8 nF Capacitor Ceramic X7R 0402 10% 50 V GRM155R71H682KA88 – Murata C5 56 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H560JA01 – Murata C6 220 nF Capacitor Ceramic X7R 0603 10% 25 V GRM188R71E224KA88 – Murata D1 Schottky Diode 25V 2 A STPS2L25 – STMicroelectronics L1 5.2 µH Inductor 30% 5.28A 22 m MSS1038-522NL – Coilcraft R1 4.7 k Resistor 0402 1% 0.063 W RC0402FR-074K7L – Yageo R2 910  Resistor 0402 1% 0.063 W RC0402FR-07910RL – Yageo R3 82  Resistor 0402 5% 0.063 W RC0402JR-0782RL – Yageo R4 8.2 k Resistor 0402 5% 0.063 W RC0402JR-078K2L – Yageo R5 39 k Resistor 0402 5% 0.063 W RC0402JR-0739KL – Yageo R6 1.5 k Resistor 0402 1% 0.063 W RC0402FR-071K5L – Yageo R7 330  Resistor 0402 1% 0.063 W RC0402FR-07330RL – Yageo U1 Step-Down Regulator 8-VFQFPN 3 A 1 MHz L5987TR – ST Microelectronics Table 14: Components for low cost VCC and 3.3Vaux supply application circuit using a step-down regulator
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 64 of 141 2.2.1.3 Guidelines for VCC or 3.3Vaux supply circuit design using a Low Drop-Out linear regulator The use of a linear regulator is suggested when the difference from the available supply rail and the  VCC or the 3.3Vaux  value  is  low.  The  linear  regulators  provide  high  efficiency  when  transforming  a  5  VDC  supply  to  a voltage value within the module VCC or 3.3Vaux normal operating range. The characteristics of the Low Drop-Out (LDO) linear regulator connected to VCC or 3.3Vaux pins should meet the following prerequisites to comply with the module VCC or 3.3Vaux requirements summarized in Table 7:  Power capabilities: the LDO linear regulator with its output circuit must be capable of providing a voltage value to the VCC or 3.3Vaux pins within the specified operating range and must be capable of delivering to VCC  or  3.3Vaux  pins  the  maximum  peak  /  pulse  current  consumption  during  Tx  burst  at  maximum  Tx power specified in TOBY-L2 series Data Sheet [1] or in MPCI-L2 series Data Sheet [2].  Power dissipation: the power handling capability of the LDO linear regulator must be checked to limit its junction temperature to the maximum rated operating range (i.e. check the voltage drop from the max input voltage to the minimum output voltage to evaluate the power dissipation of the regulator).  Figure 29 and the components listed in Table 15 show an example of a power supply circuit, where the VCC or 3.3Vaux module supply is provided by an LDO linear regulator capable of delivering the required current, with proper power handling capability. It is recommended to configure the LDO linear regulator  to generate a voltage supply value slightly below the maximum limit of the module VCC or 3.3Vaux normal operating range (e.g. ~4.1 V for the VCC and ~3.44 V for the 3.3Vaux  as  in the circuits described  in  Figure 29 and  Table  15). This reduces  the  power on the  linear regulator and improves the thermal design of the circuit.  5VC1 R1IN OUTADJGND12453C2R2R3U1SHDNTOBY-L2 series71 VCC72 VCC70 VCCGNDC35VC1 R1IN OUTADJGND12453C2R4R5U1SHDNMPCI-L2 seriesGNDC324 3.3Vaux39 3.3Vaux23.3Vaux41 3.3Vaux52 3.3Vaux Figure 29: Suggested schematic design for the VCC and 3.3Vaux supply application circuit using an LDO linear regulator Reference Description Part Number - Manufacturer C1, C2 10 µF Capacitor Ceramic X5R 0603 20% 6.3 V GRM188R60J106ME47 - Murata C3 330 µF Capacitor Tantalum D_SIZE 6.3 V 45 m T520D337M006ATE045 - KEMET R1 47 k Resistor 0402 5% 0.1 W RC0402JR-0747KL - Yageo Phycomp R2 9.1 k Resistor 0402 5% 0.1 W RC0402JR-079K1L - Yageo Phycomp R3 3.9 k Resistor 0402 5% 0.1 W RC0402JR-073K9L - Yageo Phycomp R4 3.3 k Resistor 0402 5% 0.1 W RC0402JR-073K3L - Yageo Phycomp R5 1.8 k Resistor 0402 5% 0.1 W RC0402JR-071K8L - Yageo Phycomp U1 LDO Linear Regulator ADJ 3.0 A LT1764AEQ#PBF - Linear Technology Table 15: Suggested components for VCC and 3.3Vaux supply application circuit using an LDO linear regulator
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 65 of 141 Figure 30 and the components listed in Table 16 show an example of a low cost power supply circuit, where the VCC  module  supply  is  provided  by  an  LDO  linear  regulator  capable  of  delivering  the  specified  highest  peak  / pulse current, with proper power handling capability. The regulator described in this example supports a limited input voltage range and it includes internal circuitry for current and thermal protection. It is recommended to configure the LDO linear regulator to generate a voltage supply value slightly below the maximum limit of the module VCC normal operating range (e.g. ~4.1 V as in the circuit described in Figure 30 and  Table  16).  This reduces  the  power  on  the  linear  regulator  and improves  the  whole  thermal design  of  the supply circuit.  5VC1IN OUTADJGND12453C2R1R2U1ENTOBY-L2 series71 VCC72 VCC70 VCCGNDC35VC1IN OUTADJGND12453C2R3R4U1ENMPCI-L2 seriesGNDC324 3.3Vaux39 3.3Vaux23.3Vaux41 3.3Vaux52 3.3Vaux Figure 30: Suggested schematic design for the VCC and 3.3Vaux supply application circuit using an LDO linear regulator Reference Description Part Number - Manufacturer C1, C2 10 µF Capacitor Ceramic X5R 0603 20% 6.3 V GRM188R60J106ME47 - Murata C3 330 µF Capacitor Tantalum D_SIZE 6.3 V 45 m T520D337M006ATE045 - KEMET R1 27 k Resistor 0402 5% 0.1 W RC0402JR-0727KL - Yageo Phycomp R2 4.7 k Resistor 0402 5% 0.1 W RC0402JR-074K7L - Yageo Phycomp R3 12 k Resistor 0402 5% 0.1 W RC0402JR-0712KL - Yageo Phycomp R4 2.7 k Resistor 0402 5% 0.1 W RC0402JR-072K7L - Yageo Phycomp U1 LDO Linear Regulator ADJ 3.0 A LP38501ATJ-ADJ/NOPB - Texas Instrument Table 16: Suggested components for VCC voltage supply application circuit using an LDO linear regulator  2.2.1.4 Guidelines for VCC supply circuit design using a rechargeable Li-Ion or Li-Pol battery Rechargeable  Li-Ion  or  Li-Pol  batteries  connected  to  the  VCC  pins  should  meet  the  following  prerequisites  to comply with the module VCC requirements summarized in Table 7:  Maximum pulse and DC discharge current: the rechargeable Li-Ion battery with its related output circuit connected  to  the  VCC  pins  must  be  capable  of  delivering  a  pulse  current  as  the  maximum  peak  current consumption during Tx burst at maximum Tx power specified in TOBY-L2 series Data Sheet [1] and must be capable  of  extensively  delivering  a  DC  current  as  the  maximum  average  current  consumption  specified  in TOBY-L2 series Data Sheet [1]. The maximum discharge current is not always reported in battery data sheets, but  the  maximum  DC  discharge  current  is  typically  almost  equal  to  the  battery  capacity  in  Amp-hours divided by 1 hour.  DC series resistance: the rechargeable Li-Ion battery with its output circuit must be capable of avoiding a VCC voltage drop below the operating range summarized in Table 7 during transmit bursts.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 66 of 141 2.2.1.5 Guidelines for VCC supply circuit design using a primary (disposable) battery The  characteristics  of  a  primary  (non-rechargeable)  battery  connected  to  VCC  pins  should  meet  the  following prerequisites to comply with the module VCC requirements summarized in Table 7:  Maximum  pulse  and DC  discharge  current: the non-rechargeable battery with its related output circuit connected  to  the  VCC  pins  must  be  capable  of  delivering  a  pulse  current  as  the  maximum  peak  current consumption during Tx burst at maximum Tx power specified in TOBY-L2 series Data Sheet [1] and must be capable  of  extensively  delivering  a  DC  current  as  the  maximum  average  current  consumption  specified  in TOBY-L2 series Data Sheet [1]. The maximum discharge current is not always reported in battery data sheets, but  the  maximum  DC  discharge  current  is  typically  almost  equal  to  the  battery  capacity  in  Amp-hours divided by 1 hour.  DC  series  resistance: the non-rechargeable battery  with its output circuit must  be capable of  avoiding a VCC voltage drop below the operating range summarized in Table 7 during transmit bursts.  2.2.1.6 Additional guidelines for VCC or 3.3Vaux supply circuit design To reduce  voltage  drops, use  a  low  impedance  power  source.  The  series resistance  of  the  power  supply  lines (connected to the modules’  VCC / 3.3Vaux and GND  pins) on the application board and battery pack should also be considered and minimized: cabling and routing must be as short as possible to minimize power losses. Three pins are allocated to VCC supply and five pins to  3.3Vaux supply. Several pins are designated for GND connection. Even if all the VCC / 3.3Vaux pins and all the GND pins are internally connected within the module, it is recommended to properly connect all of them to supply the module to minimize series resistance losses. To  avoid  voltage  drop  undershoot  and  overshoot  at  the  start  and  end  of  a  transmit  burst  during  a  GSM  call (when  current  consumption  on  the  VCC  or  3.3Vaux  supply  can  rise  up  as  specified  in  TOBY-L2  series  Data Sheet [1] or in MPCI-L2 series Data Sheet [2]), place a bypass capacitor with large capacitance (at least 100 µF) and low ESR near the VCC pins, for example:  330 µF capacitance, 45 m ESR (e.g. KEMET T520D337M006ATE045, Tantalum Capacitor) To reduce voltage ripple and noise, improving RF performance especially if the application device integrates an internal antenna, place the following bypass capacitors near the VCC / 3.3Vaux pins:  68 pF capacitor with Self-Resonant Frequency in the 800/900 MHz range (e.g. Murata GRM1555C1H680J) to filter EMI in the RF low frequencies bands  15  pF  capacitor  with  Self-Resonant  Frequency  in  1800/1900  MHz  range  (e.g.  Murata  GRM1555C1E150J)  to filter EMI in the RF high frequencies bands  8.2 pF capacitor with Self-Resonant Frequency in 2500/2600 MHz range (e.g. Murata GRM1555C1H8R2D)  to filter EMI in the RF very high frequencies band  10 nF capacitor (e.g. Murata GRM155R71C103K) to filter digital logic noise from clocks and data sources  100 nF capacitor (e.g. Murata GRM155R61C104K) to filter digital logic noise from clocks and data sources A suitable series ferrite bead can be properly placed on the  VCC / 3.3Vaux line for additional noise filtering if required by the specific application according to the whole application board design.   The necessity of each part depends on the specific design, but it is recommended to provide all the bypass capacitors described in Figure 31 / Table 17 if the application device integrates an internal antenna.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 67 of 141 C2GNDC3 C4TOBY-L2 series71VCC72VCC70VCCC1 C5 C63V8C2GNDC3 C4MPCI-L2 seriesC1 C5 C63V3243.3Vaux393.3Vaux23.3Vaux413.3Vaux523.3Vaux Figure 31: Suggested schematic for the VCC / 3.3Vaux bypass capacitors to reduce ripple / noise on supply voltage profile  Reference Description Part Number - Manufacturer C1 68 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H680JA01 - Murata C2 15 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H150JA01 - Murata C3 8.2 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H8R2DZ01 - Murata C4 10 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C103KA01 - Murata C5 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C104KA01 - Murata C6 330 µF Capacitor Tantalum D_SIZE 6.3 V 45 m T520D337M006ATE045 - KEMET Table 17: Suggested components to reduce ripple / noise on VCC / 3.3Vaux   ESD sensitivity rating of the VCC / 3.3Vaux supply pins is 1 kV (HBM according to JESD22-A114). Higher protection  level  can  be  required  if  the  line  is  externally  accessible  on  the  application  board,  e.g.  if accessible  battery  connector  is  directly  connected  to  the  supply  pins.  Higher  protection  level  can  be achieved by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor) close to accessible point.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 68 of 141 2.2.1.7 Guidelines for external battery charging circuit TOBY-L2 modules do not have an on-board charging circuit. Figure 32 provides an example of a battery charger design, suitable for applications that are battery powered with a Li-Ion (or Li-Polymer) cell. In  the  application  circuit,  a  rechargeable  Li-Ion  (or  Li-Polymer)  battery  cell,  that  features  proper  pulse  and  DC discharge current capabilities and proper DC series resistance, is directly connected to the  VCC supply input of TOBY-L2 module. Battery charging is completely managed by the STMicroelectronics L6924U Battery Charger IC that, from a USB power source (5.0 V typ.), charges as a linear charger the battery, in three phases:  Pre-charge constant current (active when the battery is deeply discharged): the battery is charged with a low current, set to 10% of the fast-charge current  Fast-charge constant current: the battery is charged with the maximum current, configured by the value of an external resistor to a value suitable for USB power source (~500 mA)  Constant  voltage:  when  the  battery  voltage  reaches  the  regulated  output  voltage  (4.2  V),  the  L6924U starts  to  reduce  the  current  until  the  charge  termination  is  done.  The  charging  process  ends  when  the charging current reaches the value configured by an external resistor to ~15 mA or when the charging timer reaches the value configured by an external capacitor to ~9800 s Using a battery pack with an internal NTC resistor, the L6924U can monitor the battery temperature to protect the battery from operating under unsafe thermal conditions. Alternatively the L6924U, providing input voltage range up to 12 V, can charge from an AC wall adapter. When a current-limited adapter is used, it can operate in quasi-pulse mode, reducing power dissipation. C5 C8C7C6 C9GNDTOBY-L2 series71 VCC72 VCC70 VCC+USB SupplyC3 R4θU1IUSBIACIENDTPRGSDVINVINSNSMODEISELC2C15V0THGNDVOUTVOSNSVREFR1R2R3Li-Ion/Li-Pol Battery PackD1B1C4Li-Ion/Li-Polymer    Battery Charger ICC10 Figure 32: Li-Ion (or Li-Polymer) battery charging application circuit Reference Description Part Number - Manufacturer B1 Li-Ion (or Li-Polymer) battery pack with 470  NTC Various manufacturer C1, C4 1 µF Capacitor Ceramic X7R 0603 10% 16 V GRM188R71C105KA12 - Murata C2, C6 10 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C103KA01 - Murata C3 1 nF Capacitor Ceramic X7R 0402 10% 50 V GRM155R71H102KA01 - Murata C5 330 µF Capacitor Tantalum D_SIZE 6.3 V 45 m T520D337M006ATE045 - KEMET C7 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R61A104KA01 - Murata C8 68 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H680JA01 - Murata C9 15 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H150JA01 - Murata C10 8.2 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H8R2DZ01 - Murata D1 Low Capacitance ESD Protection USB0002RP or USB0002DP - AVX R1, R2 24 k Resistor 0402 5% 0.1 W RC0402JR-0724KL - Yageo Phycomp R3 3.3 k Resistor 0402 5% 0.1 W RC0402JR-073K3L - Yageo Phycomp R4 1.0 k Resistor 0402 5% 0.1 W RC0402JR-071K0L - Yageo Phycomp U1 Single Cell Li-Ion (or Li-Polymer) Battery Charger IC  L6924U - STMicroelectronics Table 18: Suggested components for Li-Ion (or Li-Polymer) battery charging application circuit
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 69 of 141 2.2.1.8 Guidelines for external battery charging and power path management circuit Application devices where both a permanent primary supply / charging source (e.g. ~12 V) and a rechargeable back-up battery (e.g. 3.7 V Li-Pol) are available at the same time as possible supply source should implement a suitable  charger  /  regulator  with  integrated  power  path  management  function  to  supply  the  module  and  the whole device while simultaneously and independently charging the battery. Figure 33 reports a simplified block diagram circuit showing the working principle of a charger / regulator with integrated power path management function. This component allows the system to be powered by a permanent primary  supply  source  (e.g.  ~12  V)  using  the  integrated  regulator  which  simultaneously  and  independently recharges the battery (e.g. 3.7 V Li-Pol) that represents the back-up supply source of the system: the power path management  feature  permits  the  battery  to  supplement  the  system  current  requirements  when  the  primary supply source is not available or cannot deliver the peak system currents. A power management IC should meet the following prerequisites to comply with the module VCC requirements summarized in Table 7:  High efficiency internal step down converter, compliant with the performances specified in section 2.2.1.2  Low internal resistance in the active path Vout – Vbat, typically lower than 50 m  High efficiency switch mode charger with separate power path control  GNDPower path management ICVoutVinθLi-Ion/Li-Pol Battery PackGNDSystem12 V Primary SourceCharge controllerDC/DC converter and battery FET control logicVbat Figure 33: Charger / regulator with integrated power path management circuit block diagram  Figure 34 and the components listed in Table 19 provide an application circuit example where the MPS MP2617 switching  charger  /  regulator  with  integrated  power  path  management  function  provides  the  supply  to  the cellular  module  while  concurrently  and  autonomously  charging  a  suitable  Li-Ion  (or  Li-Polymer)  battery  with proper pulse and DC discharge current capabilities and proper DC series resistance according to the rechargeable battery recommendations described in section 2.2.1.4. The MP2617 IC  constantly  monitors the battery voltage and selects  whether to  use  the  external main primary supply / charging source or the battery as supply source for the module, and starts a charging phase accordingly.  The  MP2617  IC  normally  provides  a  supply  voltage  to  the  module  regulated  from  the  external  main  primary source  allowing  immediate  system  operation  even  under  missing  or  deeply  discharged  battery:  the  integrated switching step-down regulator is capable to provide up to 3 A output current with low output ripple and fixed 1.6  MHz  switching  frequency  in  PWM  mode  operation.  The  module  load  is  satisfied  in  priority,  then  the integrated switching charger will take the remaining current to charge the battery. Additionally, the power path control allows an internal connection from battery to the module with a low series internal ON resistance (40 m typical), in order to supplement additional power to the module when the current demand increases over the external main primary source or when this external source is removed.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 70 of 141 Battery charging is managed in three phases:  Pre-charge constant current (active when the battery is deeply discharged): the battery is charged with a low current, set to 10% of the fast-charge current  Fast-charge constant current: the battery is charged with the maximum current, configured by the value of an external resistor to a value suitable for the application  Constant  voltage: when the  battery  voltage  reaches the  regulated  output  voltage (4.2 V), the current is progressively reduced until the charge termination is done. The charging process ends when the charging current reaches the 10% of the fast-charge current or when the charging timer reaches the value configured by an external capacitor  Using a battery pack with an internal NTC resistor, the MP2617 can monitor the battery temperature to protect the battery from operating under unsafe thermal conditions. Several parameters as the charging current, the charging timings, the input current limit, the input voltage limit, the  system  output  voltage  can  be  easily  set  according  to  the  specific  application  requirements,  as  the  actual electrical characteristics of the battery and the external supply / charging source: proper resistors or capacitors have to be accordingly connected to the related pins of the IC.  C10 C13GNDC12C11 C14TOBY-L2 series71 VCC72 VCC70 VCC+Primary SourceR3U1ENILIMISETTMRAGNDVINC2C112VNTCPGNDSWSYSBATC4R1R2D1θLi-Ion/Li-Pol Battery PackB1C5Li-Ion/Li-Polymer Battery   Charger / Regulator with Power Path ManagmentVCCC3 C6L1BSTD2VLIMR4R5C7 C8 C9C15 Figure 34: Li-Ion (or Li-Polymer) battery charging and power path management application circuit Reference Description Part Number - Manufacturer B1 Li-Ion (or Li-Polymer) battery pack with 10 k NTC Various manufacturer C1, C5, C6 22 µF Capacitor Ceramic X5R 1210 10% 25 V GRM32ER61E226KE15 - Murata C2, C4, C11 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R61A104KA01 - Murata C3 1 µF Capacitor Ceramic X7R 0603 10% 25 V GRM188R71E105KA12 - Murata C7, C13 68 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H680JA01 - Murata C8, C14 15 pF Capacitor Ceramic C0G 0402 5% 25 V GRM1555C1E150JA01 - Murata C9, C15 8.2 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H8R2DZ01 - Murata C10 330 µF Capacitor Tantalum D_SIZE 6.3 V 45 m T520D337M006ATE045 - KEMET C12 10 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C103KA01 - Murata D1, D2 Low Capacitance ESD Protection CG0402MLE-18G - Bourns R1, R3, R5 10 k Resistor 0402 5% 1/16 W RC0402JR-0710KL - Yageo Phycomp R2 1.0 k Resistor 0402 5% 0.1 W RC0402JR-071K0L - Yageo Phycomp R4 22 k Resistor 0402 5% 1/16 W RC0402JR-0722KL - Yageo Phycomp L1 1.2 µH Inductor 6 A 21 m 20% 7447745012 - Wurth U1 Li-Ion/Li-Polymer Battery DC/DC Charger / Regulator with integrated Power Path Management function MP2617 - Monolithic Power Systems (MPS) Table 19: Suggested components for Li-Ion (or Li-Polymer) battery charging and power path management application circuit
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 71 of 141 2.2.1.9 Guidelines for VCC or 3.3Vaux supply layout design Good  connection  of  the  module  VCC  or  3.3Vaux  pins  with  DC  supply  source  is  required  for  correct  RF performance. Guidelines are summarized in the following list:  All the available VCC / 3.3Vaux pins must be connected to the DC source  VCC / 3.3Vaux connection must be as wide as possible and as short as possible  Any series component with Equivalent Series Resistance (ESR) greater than few milliohms must be avoided  VCC /  3.3Vaux  connection  must  be  routed  through  a  PCB  area  separated  from  RF  lines  /  parts,  sensitive analog signals and sensitive functional units: it is good practice to interpose at least one layer of PCB ground between the VCC / 3.3Vaux track and other signal routing  Coupling between VCC / 3.3Vaux and digital lines, especially USB, must be avoided.  The tank bypass capacitor with low ESR for current spikes smoothing described in section 2.2.1.6 should be placed close to the VCC / 3.3Vaux pins. If the main DC source is a switching DC-DC converter, place the large capacitor close to  the DC-DC  output  and minimize  VCC / 3.3Vaux track length. Otherwise consider using separate capacitors for DC-DC converter and module tank capacitor  The  bypass  capacitors  in  the  pF  range  described  in  Figure  31  and  Table  17  should  be  placed  as  close  as possible  to  the  VCC /  3.3Vaux  pins.  This  is  highly  recommended  if  the  application  device  integrates  an internal antenna  Since VCC / 3.3Vaux input provide the supply to RF Power Amplifiers, voltage ripple at high frequency may result in unwanted spurious modulation of transmitter RF signal. This is more likely to happen with switching DC-DC converters, in which case it is better to select the highest operating frequency for the switcher and add a large L-C filter before connecting to the TOBY-L2 and MPCI-L2 series modules in the worst case  If VCC / 3.3Vaux is protected by transient voltage suppressor to ensure that the voltage maximum ratings are  not  exceeded,  place  the  protecting  device  along  the  path  from  the  DC  source  toward  the  module, preferably closer to the DC source (otherwise protection functionality may be compromised)  2.2.1.10 Guidelines for grounding layout design Good connection of the module GND pins with application board solid ground layer is required for correct RF performance. It significantly reduces EMC issues and provides a thermal heat sink for the module.  Connect each GND pin with application board solid GND layer. It is strongly recommended that each GND pad surrounding VCC pins have one or more dedicated via down to the application board solid ground layer  The VCC supply current flows back to main DC source through GND as ground current: provide adequate return path with suitable uninterrupted ground plane to main DC source  It is recommended to implement one layer of the application board as ground plane as wide as possible  If  the  application  board  is  a  multilayer  PCB,  then  all the  board  layers  should  be  filled  with  GND  plane  as much as possible and each GND area should be connected  together with complete via stack down to  the main ground layer of the board  If the whole application device is composed by more than one PCB, then it is required to provide a good and solid ground connection between the GND areas of all the different PCBs  Good grounding of GND pads also ensures thermal heat sink. This is critical during connection, when the real  network  commands  the  module  to  transmit  at  maximum  power:  proper  grounding  helps  prevent module overheating.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 72 of 141 2.2.2 RTC supply output (V_BCKP)  The RTC supply V_BCKP pin is not available on MPCI-L2 series modules.  2.2.2.1 Guidelines for V_BCKP circuit design TOBY-L2 series modules provide the V_BCKP RTC supply input/output, which can be mainly used to:   Provide RTC back-up when VCC supply is removed  If RTC timing is required to run for a time interval of T [s] when VCC supply is removed, place a capacitor with a nominal capacitance of C [µF] at the V_BCKP pin. Choose the capacitor using the following formula: C [µF] = (Current_Consumption [µA] x T [s]) / Voltage_Drop [V] = 1.25 x T [s]  For example, a 100 µF capacitor can be placed at V_BCKP to provide RTC backup holding the V_BCKP voltage within its valid range for around  80 s at 25 °C, after the VCC supply is removed.  If a longer buffering time is required, a 70 mF super-capacitor can be placed at V_BCKP, with a 4.7 k series resistor to hold the V_BCKP voltage within its valid range for approximately 15 hours at 25 °C, after the VCC supply is removed. The purpose of the series resistor is to limit the capacitor charging current due to the large capacitor specifications, and also to  let  a  fast  rise  time  of  the  voltage  value  at  the  V_BCKP  pin  after  VCC  supply  has  been  provided.  These capacitors allow the time reference to run during battery disconnection.  TOBY-L2 seriesC1(a)3V_BCKPR2TOBY-L2 seriesC2(superCap)(b)3V_BCKPD3TOBY-L2 seriesB3(c)3V_BCKP Figure 35: Real time clock supply (V_BCKP) application circuits: (a) using a 100 µF capacitor to let the RTC run for ~80 s after VCC removal; (b) using a 70 mF capacitor to let RTC run for ~15 hours after VCC removal; (c) using a non-rechargeable battery Reference Description Part Number - Manufacturer C1 100 µF Tantalum Capacitor GRM43SR60J107M - Murata R2 4.7 kΩ Resistor 0402 5% 0.1 W  RC0402JR-074K7L - Yageo Phycomp C2 70 mF Capacitor  XH414H-IV01E - Seiko Instruments Table 20: Example of components for V_BCKP buffering  If very long buffering time is required to allow the RTC time reference to run during a disconnection of the VCC supply,  then  an  external  battery  can  be  connected  to  V_BCKP  pin.  The  battery  should  be  able  to  provide  a proper  nominal  voltage and  must  never  exceed the  maximum  operating voltage  for  V_BCKP  (specified  in  the Input characteristics of Supply/Power pins table in TOBY-L2 series Data Sheet [1]). The connection of the battery to  V_BCKP  should  be  done  with  a  suitable  series  resistor  for  a  rechargeable  battery,  or  with  an  appropriate series diode  for  a  non-rechargeable  battery. The  purpose  of  the  series resistor  is to limit  the  battery  charging current due to the battery specifications, and also to allow a fast rise time of the voltage value at the  V_BCKP pin after the VCC supply has been provided. The purpose of the series diode is to avoid a current flow from the module V_BCKP pin to the non-rechargeable battery.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 73 of 141  If  the  RTC  timing  is  not  required  when  the  VCC  supply  is  removed,  it  is  not  needed  to  connect  the V_BCKP pin to an external capacitor or battery. In this case the date and time are not updated when VCC is disconnected.  If  VCC is always supplied,  then the  internal regulator  is supplied from the main supply and there is no need for an external component on V_BCKP.  Combining  a  cellular  module  with  a  u-blox  GNSS  positioning  receiver,  the  positioning  receiver  VCC  supply  is controlled by the cellular module by means of the “GNSS supply enable” function provided by the GPIO2 of the cellular module. In this case the V_BCKP supply output of the cellular module can be connected to the V_BCKP backup  supply  input  pin  of  the  GNSS  receiver  to  provide  the  supply  for  the  positioning  real  time  clock  and backup RAM when the VCC supply of the cellular module is within its operating range and the VCC supply of the GNSS receiver is disabled. This enables the u-blox GNSS receiver to recover from a power breakdown with either a hot start or a warm start (depending on the duration of the  positioning VCC outage) and to maintain the configuration settings saved in the backup RAM. See section 2.6.3 for more details regarding the application circuit with a u-blox GNSS receiver.  V_BCKP  supply  output  pin  provides  internal  short  circuit  protection  to  limit  start-up  current  and  protect  the device in short circuit situations. No additional external short circuit protection is required.   Do not apply loads which might exceed the limit for maximum available current from V_BCKP supply (see TOBY-L2 series Data Sheet [1]) as this can cause malfunctions in internal circuitry.  ESD sensitivity rating of the V_BCKP supply pin is 1 kV (Human Body Model according to JESD22-A114). Higher  protection  level  could  be  required  if  the  line  is  externally  accessible  and  it  can  be  achieved  by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) close to the accessible point.  2.2.2.2 Guidelines for V_BCKP layout design V_BCKP supply requires careful layout: avoid injecting noise on this voltage domain as it may affect the stability of the internal circuitry.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 74 of 141 2.2.3 Generic digital interfaces supply output (V_INT)   The generic digital interfaces supply V_INT pin is not available on MPCI-L2 series modules.  2.2.3.1 Guidelines for V_INT circuit design TOBY-L2 series provide the V_INT generic digital interfaces 1.8 V supply output, which can be mainly used to:  Indicate when the module is switched on (as described in sections 1.6.1, 1.6.2)  Pull-up SIM detection signal (see section 2.5 for more details)  Supply voltage translators to connect 1.8 V module generic digital interfaces to 3.0 V devices (e.g. see 2.6.2)  Pull-up DDC (I2C) interface signals (see section 2.6.3 for more details)  Supply a 1.8 V u-blox 6 or subsequent u-blox GNSS receiver generation (see section 2.6.3 for more details)  V_INT supply output pin provides internal short circuit protection to limit start-up current and protect the device in short circuit situations. No additional external short circuit protection is required.   Do not apply loads which might exceed the limit for maximum available current from V_INT supply (see the TOBY-L2 series Data Sheet [1]) as this can cause malfunctions in internal circuitry.  Since  the  V_INT  supply  is  generated  by  an  internal  switching  step-down  regulator,  the  V_INT  voltage ripple  can  range  as  specified  in  the  TOBY-L2  series  Data  Sheet [1]:  it  is  not  recommended  to  supply sensitive analog circuitry without adequate filtering for digital noise.  V_INT can only be used as an output: do not connect any external supply source on V_INT.  ESD sensitivity rating of the  V_INT  supply pin is 1  kV  (Human Body Model according  to JESD22-A114). Higher  protection  level  could  be  required  if  the  line  is  externally  accessible  and  it  can  be  achieved  by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) close to the accessible point.  It is recommended to  provide direct  access  to  the  V_INT pin  on  the  application  board by  means  of  an accessible test point directly connected to the V_INT pin.  2.2.3.2 Guidelines for V_INT layout design V_INT supply output is generated by an integrated switching step-down converter. Because of this, it can be a source of noise: avoid coupling with sensitive signals.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 75 of 141 2.3 System functions interfaces 2.3.1 Module power-on (PWR_ON)  The PWR_ON input pin is not available on MPCI-L2 series modules.  2.3.1.1 Guidelines for PWR_ON circuit design TOBY-L2 series PWR_ON input is equipped with an internal active pull-up resistor to the VCC module supply as described in Figure 36: an external pull-up resistor is not required and should not be provided.  If  connecting  the  PWR_ON  input  to  a  push  button,  the  pin  will  be  externally  accessible  on  the  application device. According to EMC/ESD requirements of the application, an additional ESD protection should be provided close to the accessible point, as described in Figure 36 and Table 21.   ESD sensitivity rating of the PWR_ON pin is 1 kV (Human Body Model according to JESD22-A114). Higher protection  level  can  be  required  if  the  line  is  externally  accessible  on  the  application  board,  e.g.  if  an accessible push button is directly connected to PWR_ON pin, and it can be achieved by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor) close to the accessible point.  An open drain or open collector output is suitable to drive the PWR_ON input from an application processor as PWR_ON input is equipped with an internal active pull-up resistor to the VCC supply, as described in Figure 36. A compatible  push-pull output  of an application processor  can  also be  used. In  any  case,  take care to  set the proper level in all the possible scenarios to avoid an inappropriate module switch-on.  TOBY-L2 series50 kVCC20 PWR_ONPower-on push buttonESDOpen Drain OutputApplication ProcessorTOBY-L2 series50 kVCC20 PWR_ONTP TP Figure 36: PWR_ON application circuits using a push button and an open drain output of an application processor Reference Description Remarks ESD CT0402S14AHSG - EPCOS Varistor array for ESD protection Table 21: Example ESD protection component for the PWR_ON application circuit   It is recommended to provide direct access to the PWR_ON pin on the application board by means of an accessible test point directly connected to the PWR_ON pin.  2.3.1.2 Guidelines for PWR_ON layout design The power-on circuit (PWR_ON) requires careful layout since it is the sensitive input  available to switch on the TOBY-L2 modules. It is required to ensure that the voltage level is well defined during operation and no transient noise is coupled on this line, otherwise the module might detect a spurious power-on request.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 76 of 141 2.3.2 Module reset (RESET_N or PERST#) 2.3.2.1 Guidelines for RESET_N and PERST# circuit design The  TOBY-L2  series  RESET_N  is  equipped  with  an  internal  pull-up  to  the  VCC  supply  and  the  MPCI-L2  series PERST#  is  equipped  with  an  internal  pull-up  to  the  3.3  V  rail,  as  described  in  Figure  37.  An  external  pull-up resistor is not required and should not be provided. If  connecting  the  RESET_N  or  PERST#  input  to  a  push  button,  the  pin  will  be  externally  accessible  on  the application device. According to EMC/ESD requirements of the application, an additional ESD protection device (e.g. the EPCOS CA05P4S14THSG varistor) should be provided close to accessible point on the line connected to this pin, as described in Figure 37 and Table 22.   ESD sensitivity rating of the RESET_N and PERST# pins is 1 kV (HBM according to JESD22-A114). Higher protection  level  can  be  required  if  the  line  is  externally  accessible  on  the  application  board,  e.g.  if  an accessible push button is  directly connected to the RESET_N or  PERST#  pin, and it can be achieved by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor) close to accessible point.  An open drain output is suitable to drive the RESET_N and PERST# inputs from an application processor as they are equipped with an internal pull-up to VCC supply and to the 3.3 V rail respectively, as described in Figure 37. A compatible push-pull output of an application processor can also be used. In any  case,  take care to  set the proper level in all the possible scenarios to avoid an inappropriate module reset, switch-on or switch-off.  TOBY-L2 seriesVCC23 RESET_NPower-on push buttonESDOpen Drain OutputApplication ProcessorTOBY-L2 seriesVCC23 RESET_NTP TP50 k50 kMPCI-L2 series22 PERST#Power-on push buttonESDOpen Drain OutputApplication ProcessorMPCI-L2 series22 PERST#45 k45 k3V3 3V3 Figure 37: RESET_N and PERST# application circuits using a push button and an open drain output of an application processor Reference Description Remarks ESD Varistor for ESD protection CT0402S14AHSG - EPCOS Table 22: Example of ESD protection component for the RESET_N and PERST# application circuits   If the external reset function is not required by the customer application, the  RESET_N input pin can be left  unconnected  to  external  components,  but  it  is  recommended  providing  direct  access  on  the application board by means of an accessible test point directly connected to the RESET_N pin.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 77 of 141 2.3.2.2 Guidelines for RESET_N and PERST# layout design The RESET_N and PERST# circuits require careful layout due to the pin function: ensure that the voltage level is well defined during operation and no transient noise is coupled on this line, otherwise the module might detect a spurious reset request. It is recommended to keep the connection line to RESET_N and PERST# pins as short as possible.  2.3.3 Module configuration selection by host processor  The HOST_SELECT0 and HOST_SELECT1 pins are not available on MPCI-L2 series modules.  2.3.3.1 Guidelines for HOST_SELECTx circuit design  The  functionality  of  the  HOST_SELECT0  and  HOST_SELECT1  pins  is  not  supported  by  the  TOBY-L2x0-00S  product  version:  the  two  input  pins  should  be  not  driven  by  the  host  application processor.   TOBY-L2 series modules include two input pins (HOST_SELECT0 and HOST_SELECT1) for the selection of the module configuration by the host application processor.   Guidelines  for  HOST_SELECT0  and  HOST_SELECT1  pins  circuit  design  will  be  described  in  detail  in  a successive release of the document.   Do not apply voltage to  HOST_SELECT0 and HOST_SELECT1  pins before the switch-on of their supply source (V_INT), to avoid latch-up of circuits and allow a proper boot of the module. If the external signals connected to the cellular module cannot be tri-stated or set low, insert a multi channel digital switch (e.g. TI  SN74CB3Q16244,  TS5A3159,  or  TS5A63157)  between  the  two-circuit  connections  and  set  to  high impedance before V_INT switch-on.  ESD sensitivity rating of the HOST_SELECT0 and HOST_SELECT1 pins is 1 kV (HBM as per JESD22-A114). Higher protection level could be required if  the lines are  externally accessible  and it can  be achieved by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) close to accessible points  If  the  HOST_SELECT0  and  HOST_SELECT1  pins  are  not  used,  they  can  be  left  unconnected  on  the application board.  2.3.3.2 Guidelines for HOST_SELECTx layout design The input pins for the selection of the module configuration by the host application processor (HOST_SELECT0 and HOST_SELECT1) are generally not critical for layout.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 78 of 141 2.4 Antenna interface TOBY-L2 and MPCI-L2 series modules provide two RF interfaces for connecting the external antennas:  The ANT1 pin represents the primary RF input/output for LTE/3G/2G RF signals transmission and reception.   The ANT2 pin represents the secondary RF input for LTE MIMO 2 x 2 or 3G Rx diversity RF signals reception.  Both the ANT1 and the ANT2 pins have a nominal characteristic impedance of 50  and must be connected to the related antenna through a 50  transmission line to allow proper transmission / reception of RF signals.   Two antennas (one connected to ANT1 pin and one connected to ANT2 pin) must be used to support the Down-Link MIMO 2 x 2 radio technology. This is a required feature for LTE category 4 User Equipments (up to 150 Mb/s Down-Link data rate) according to 3GPP specifications.  2.4.1 Antenna RF interfaces (ANT1 / ANT2) 2.4.1.1 General guidelines for antenna selection and design The antenna is the most critical component to be evaluated. Designers must take care of the antennas from all perspective  at  the  very  start  of  the  design  phase  when  the  physical  dimensions  of  the  application  board  are under analysis/decision, since the RF compliance of the device integrating TOBY-L2 and MPCI-L2 series modules with all the applicable required certification schemes depends on antennas radiating performance.  LTE/3G/2G antennas are typically available in the types of linear monopole or PCB antennas such as patches or ceramic SMT elements.  External antennas (e.g. linear monopole) o External  antennas  basically  do  not  imply  physical  restriction  to  the  design  of  the  PCB  where  the TOBY-L2 and MPCI-L2 series module is mounted. o The radiation performance mainly depends on the antennas. It is required to select antennas with optimal radiating performance in the operating bands. o RF cables should  be  carefully  selected  to have minimum insertion  losses. Additional  insertion loss will  be  introduced  by  low  quality  or  long  cable.  Large  insertion  loss  reduces  both  transmit  and receive radiation performance. o A high quality 50  RF connector provides proper PCB-to-RF-cable transition. It is recommended to strictly follow the layout and cable termination guidelines provided by the connector manufacturer.  Integrated antennas (e.g. patch-like antennas): o Internal integrated antennas imply physical restriction to the design of the PCB:  Integrated antenna excites RF currents  on its counterpoise, typically the PCB ground plane  of the device that becomes part of the antenna: its dimension defines the minimum frequency that can be radiated.  Therefore,  the  ground  plane  can  be  reduced  down  to  a  minimum  size  that  should  be similar to the quarter of the wavelength of the minimum frequency that has to be  radiated, given that the orientation of the ground plane relative to the antenna element must be considered. The isolation between the primary and the secondary antennas has to be as high as possible and the correlation between the 3D radiation patterns of the two antennas has to be as low as possible. In general, a separation of at least a quarter wavelength between the two antennas is required to achieve a good isolation and low pattern correlation. As numerical example, the physical restriction to the PCB design can be considered as following:   Frequency = 750 MHz  Wavelength = 40 cm  Minimum GND plane size = 10 cm
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 79 of 141 o Radiation performance depends on the whole PCB  and antenna system design, including product mechanical design and usage. Antennas should be selected with optimal radiating performance in the operating bands according to the mechanical specifications of the PCB and the whole product. o It is recommended to select a pair of custom antennas designed by an antennas’ manufacturer if the required ground plane dimensions are very small (e.g. less than 6.5 cm long and 4 cm wide). The antenna design process should begin at the start of the whole product design process o It  is  highly  recommended  to  strictly  follow  the  detailed  and  specific  guidelines  provided  by  the antenna  manufacturer  regarding  correct  installation  and  deployment  of  the  antenna  system, including PCB layout and matching circuitry o Further  to  the  custom  PCB  and  product  restrictions,  antennas  may  require  tuning  to  obtain  the required  performance  for  compliance  with  all  the  applicable  required  certification  schemes.  It  is recommended  to  consult  the  antenna  manufacturer  for  the  design-in  guidelines  for  antenna matching relative to the custom application  In both of cases, selecting external or internal antennas, these recommendations should be observed:  Select antennas providing optimal return loss (or V.S.W.R.) figure over all the operating frequencies.  Select antennas providing optimal efficiency figure over all the operating frequencies.  Select antennas providing similar efficiency for both the primary (ANT1) and the secondary (ANT2) antenna.  Select antennas providing appropriate gain figure (i.e. combined antenna directivity and efficiency figure) so that  the  electromagnetic  field  radiation  intensity  do  not  exceed  the  regulatory  limits  specified  in  some countries (e.g. by FCC in the United States, as reported in the section 4.2.2).  Select antennas capable to provide low Envelope Correlation Coefficient between the primary (ANT1) and the secondary (ANT2) antenna: the 3D antenna radiation patterns should have lobes in different directions.  2.4.1.2 Guidelines for antenna RF interface design Guidelines for TOBY-L2 series ANT1 / ANT2 pins RF connection design Proper transition between ANT1 / ANT2 pads and the application board PCB must be provided, implementing the following design-in guidelines for the layout of the application PCB close to the ANT1 / ANT2 pads:  On a multilayer board, the whole layer stack below the RF connection should be free of digital lines  Increase GND keep-out (i.e. clearance, a void area) around the  ANT1 / ANT2 pads, on the top layer of the application  PCB,  to  at  least  250 µm  up  to  adjacent  pads  metal  definition  and  up  to  400 µm  on  the  area below the module, to reduce parasitic capacitance to ground, as described in the left picture in Figure 38  Add GND keep-out (i.e. clearance, a void area) on the buried metal layer below the  ANT1 / ANT2 pads if the top-layer to buried layer dielectric thickness is below 200 µm, to reduce parasitic capacitance to ground, as described in the right picture in Figure 38  Min. 250 µmMin. 400 µm GNDANT1GND clearance on very close buried layerbelow ANT1 padGND clearance on top layer around ANT1 padMin. 250 µmMin. 400 µmGNDANT2GND clearance on very close buried layerbelow ANT2 padGND clearance on top layer around ANT2 pad Figure 38: GND keep-out area on top layer around ANT1 / ANT2 pads and on very close buried layer below ANT1 / ANT2 pads
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 80 of 141 Guidelines for MPCI-L2 series ANT1 / ANT2 receptacles RF connection design The  Hirose  U.FL-R-SMT  RF  receptacles  implemented  on  the  MPCI-L2  series  modules  for  ANT1 /  ANT2  ports require a suitable mated RF plug from the same connector series. Due to its wide usage in the industry, several manufacturers offer compatible equivalents. Table 23 lists some RF connector plugs that fit MPCI-L2 series modules RF connector receptacles, based on the declaration of the respective manufacturers. Only the Hirose has been qualified for the MPCI-L2 series modules; contact other producers to verify compatibility.  Manufacturer Series Remarks Hirose U.FL® Ultra Small Surface Mount Coaxial Connector Recommended I-PEX MHF® Micro Coaxial Connector  Tyco UMCC® Ultra-Miniature Coax Connector  Amphenol RF AMC® Amphenol Micro Coaxial  Lighthorse Technologies, Inc IPX ultra micro-miniature RF connector  Table 23: MPCI-L2 series U.FL compatible plug connector Typically the RF plug is available as a cable assembly: several kinds are available and the user should  select the cable assembly best suited to the application. The key characteristics are:  RF plug type: select U.FL or equivalent  Nominal impedance: 50   Cable thickness: typically from 0.8 mm to 1.37 mm. Select thicker cables to minimize insertion loss  Cable length: standard length is typically 100 mm or 200 mm, custom lengths may be available on request. Select shorter cables to minimize insertion loss  RF connector on the  other side  of the  cable: for example another U.FL (for  board-to-board connection) or SMA (for panel mounting)  For  applications  requiring  an  internal  integrated  SMT  antenna,  it  is  suggested  to  use  a  U-FL-to-U.FL  cable  to provide RF path from the MPCI-L2 series module to PCB strip line or micro strip connected to antenna pads as shown in Figure 39. Take care that the PCB-to-RF-cable transition, strip line and antenna pads must be designed so that  the  characteristic impedance  is  as  close  as possible  to  50 :  see  the  following  subsections for  specific guidelines regarding RF transmission line design and RF termination design. If an external antenna is required, consider that the connector is typically rated for a limited number of insertion cycles. In addition, the RF coaxial cable may be relatively fragile compared to other types of cables. To increase application  ruggedness,  connect  U.FL  to a  more  robust  connector  (e.g. SMA  or  MMCX)  fixed  on panel  or  on flange as shown in Figure 39.  MPCI-L2 seriesBaseboardStripline/Microstrip Internal AntennaBaseboardApplication  Chassis Connector  to External AntennaMPCI-L2 seriesLatch for Mini PCIeLatch for Mini PCIe Figure 39: Example of RF connections, U.FL-to-U.FL cable for internal antenna and U.FL-to-SMA for external antenna
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 81 of 141 Guidelines for RF transmission line design Any RF transmission line, such as the ones from the ANT1 and ANT2 pads up to the related antenna connector or up to the related internal antenna pad, must be designed so that the characteristic impedance is as close as possible to 50 . RF transmission lines can be designed as a micro strip (consists of a conducting strip separated from a ground plane by a dielectric material) or a strip line (consists of a flat strip of metal which is sandwiched between  two parallel ground planes within a dielectric material). The micro strip, implemented as a coplanar waveguide, is the most common configuration for printed circuit board.  Figure 40 and Figure 41 provide two examples of proper 50  coplanar waveguide designs. The first example of RF  transmission  line  can  be  implemented  in  case  of  4-layer  PCB  stack-up  herein  described,  and  the  second example of RF transmission line can be implemented in case of 2-layer PCB stack-up herein described. 35 µm35 µm35 µm35 µm270 µm270 µm760 µmL1 CopperL3 CopperL2 CopperL4 CopperFR-4 dielectricFR-4 dielectricFR-4 dielectric380 µm 500 µm500 µm Figure 40: Example of 50  coplanar waveguide transmission line design for the described 4-layer board layup 35 µm35 µm1510 µmL2 CopperL1 CopperFR-4 dielectric1200 µm 400 µm400 µm Figure 41: Example of 50  coplanar waveguide transmission line design for the described 2-layer board layup If the  two  examples do not match the application PCB  stack-up the 50  characteristic impedance  calculation can be made using the HFSS commercial finite element method solver for electromagnetic structures from Ansys Corporation,  or  using  freeware  tools  like  AppCAD  from  Agilent  (www.agilent.com)  or  TXLine  from  Applied Wave  Research  (www.mwoffice.com),  taking  care  of  the  approximation  formulas  used  by  the  tools  for  the impedance computation. To achieve a 50  characteristic impedance, the width of the transmission line must be chosen depending on:  the thickness of the transmission line itself (e.g. 35 µm in the example of Figure 40 and Figure 41)  the thickness of the dielectric material between the top layer (where the transmission line is routed) and the inner closer layer implementing the ground plane (e.g. 270 µm in Figure 40, 1510 µm in Figure 41)  the  dielectric  constant  of  the  dielectric  material  (e.g.  dielectric  constant  of  the  FR-4  dielectric  material  in Figure 40 and Figure 41)
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 82 of 141  the gap from the transmission line to the adjacent ground plane on the same layer of the transmission line (e.g. 500 µm in Figure 40, 400 µm in Figure 41) If the distance between the transmission line and the adjacent GND area (on the same layer) does not exceed 5 times the track width of the micro strip, use the “Coplanar Waveguide” model for the 50  calculation.  Additionally to the 50  impedance, the following guidelines are recommended for transmission lines design:  Minimize  the  transmission  line length: the  insertion  loss  should  be minimized  as  much  as  possible,  in  the order of a few tenths of a dB,  Add GND keep-out (i.e. clearance, a void area) on buried metal layers below any pad of component present on  the  RF  transmission  lines,  if  top-layer  to  buried  layer  dielectric  thickness  is  below  200 µm,  to  reduce parasitic capacitance to ground,  The transmission lines width and spacing to GND must be uniform and routed as smoothly as possible: avoid abrupt changes of width and spacing to GND,  Add GND stitching vias around transmission lines, as described in Figure 42,  Ensure  solid  metal  connection  of  the  adjacent  metal  layer  on  the  PCB  stack-up  to  main  ground  layer, providing enough vias on the adjacent metal layer, as described in Figure 42,  Route RF transmission lines far from any noise source (as switching supplies and digital lines) and from any sensitive circuit (as USB),  Avoid stubs on the transmission lines,  Avoid signal routing in parallel to transmission lines or crossing the transmission lines on buried metal layer,  Do not route microstrip lines below discrete component or other mechanics placed on top layer  An  example  of  proper  RF  circuit  design  is  reported  in  Figure  42.  In  this  case,  the  ANT1  and  ANT2  pins  are directly connected to SMA connectors by means of proper 50  transmission lines, designed with proper layout.  SMA Connector Primary AntennaSMA Connector Secondary AntennaTOBY-L2 series Figure 42: Suggested circuit and layout for antenna RF circuits on application board
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 83 of 141 Guidelines for RF termination design RF terminations must provide a characteristic impedance of 50  as well as the RF transmission lines up to the RF terminations themselves, to match the characteristic impedance of the ANT1 / ANT2 ports of the modules. However,  real  antennas  do  not  have  perfect  50   load  on  all  the  supported  frequency  bands.  Therefore,  to reduce as much as possible performance degradation due to antennas mismatch, RF terminations must provide optimal return loss (or V.S.W.R.) figure over all the operating frequencies, as summarized in Table 8 and Table 9.  If external antennas are used, the antenna connectors represent the RF termination on the PCB:  Use suitable 50  connectors providing proper PCB-to-RF-cable transition.  Strictly follow the connector manufacturer’s recommended layout, for example:  o SMA  Pin-Through-Hole  connectors  require  GND  keep-out  (i.e.  clearance,  a  void  area)  on  all  the layers around the central pin up to annular pads of the four GND posts, as shown in Figure 42 o U.FL surface mounted  connectors  require no conductive traces (i.e. clearance, a  void area) in the area below the connector between the GND land pads.  Cut out the GND layer under RF connectors and close to buried vias, to remove stray capacitance and thus keep the RF line 50 , e.g. the active pad of UFL connectors needs to have a GND keep-out (i.e. clearance, a void area) at least on first inner layer to reduce parasitic capacitance to ground.  If integrated antennas are used, the RF terminations are represented by the integrated antennas themselves. The following guidelines should be followed:  Use antennas designed by an antenna manufacturer, providing the best possible return loss (or V.S.W.R.).  Provide a ground plane large enough according to the relative integrated antenna requirements. The ground plane of the application PCB can be reduced down to a minimum size that must be similar to one quarter of wavelength of the minimum frequency that has to be radiated. As numerical example,   Frequency = 750 MHz  Wavelength = 40 cm  Minimum GND plane size = 10 cm  It  is  highly  recommended  to  strictly  follow  the  detailed  and  specific  guidelines  provided  by  the  antenna manufacturer  regarding  correct  installation  and  deployment  of  the  antenna  system,  including  PCB  layout and matching circuitry.  Further to the custom PCB and product restrictions, antennas may require a tuning to comply with all the applicable  required  certification schemes.  It  is  recommended  to  consult  the antenna  manufacturer  for  the design-in guidelines for the antenna matching relative to the custom application.  Additionally, these recommendations regarding the antenna system placement must be followed:  Do not place antennas within closed metal case.  Do not place the antennas in close vicinity to end user since the emitted radiation in human tissue is limited by regulatory requirements.  Place the antennas far from sensitive analog systems or employ countermeasures to reduce EMC issues.  Take care of interaction between co-located RF systems since the LTE/3G/2G transmitted power may interact or disturb the performance of companion systems.  Place  the  two  LTE/3G  antennas  providing  low  Envelope  Correlation  Coefficient  (ECC)  between  primary (ANT1)  and  secondary  (ANT2)  antenna:  the  antenna  3D  radiation  patterns  should  have lobes  in  different directions. The ECC between primary and secondary antenna needs to be enough low  to comply with the radiated performance requirements specified by related certification schemes, as indicated in Table 10.  Place the two LTE/3G antennas providing enough high isolation (see Table 10) between primary (ANT1) and secondary (ANT2) antenna. The isolation depends on the distance between antennas (separation of at least a quarter wavelength required for good isolation), antenna type (using antennas with different polarization improves isolation), antenna 3D radiation patterns (uncorrelated patterns improve isolation).
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 84 of 141 Examples of antennas Table 24 lists some examples of possible internal on-board surface-mount antennas.  Manufacturer Part Number Product Name Description Taoglas PCS.06.A Havok GSM / WCDMA / LTE SMD Antenna 698..960 MHz, 1710..2170 MHz, 2500..2690 MHz 42.0 x 10.0 x 3.0 mm    700..960 MHz, 1710..2170 MHz  Taoglas PA.710.A Warrior GSM / WCDMA / LTE SMD Antenna 698..960 MHz, 1710..2170 MHz, 2300..2400 MHz, 2490..2690 MHz  40.0 x 6.0 x 5.0 mm Table 24: Examples of internal surface-mount antennas  Table 25 lists some examples of possible internal off-board PCB-type antennas with cable and connector.  Manufacturer Part Number Product Name Description Taoglas FXUB63.07.0150C  GSM / WCDMA / LTE PCB Antenna with cable and U.FL  698..960 MHz, 1575.42 MHz, 1710..2170 MHz, 2400..2690 MHz 96.0 x 21.0 mm Taoglas FXUB66.07.0150C Maximus GSM / WCDMA / LTE PCB Antenna with cable and U.FL  698..960 MHz, 1390..1435 MHz, 1575.42 MHz, 1710..2170 MHz, 2400..2700 MHz, 3400..3600 MHz, 4800..6000 MHz 120.2 x 50.4 mm Taoglas FXUB70.A.07.C.001  GSM / WCDMA / LTE PCB MIMO Antenna with cables and U.FL  698..960 MHz, 1575.42 MHz, 1710..2170 MHz, 2400..2690 MHz 182.2 x 21.2 mm Ethertronics 5001537 Prestta GSM / WCDMA / LTE PCB Antenna with cable  704..960 MHz, 1710..2170 MHz, 2300..2400 MHz, 2500..2690 MHz 80.0 x 18.0 mm EAD FSQS35241-UF-10 SQ7 GSM / WCDMA / LTE PCB Antenna with cable and U.FL  690..960 MHz, 1710..2170 MHz, 2500..2700 MHz 110.0 x 21.0 mm Table 25: Examples of internal antennas with cable and connector
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 85 of 141 Table 26 lists some examples of possible external antennas.  Manufacturer Part Number Product Name Description Taoglas GSA.8827.A.101111  Phoenix GSM / WCDMA / LTE adhesive-mount Antenna with cable and SMA(M)  698..960 MHz, 1575.42 MHz, 1710..2170 MHz, 2490..2690 MHz 105 x 30 x 7.7 mm Taoglas TG.30.8112  GSM / WCDMA / LTE swivel dipole Antenna with SMA(M)  698..960 MHz, 1575.42 MHz, 1710..2170 MHz, 2400..2700 MHz  148.6 x 49 x 10 mm Laird Tech. TRA6927M3PW-001  GSM / WCDMA / LTE screw-mount Antenna with N-type(F)  698..960 MHz, 1710..2170 MHz, 2300..2700 MHz  83.8 x Ø 36.5 mm Laird Tech. CMS69273  GSM / WCDMA / LTE ceiling-mount Antenna with cable and N-type(F)  698..960 MHz, 1575.42 MHz, 1710..2700 MHz  86 x Ø 199 mm Laird Tech. OC69271-FNM  GSM / WCDMA / LTE pole-mount Antenna with N-type(M)  698..960 MHz, 1710..2690 MHz 248 x Ø 24.5 mm Laird Tech. CMD69273-30NM  GSM / WCDMA / LTE ceiling-mount MIMO Antenna with cables & N-type(M)  698..960 MHz, 1710..2700 MHz  43.5 x Ø 218.7 mm Pulse Electronics WA700/2700SMA  GSM / WCDMA / LTE clip-mount MIMO antenna with cables and SMA(M)  698..960 MHz,1710..2700 MHz 149 x 127 x 5.1 mm Table 26: Examples of external antennas
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 86 of 141 2.4.2 Antenna detection interface (ANT_DET)  Antenna detection interface (ANT_DET) is not available on MPCI-L2 series modules.  Antenna detection interface (ANT_DET) is not supported by the TOBY-L2x0-00S product version.  2.4.2.1 Guidelines for ANT_DET circuit design Figure 43 and Table 27 describe the recommended schematic / components for the antennas detection circuit that  must  be  provided  on  the  application  board  and  for  the  diagnostic  circuit  that  must  be  provided  on  the antennas’ assembly to achieve primary and secondary antenna detection functionality.  Application BoardAntenna CableTOBY-L2 series81ANT175ANT_DET R1C1 D1C2 J1Z0= 50 ohm Z0= 50 ohm Z0= 50 ohmPrimary Antenna AssemblyR2C4L3Radiating ElementDiagnostic CircuitL2L1Antenna Cable87ANT2C3 J2Z0= 50 ohm Z0= 50 ohm Z0= 50 ohmSecondary Antenna AssemblyR3C5L4Radiating ElementDiagnostic Circuit Figure 43: Suggested schematic for antenna detection circuit on application board and diagnostic circuit on antennas assembly Reference Description Part Number - Manufacturer C1 27 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H270J - Murata C2, C3 33 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H330J - Murata D1 Very Low Capacitance ESD Protection PESD0402-140 - Tyco Electronics L1, L2 68 nH Multilayer Inductor 0402 (SRF ~1 GHz) LQG15HS68NJ02 - Murata R1 10 k Resistor 0402 1% 0.063 W RK73H1ETTP1002F - KOA Speer J1, J2 SMA Connector 50  Through Hole Jack SMA6251A1-3GT50G-50 - Amphenol C4, C5 22 pF Capacitor Ceramic C0G 0402 5% 25 V  GRM1555C1H220J - Murata L3, L4 68 nH Multilayer Inductor 0402 (SRF ~1 GHz) LQG15HS68NJ02 - Murata R2, R3 15 k Resistor for Diagnostic Various Manufacturers Table 27: Suggested components for antenna detection circuit on application board and diagnostic circuit on antennas assembly  The antenna detection circuit and diagnostic circuit suggested in Figure 43 and Table 27 are explained here:  When antenna detection is forced by AT+UANTR command, ANT_DET generates a DC current measuring the resistance (R2 // R3) from antenna connectors (J1, J2) provided on the application board to GND.  DC blocking capacitors are needed at the ANT1 / ANT2 pins (C2, C3) and at the antenna radiating element (C4, C5) to decouple the DC current generated by the ANT_DET pin.  Choke inductors with a Self Resonance Frequency (SRF) in the range of 1 GHz are needed in series at the ANT_DET  pin  (L1,  L2)  and  in  series  at  the  diagnostic  resistor  (L3,  L4),  to  avoid  a  reduction  of  the  RF performance of the system, improving the RF isolation of the load resistor.   Additional components (R1, C1 and D1 in Figure 43) are needed at the ANT_DET pin as ESD protection  The ANT1 / ANT2 pins must be connected to the antenna connector by means of a transmission line with nominal characteristics impedance as close as possible to 50 .
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 87 of 141 The DC impedance at  RF port for some antennas  may be  a  DC  open  (e.g.  linear monopole) or  a DC  short to reference GND (e.g. PIFA antenna). For those antennas, without the diagnostic circuit of Figure 43, the measured DC  resistance  is  always  at  the  limits  of  the  measurement  range  (respectively  open  or  short),  and  there  is  no means  to  distinguish  between  a  defect  on  antenna  path  with  similar  characteristics  (respectively:  removal  of linear antenna or RF cable shorted to GND for PIFA antenna). Furthermore, any other  DC signal injected to the RF connection from  ANT connector to radiating element will alter the measurement and produce invalid results for antenna detection.   It is recommended to use an antenna with a built-in diagnostic resistor in the range from 5 k to 30 k to  assure  good  antenna  detection  functionality  and  avoid  a  reduction  of  module  RF  performance.  The choke inductor should exhibit a parallel Self Resonance Frequency (SRF) in the range of 1 GHz to improve the RF isolation of load resistor.  For example: Consider  an  antenna  with  built-in  DC  load  resistor  of  15  k.  Using  the  +UANTR  AT  command,  the  module reports the resistance value evaluated from the antenna connector provided on the application board to GND:  Reported  values  close  to  the  used  diagnostic resistor  nominal  value  (i.e.  values from  13  k  to  17  k  if  a 15 k diagnostic resistor is used) indicate that the antenna is properly connected.  Values  close  to  the  measurement  range  maximum  limit  (approximately  50  k)  or  an  open-circuit “over range” report (see u-blox AT Commands Manual [3]) means that that the antenna is not connected or the RF cable is broken.  Reported values below the measurement range minimum limit (1 k) highlights a short to GND at antenna or along the RF cable.  Measurement inside the valid measurement range and outside the expected range may indicate an improper connection, damaged antenna or wrong value of antenna load resistor for diagnostic.  Reported  value  could  differ  from  the  real  resistance  value  of  the  diagnostic  resistor  mounted  inside  the antenna assembly due to antenna cable length, antenna cable capacity and the used measurement method.   If  the  primary  /  secondary  antenna  detection  function  is  not  required  by  the  customer  application,  the ANT_DET  pin  can  be  left  not  connected  and  the  ANT1 /  ANT2  pins  can  be  directly  connected  to  the related antenna connector by means of a 50  transmission line as described in Figure 42.  2.4.2.1 Guidelines for ANT_DET layout design The recommended layout for the primary antenna detection circuit to be provided on the application board to achieve  the  primary  antenna  detection  functionality,  implementing  the  recommended  schematic  described  in Figure 43 and Table 27, is explained here:  The ANT1 / ANT2 pins have to be connected to the antenna connector by means of a 50  transmission line, implementing the design guidelines described in section  2.4.1 and the recommendations of the SMA connector manufacturer.  DC blocking capacitor at ANT1 / ANT2 pins (C2, C3) has to be placed in series to the 50  RF line.  The ANT_DET pin has to be connected to the 50  transmission line by means of a sense line.  Choke inductors in series at the  ANT_DET pin (L1, L2) have to be placed so that one pad is on the  50  transmission line and the other pad represents the start of the sense line to the ANT_DET pin.  The additional components (R1, C1 and D1) on the ANT_DET line have to be placed as ESD protection.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 88 of 141 2.5 SIM interface  SIM detection interface (GPIO5) is not available on MPCI-L2 series modules.  SIM detection interface (GPIO5) is not supported by the TOBY-L2x0-00S product version: the pin should not be driven by any external device.  2.5.1 Guidelines for SIM circuit design Guidelines for SIM cards, SIM connectors and SIM chips selection The ISO/IEC 7816, the ETSI TS 102 221 and the ETSI TS 102 671 specifications define the physical, electrical and functional  characteristics  of  Universal  Integrated  Circuit  Cards  (UICC),  which  contains  the  Subscriber Identification  Module  (SIM)  integrated  circuit  that  securely  stores  all  the  information  needed  to  identify  and authenticate subscribers over the LTE/3G/2G network.  Removable UICC / SIM card contacts mapping is defined by ISO/IEC 7816 and ETSI TS 102 221 as follows:  Contact C1 = VCC (Supply)           It must be connected to VSIM or UIM_PWR  Contact C2 = RST (Reset)           It must be connected to SIM_RST or UIM_RESET  Contact C3 = CLK (Clock)           It must be connected to SIM_CLK or UIM_CLK  Contact C4 = AUX1 (Auxiliary contact)       It must be left not connected  Contact C5 = GND (Ground)          It must be connected to GND  Contact C6 = VPP (Programming supply)       It must be connected to VSIM or UIM_PWR  Contact C7 = I/O (Data input/output)        It must be connected to SIM_IO or UIM_DATA  Contact C8 = AUX2 (Auxiliary contact)       It must be left not connected A removable SIM card can have 6 contacts (C1, C2, C3, C5, C6, C7) or 8 contacts, also including the auxiliary contacts C4 and C8 . Only 6 contacts are required and must be connected to the module SIM interface. Removable SIM cards are suitable for applications requiring a change of SIM card during the product lifetime.  A SIM  card holder can have  6 or  8 positions  if a mechanical card presence detector  is not provided,  or it can have 6+2 or 8+2 positions if two additional pins relative to the normally-open mechanical switch integrated in the SIM connector for the mechanical card presence detection are  provided. Select a SIM connector providing 6+2 or 8+2 positions if the optional SIM detection feature (not available on MPCI-L2 series) is required by the custom application, otherwise a connector without integrated mechanical presence switch can be selected.  Solderable UICC / SIM chip contact mapping (M2M UICC Form Factor) is defined by ETSI TS 102 671 as:  Case Pin 8 = UICC Contact C1 = VCC (Supply)     It must be connected to VSIM or UIM_PWR  Case Pin 7 = UICC Contact C2 = RST (Reset)       It must be connected to SIM_RST or UIM_RESET  Case Pin 6 = UICC Contact C3 = CLK (Clock)       It must be connected to SIM_CLK or UIM_CLK  Case Pin 5 = UICC Contact C4 = AUX1 (Aux.contact)     It must be left not connected  Case Pin 1 = UICC Contact C5 = GND (Ground)     It must be connected to GND  Case Pin 2 = UICC Contact C6 = VPP (Progr. supply)    It must be connected to VSIM or UIM_PWR  Case Pin 3 = UICC Contact C7 = I/O (Data I/O)    It must be connected to SIM_IO or UIM_DATA  Case Pin 4 = UICC Contact C8 = AUX2 (Aux. contact)    It must be left not connected A solderable SIM chip has 8 contacts and can also include the auxiliary contacts C4 and C8 for other uses, but only 6 contacts are required and must be connected to the module SIM card interface as described above. Solderable SIM chips are suitable for M2M applications where it is not required to change the SIM once installed.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 89 of 141 Guidelines for single SIM card connection without detection A removable SIM card placed in a SIM card holder must be connected to the SIM card interface of TOBY-L2 and MPCI-L2 series modules as described in Figure 44, where the optional SIM detection feature is not implemented. Follow these guidelines to connect the module to a SIM connector without SIM presence detection:  Connect the UICC / SIM contacts C1 (VCC) and C6 (VPP) to the VSIM / UIM_PWR pin of the module.  Connect the UICC / SIM contact C7 (I/O) to the SIM_IO / UIM_DATA pin of the module.  Connect the UICC / SIM contact C3 (CLK) to the SIM_CLK / UIM_CLK pin of the module.  Connect the UICC / SIM contact C2 (RST) to the SIM_RST / UIM_RESET pin of the module.  Connect the UICC / SIM contact C5 (GND) to ground.  Provide a 100 nF bypass capacitor (e.g. Murata GRM155R71C104K) on SIM supply line, close to the relative pad of the SIM connector, to prevent digital noise.  Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GRM1555C1H470J) on each SIM line, very close to each related pad of the SIM connector, to prevent RF coupling especially in case the RF antenna is placed closer than 10 - 30 cm from the SIM card holder.  Provide  a  very  low  capacitance  (i.e.  less  than  10  pF)  ESD  protection  (e.g.  Tyco  PESD0402-140)  on  each externally accessible SIM line, close to each relative pad of the SIM connector. ESD sensitivity rating of the SIM interface pins is 1 kV (HBM). So that, according to EMC/ESD requirements of the custom application, higher protection level can be required if the lines are externally accessible on the application device.  Limit capacitance  and  series  resistance  on each  SIM  signal to  match  the  SIM requirements (27.7  ns  is  the maximum allowed rise time on clock line, 1.0 µs is the maximum allowed rise time on data and reset lines).  TOBY-L2 series59VSIM57SIM_IO56SIM_CLK58SIM_RSTSIM CARD HOLDERC5C6C7C1C2C3SIM Card Bottom View (contacts side)C1VPP (C6)VCC (C1)IO (C7)CLK (C3)RST (C2)GND (C5)C2 C3 C5J1C4 D1 D2 D3 D4C8C4MPCI-L2 series8UIM_PWR10UIM_DATA12UIM_CLK14UIM_RESETSIM CARD HOLDERC5C6C7C1C2C3SIM Card Bottom View (contacts side)C1VPP (C6)VCC (C1)IO (C7)CLK (C3)RST (C2)GND (C5)C2 C3 C5J1C4 D1 D2 D3 D4C8C4 Figure 44: Application circuits for the connection to a single removable SIM card, with SIM detection not implemented Reference Description Part Number - Manufacturer C1, C2, C3, C4 47 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H470JA01 - Murata C5 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C104KA01 - Murata D1, D2, D3, D4 Very Low Capacitance ESD Protection PESD0402-140 - Tyco Electronics  J1 SIM Card Holder, 6 p, without card presence switch Various manufacturers, as C707 10M006 136 2 - Amphenol Table 28: Example of components for the connection to a single removable SIM card, with SIM detection not implemented
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 90 of 141 Guidelines for single SIM chip connection A  solderable  SIM  chip  (M2M  UICC  Form  Factor)  must  be  connected  the  SIM  card  interface  of  TOBY-L2  and MPCI-L2 series modules as described in Figure 45. Follow these guidelines to connect the module to a solderable SIM chip without SIM presence detection:  Connect the UICC / SIM contacts C1 (VCC) and C6 (VPP) to the VSIM / UIM_PWR pin of the module.  Connect the UICC / SIM contact C7 (I/O) to the SIM_IO / UIM_DATA pin of the module.  Connect the UICC / SIM contact C3 (CLK) to the SIM_CLK / UIM_CLK pin of the module.  Connect the UICC / SIM contact C2 (RST) to the SIM_RST / UIM_RESET pin of the module.  Connect the UICC / SIM contact C5 (GND) to ground.  Provide  a  100  nF  bypass  capacitor  (e.g.  Murata  GRM155R71C104K)  at  the  SIM  supply  line  close  to  the relative pad of the SIM chip, to prevent digital noise.   Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GRM1555C1H470J) on each SIM line, to prevent RF coupling especially in case the RF antenna is placed closer than 10 - 30 cm from the SIM lines.  Limit capacitance  and  series  resistance  on each  SIM  signal to match  the  SIM requirements  (27.7  ns  is the maximum allowed rise time on clock line, 1.0 µs is the maximum allowed rise time on data and reset lines).  TOBY-L2 series59VSIM57SIM_IO56SIM_CLK58SIM_RSTSIM CHIPSIM ChipBottom View (contacts side)C1VPP (C6)VCC (C1)IO (C7)CLK (C3)RST (C2)GND (C5)C2 C3 C5U1C4283671C1 C5C2 C6C3 C7C4 C887651234MPCI-L2 series8UIM_PWR10UIM_DATA12UIM_CLK14UIM_RESETSIM CHIPSIM ChipBottom View (contacts side)C1VPP (C6)VCC (C1)IO (C7)CLK (C3)RST (C2)GND (C5)C2 C3 C5U1C4283671C1 C5C2 C6C3 C7C4 C887651234 Figure 45: Application circuits for the connection to a single solderable SIM chip, with SIM detection not implemented Reference Description Part Number - Manufacturer C1, C2, C3, C4 47 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H470JA01 - Murata C5 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C104KA01 - Murata U1 SIM chip (M2M UICC Form Factor) Various Manufacturers Table 29: Example of components for the connection to a single solderable SIM chip, with SIM detection not implemented
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 91 of 141 Guidelines for single SIM card connection with detection A  removable  SIM  card  placed  in  a  SIM  card  holder  must  be  connected  to  the  SIM  card  interface  of  TOBY-L2 modules as described in Figure 46, where the optional SIM card detection feature is implemented. Follow these guidelines to connect the module to a SIM connector implementing SIM presence detection:  Connect the UICC / SIM contacts C1 (VCC) and C6 (VPP) to the VSIM pin of the module.  Connect the UICC / SIM contact C7 (I/O) to the SIM_IO pin of the module.  Connect the UICC / SIM contact C3 (CLK) to the SIM_CLK pin of the module.  Connect the UICC / SIM contact C2 (RST) to the SIM_RST pin of the module.  Connect the UICC / SIM contact C5 (GND) to ground.  Connect one pin of the mechanical switch integrated in the SIM connector (e.g. the SW2 pin as described in Figure 46) to the GPIO5 input pin of the module.  Connect  the  other  pin  of  the  mechanical  switch  integrated  in  the  SIM  connector  (e.g.  the  SW1  pin  as described in Figure 46) to the V_INT 1.8 V supply output of the module by means of a strong (e.g. 1 k) pull-up resistor, as the R1 resistor in Figure 46.  Provide a weak (e.g. 470 k) pull-down resistor at the SIM detection line, as the R2 resistor in Figure 46  Provide  a  100  nF  bypass  capacitor  (e.g.  Murata  GRM155R71C104K)  at  the  SIM  supply  line,  close  to  the related pad of the SIM connector, to prevent digital noise.   Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GRM1555C1H470J) on each SIM line, very close to each related pad of the SIM connector, to prevent RF coupling especially in case the RF antenna is placed closer than 10 - 30 cm from the SIM card holder.  Provide  a  very  low  capacitance  (i.e.  less  than  10  pF)  ESD  protection  (e.g.  Tyco  PESD0402-140)  on  each externally accessible SIM line, close to each  related pad of the SIM connector: ESD sensitivity rating of the SIM interface pins is 1 kV (HBM), so that, according to the EMC/ESD requirements of the custom application, higher protection level can be required if the lines are externally accessible on the application device.  Limit capacitance  and  series  resistance  on each  SIM  signal to match  the  SIM requirements (27.7  ns  is  the maximum allowed rise time on clock line, 1.0 µs is the maximum allowed rise time on data and reset lines).  TOBY-L2 series5V_INT60GPIO5SIM CARD HOLDERC5C6C7C1C2C3SIM Card Bottom View (contacts side)C1VPP (C6)VCC (C1)IO (C7)CLK (C3)RST (C2)GND (C5)C2 C3 C5J1C4SW1SW2D1 D2 D3 D4 D5 D6R2R1C8C4TP59VSIM57SIM_IO56SIM_CLK58SIM_RST Figure 46: Application circuit for the connection to a single removable SIM card, with SIM detection implemented Reference Description Part Number - Manufacturer C1, C2, C3, C4 47 pF Capacitor Ceramic C0G 0402 5% 50 V GRM1555C1H470JA01 - Murata C5 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C104KA01 - Murata D1, … , D6 Very Low Capacitance ESD Protection PESD0402-140 - Tyco Electronics  R1 1 k Resistor 0402 5% 0.1 W RC0402JR-071KL - Yageo Phycomp R2 470 k Resistor 0402 5% 0.1 W RC0402JR-07470KL- Yageo Phycomp J1 SIM Card Holder, 6 + 2 p, with card presence switch Various manufacturers, as CCM03-3013LFT R102 - C&K  Table 30: Example of components for the connection to a single removable SIM card, with SIM detection implemented
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 92 of 141 Guidelines for dual SIM card / chip connection  Two SIM card / chip can be connected to the SIM interface of TOBY-L2 and MPCI-L2 series modules as described in the application circuits of Figure 47. TOBY-L2 and MPCI-L2 series modules do not support the usage of two SIM at the same time, but two SIM can be populated on the application board, providing a proper switch to connect only the first or only the second SIM at a time to the SIM interface of the modules, as described in Figure 47. TOBY-L2x0-00S  and  MPCI-L2  modules  do  not  support  SIM  hot  insertion  /  removal:  the  physical  connection between the external SIM and the module has to be provided before the module boot and then held for normal operation. Switching from one SIM to another can only be properly done within one of these two time periods:  after module switch-off by the AT+CPWROFF and before module switch-on by PWR_ON  after network deregistration by AT+COPS=2 and before module reset by AT+CFUN=16  TOBY-L2 modules (except TOBY-L2x0-00S) support SIM hot insertion / removal on the GPIO5 pin: if the feature is enabled using the specific AT commands (see sections 1.8.2 and 1.11, and u-blox AT Commands Manual [3], +UGPIOC,  +UDCONF commands), the  switch  from  first  SIM to the  second SIM  can  be  properly  done  when a Low  logic  level  is  present  on  the  GPIO5 pin  (‘SIM  not  inserted’  =  SIM  interface  not  enabled),  without  the necessity of a module re-boot, so that the SIM interface will be re-enabled by the module to use the second SIM when a high logic level is re-applied on the GPIO5 pin. In the  application  circuit  example  represented in Figure 47,  the  application processor will drive  the SIM switch using its own GPIO to properly select the SIM that is used by the module. Another GPIO may be used to handle the  SIM  hot  insertion  /  removal  function  of  TOBY-L2  modules,  which  can  also  be  handled  by  other  external circuits or by the cellular module GPIO according to the application requirements. The  dual  SIM  connection  circuit  described  in  Figure  47  can  be  implemented  for  SIM  chips  as  well,  providing proper connection between SIM switch and SIM chip as described in Figure 45. If it is required to switch between more than  2 SIM, a circuit similar to the one described in  Figure 47 can be implemented: in case of 4 SIM circuit, using proper 4-throw switch instead of the suggested 2-throw switches.  Follow these guidelines to connect the module to two external SIM connectors:  Use a proper low on resistance (i.e. few ohms) and low on capacitance (i.e. few pF) 2-throw analog switch (e.g. Fairchild FSA2567) as SIM switch to ensure high-speed data transfer according to SIM requirements.  Connect the contacts C1 (VCC) and C6 (VPP) of the two UICC / SIM to the  VSIM / UIM_PWR pin of the module by means of a proper 2-throw analog switch (e.g. Fairchild FSA2567).  Connect  the  contact  C7  (I/O)  of  the  two  UICC  /  SIM  to  the  SIM_IO /  UIM_DATA  pin  of  the  module  by means of a proper 2-throw analog switch (e.g. Fairchild FSA2567).  Connect  the  contact  C3  (CLK)  of  the  two  UICC  /  SIM  to the  SIM_CLK /  UIM_CLK  pin  of the  module  by means of a proper 2-throw analog switch (e.g. Fairchild FSA2567).  Connect the contact C2 (RST) of the two UICC / SIM to the  SIM_RST / UIM_RESET pin of the module by means of a proper 2-throw analog switch (e.g. Fairchild FSA2567).  Connect the contact C5 (GND) of the two UICC / SIM to ground.  Provide a 100 nF bypass capacitor (e.g. Murata GRM155R71C104K) at the SIM supply (VSIM / UIM_PWR), close to the related pad of the two SIM connectors, to prevent digital noise.   Provide a bypass capacitor of about 22 pF to 47 pF (e.g. Murata GRM1555C1H470J) on each SIM line, very close  to  each  related  pad  of  the  two  SIM  connectors,  to  prevent  RF  coupling  especially  in  case  the  RF antenna is placed closer than 10 - 30 cm from the SIM card holders.  Provide a very low capacitance (i.e. less than 10 pF) ESD protection (e.g. Tyco Electronics PESD0402-140) on each externally accessible SIM line, close to each pad of the two SIM connectors, according to the EMC/ESD requirements of the custom application.  Limit capacitance  and  series  resistance  on each  SIM  signal to match  the  SIM requirements (27.7  ns  is  the maximum allowed rise time on clock line, 1.0 µs is the maximum allowed rise time on data and reset lines).
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 93 of 141 TOBY-L2 seriesC1FIRST             SIM CARDVPP (C6)VCC (C1)IO (C7)CLK (C3)RST (C2)GND (C5)C2 C3 C5J1C4 D1 D2 D3 D4GNDU159VSIM VSIM 1VSIM2VSIMVCCC114PDT Analog Switch3V857SIM_IO DAT 1DAT2DAT56SIM_CLK CLK 1CLK2CLK58SIM_RST RST 1RST2RSTSELSECOND   SIM CARDVPP (C6)VCC (C1)IO (C7)CLK (C3)RST (C2)GND (C5)J2C6 C7 C8 C10C9 D5 D6 D7 D8Application ProcessorGPIOR1MPCI-L2 seriesC1FIRST             SIM CARDVPP (C6)VCC (C1)IO (C7)CLK (C3)RST (C2)GND (C5)C2 C3 C5J1C4 D1 D2 D3 D4GNDU18UIM_PWR VSIM 1VSIM2VSIMVCCC114PDT Analog Switch3V810UIM_DATA DAT 1DAT2DAT12UIM_CLK CLK 1CLK2CLK14UIM_RESET RST 1RST2RSTSELSECOND   SIM CARDVPP (C6)VCC (C1)IO (C7)CLK (C3)RST (C2)GND (C5)J2C6 C7 C8 C10C9 D5 D6 D7 D8Application ProcessorGPIOR1 Figure 47: Application circuit for the connection to two removable SIM cards, with SIM detection not implemented Reference Description Part Number – Manufacturer C1 – C4, C6 – C9 33 pF Capacitor Ceramic C0G 0402 5% 25 V GRM1555C1H330JZ01 – Murata C5, C10, C11 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C104KA01 – Murata D1 – D8 Very Low Capacitance ESD Protection PESD0402-140 - Tyco Electronics  R1 47 kΩ Resistor 0402 5% 0.1 W RC0402JR-0747KL- Yageo Phycomp J1, J2 SIM Card Holder, 6 + 2 p., with card presence switch CCM03-3013LFT R102 - C&K Components U1 4PDT Analog Switch,  with Low On-Capacitance and Low On-Resistance FSA2567 - Fairchild Semiconductor Table 31: Example of components for the connection to two removable SIM cards, with SIM detection not implemented
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 94 of 141 2.5.2 Guidelines for SIM layout design The  layout  of  the  SIM  card  interface  lines  (VSIM,  SIM_CLK,  SIM_IO,  SIM_RST  or  UIM_PWR,  UIM_DATA, UIM_CLK, UIM_RESET) may be critical if the SIM card is placed far away from the TOBY-L2 and MPCI-L2 series modules  or  in  close  proximity  to  the  RF  antenna:  these  two  cases  should  be  avoided  or  at  least  mitigated  as described below.  In the first case, the long connection can cause the radiation of some harmonics of the digital data frequency as any  other  digital  interface.  It  is  recommended  to  keep  the  traces  short  and  avoid  coupling  with  RF  line  or sensitive analog inputs. In  the  second  case,  the  same  harmonics  can  be  picked  up  and  create  self-interference  that  can  reduce  the sensitivity of LTE/3G/2G receiver channels whose carrier frequency is coincidental with harmonic frequencies. It is strongly recommended to place the RF bypass capacitors suggested in Figure 44 near the SIM connector. In addition, since the SIM card is typically accessed by the end user, it can be subjected to ESD discharges. Add adequate ESD protection as suggested to protect module SIM pins near the SIM connector. Limit  capacitance  and  series  resistance  on  each  SIM  signal  to  match  the  SIM  specifications.  The  connections should always be kept as short as possible. Avoid coupling with any sensitive analog circuit, since the SIM signals can cause the radiation of some harmonics of the digital data frequency.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 95 of 141 2.6 Data communication interfaces 2.6.1 Universal Serial Bus (USB) 2.6.1.1 Guidelines for USB circuit design The USB_D+ and USB_D- lines carry the USB serial data and signaling. The lines are used in single ended mode for full speed signaling handshake, as well as in differential mode for high speed signaling and data transfer. USB pull-up or pull-down resistors and external series resistors on USB_D+ and USB_D- lines as required by the USB 2.0 specification [6] are part of the module USB pin driver and do not need to be externally provided. The additional VUSB_DET input pin can be optionally connected the USB VBUS supply (5.0 V typical) provided by the host, to allow the complete bus detach functionality for further reduction of the current consumption: the module disables the USB interface after a high-to-low logic level transition on the VUSB_DET input pin. Routing the USB pins to a connector, they will be externally accessible on the application device. According to EMC/ESD requirements of the application, an additional ESD protection device with very low capacitance should be provided close to accessible point on the line connected to this pin, as described in Figure 48 and Table 32.   The  USB  interface  pins  ESD  sensitivity  rating  is  1  kV  (Human  Body  Model  according  to  JESD22-A114F). Higher protection level could be required if  the lines are  externally accessible  and  it can be achieved by mounting  a  very  low  capacitance  (i.e.  less  or  equal  to  1  pF)  ESD  protection  (e.g.  Tyco  Electronics PESD0402-140 ESD protection device) on the lines connected to these pins, close to accessible points.  The USB_D+ and USB_D- pins of the modules can be directly connected to the USB host application processor without additional ESD protections if they are not externally accessible or according to EMC/ESD requirements.  D+D-GND28 USB_D+27 USB_D-GNDUSB DEVICE CONNECTORVBUSD+D-GND28 USB_D+27 USB_D-GNDUSB HOST PROCESSORD+D-GND38 USB_D+36 USB_D-GNDUSB DEVICE CONNECTORVBUSTOBY-L2 series  TOBY-L2 series MPCI-L2 series  MPCI-L2 series D+D-GND38 USB_D+36 USB_D-GNDUSB HOST PROCESSORVBUS 4VUSB_DET4VUSB_DETD1 D2 C1D3D1 D2C1 Figure 48: USB Interface application circuits Reference Description Part Number - Manufacturer C1 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R61A104KA01 - Murata D1, D2, D3 Very Low Capacitance ESD Protection PESD0402-140 - Tyco Electronics  Table 32: Component for USB application circuits
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 96 of 141 2.6.1.2 Guidelines for USB layout design The USB_D+ / USB_D- lines require accurate layout design to achieve reliable signaling at the high speed data rate (up to 480 Mb/s) supported by the USB serial interface.  The characteristic impedance of the USB_D+ / USB_D- lines is specified by the Universal Serial Bus Revision 2.0 specification  [6].  The  most  important  parameter  is  the  differential  characteristic  impedance  applicable  for  the odd-mode electromagnetic field, which should be as close as possible to 90   differential. Signal integrity may be degraded if PCB layout is not optimal, especially when the USB signaling lines are very long. Use the following general routing guidelines to minimize signal quality problems:  Route USB_D+ / USB_D- lines as a differential pair  Route USB_D+ / USB_D- lines as short as possible  Ensure the differential characteristic impedance (Z0) is as close as possible to 90   Ensure the common mode characteristic impedance (ZCM) is as close as possible to 30   Consider design rules for USB_D+ / USB_D- similar to RF transmission lines, being them coupled differential micro-strip or buried stripline: avoid any stubs, abrupt change of layout, and route on clear PCB area  Figure  49  and  Figure  50  provide  two  examples  of  coplanar  waveguide  designs  with  differential  characteristic impedance close to 90  and common mode characteristic impedance close to 30 . The first transmission line can  be  implemented  in  case  of  4-layer  PCB  stack-up  herein  described,  the  second  transmission  line  can  be implemented in case of 2-layer PCB stack-up herein described.  35 µm35 µm35 µm35 µm270 µm270 µm760 µmL1 CopperL3 CopperL2 CopperL4 CopperFR-4 dielectricFR-4 dielectricFR-4 dielectric350 µm 400 µm400 µm350 µm400 µm Figure 49: Example of USB line design, with Z0 close to 90  and ZCM close to 30 , for the described 4-layer board layup 35 µm35 µm1510 µmL2 CopperL1 CopperFR-4 dielectric740 µm 410 µm410 µm740 µm410 µm Figure 50: Example of USB line design, with Z0 close to 90  and ZCM close to 30 , for the described 2-layer board layup
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 97 of 141 2.6.2 Asynchronous serial interface (UART)  The UART interface is not available on MPCI-L2 series modules.  2.6.2.1 Guidelines for UART circuit design  The UART is not supported by TOBY-L2x0-00S: the pins should be not driven by any external device.  Providing the full RS-232 functionality (using the complete V.24 link) If RS-232 compatible signal levels are needed, two different external voltage translators  can be used to provide full RS-232 (9 lines) functionality: e.g. using the Texas Instruments SN74AVC8T245PW for the translation from 1.8 V to 3.3 V, and the Maxim MAX3237E for the translation from 3.3 V to RS-232 compatible signal level. If a 1.8 V host processor is used, for complete RS-232 functionality, the complete UART interface of the module (DCE) must be connected to a 1.8 V application processor (DTE) as described in Figure 51. TxDApplication Processor(1.8V DTE)RxDRTSCTSDTRDSRRIDCDGNDTOBY-L2 series (1.8V DCE)16 TXD13 DTR17 RXD14 RTS15 CTS10 DSR11 RI12 DCDGND0ΩTP0ΩTP0ΩTP0ΩTP0ΩTP0ΩTP0ΩTP0ΩTP Figure 51: UART interface application circuit with complete V.24 link in DTE/DCE serial communication (1.8V DTE) If a 3.0 V Application Processor is used, appropriate unidirectional voltage translators must be provided using the module V_INT output as 1.8 V supply, as described in Figure 52. 5V_INTTxDApplication Processor(3.0V DTE)RxDRTSCTSDTRDSRRIDCDGNDTOBY-L2 series (1.8V DCE)16 TXD13 DTR17 RXD14 RTS15 CTS10 DSR11 RI12 DCDGND1V8B1 A1GNDU1B3A3VCCBVCCAUnidirectionalVoltage TranslatorC1 C23V0DIR3DIR2 OEDIR1VCCB2 A2B4A4DIR41V8B1 A1GNDU2B3A3VCCBVCCAUnidirectionalVoltage TranslatorC3 C43V0DIR1DIR3 OEB2 A2B4A4DIR4DIR2TP0ΩTP0ΩTP0ΩTP0ΩTP0ΩTP0ΩTP0ΩTP0ΩTP Figure 52: UART interface application circuit with complete V.24 link in DTE/DCE serial communication (3.0 V DTE) Reference Description Part Number - Manufacturer C1, C2, C3, C4 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R61A104KA01 - Murata U1, U2 Unidirectional Voltage Translator SN74AVC4T774 - Texas Instruments Table 33: Component for UART application circuit with complete V.24 link in DTE/DCE serial communication (3.0 V DTE)
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 98 of 141 Providing the TXD, RXD, RTS and CTS lines only (not using the complete V.24 link) If the functionality of the DSR, DCD, RI and DTR lines is not required in, or the lines are not available:  Connect the module DTR input line to GND using a 0  series resistor, since the module requires DTR active  Leave DSR, DCD and RI lines of the module unconnected and floating If RS-232 compatible signal levels are needed, the Maxim 13234E voltage level translator can be used. This chip translates voltage levels from 1.8 V (module side) to the RS-232 standard. If a 1.8 V Application Processor is used, the circuit should be implemented as described in Figure 53.  TxDApplication Processor(1.8V DTE)RxDRTSCTSDTRDSRRIDCDGNDTOBY-L2 series (1.8V DCE)16 TXD13 DTR17 RXD14 RTS15 CTS10 DSR11 RI12 DCDGND0ΩTP0ΩTP0ΩTP0ΩTP0ΩTPTPTPTP Figure 53: UART interface application circuit with partial V.24 link (5-wire) in the DTE/DCE serial communication (1.8V DTE) If a 3.0 V Application Processor is used, appropriate unidirectional voltage translators must be provided using the module V_INT output as 1.8 V supply, as described in Figure 54.  5V_INTTxDApplication Processor(3.0V DTE)RxDRTSCTSDTRDSRRIDCDGNDTOBY-L2 series (1.8V DCE)16 TXD13 DTR17 RXD14 RTS15 CTS10 DSR11 RI12 DCDGND1V8B1 A1GNDU1B3A3VCCBVCCAUnidirectionalVoltage TranslatorC1 C23V0DIR3DIR2 OEDIR1VCCB2 A2B4A4DIR4TP0ΩTP0ΩTP0ΩTP0ΩTP0ΩTPTPTPTP Figure 54: UART interface application circuit with partial V.24 link (5-wire) in DTE/DCE serial communication (3.0 V DTE) Reference Description Part Number - Manufacturer C1, C2 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R61A104KA01 - Murata U1 Unidirectional Voltage Translator SN74AVC4T774 - Texas Instruments Table 34: Component for UART application circuit with partial V.24 link (5-wire) in DTE/DCE serial communication (3.0 V DTE)
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 99 of 141 Providing the TXD and RXD lines only (not using the complete V24 link) If the functionality of the CTS, RTS, DSR, DCD, RI and DTR lines is not required in the application, or the lines are not available, the circuit with a 1.8 V Application Processor should be implemented as described in Figure 55:  Connect  the  module  RTS  input  line  to  GND  or  to  the  CTS  output  line  of  the  module:  since  the  module requires RTS active (low electrical level) if HW flow-control is enabled (AT&K3, that is the default setting), the pin can be connected using a 0  series resistor to GND or to the active-module CTS (low electrical level) when the module is in active-mode, the UART interface is enabled and the HW flow-control is enabled  Connect the module DTR input line to GND using a 0  series resistor, as the module requires DTR active  Leave DSR, DCD and RI lines of the module unconnected and floating  TxDApplication Processor(1.8V DTE)RxDRTSCTSDTRDSRRIDCDGNDTOBY-L2 series (1.8V DCE)16 TXD13 DTR17 RXD14 RTS15 CTS10 DSR11 RI12 DCDGND0ΩTP0ΩTP0ΩTPTP0ΩTPTPTPTP Figure 55: UART interface application circuit with partial V.24 link (3-wire) in the DTE/DCE serial communication (1.8V DTE) If a 3.0 V Application Processor is used, appropriate unidirectional voltage translators must be provided using the module V_INT output as 1.8 V supply, as described in Figure 56.  5V_INTTxDApplication Processor(3.0V DTE)RxDDTRDSRRIDCDGNDTOBY-L2 series (1.8V DCE)16 TXD13 DTR17 RXD10 DSR11 RI12 DCDGND1V8B1 A1GNDU1VCCBVCCAUnidirectionalVoltage TranslatorC1 C23V0DIR1DIR2 OEVCCB2 A2RTSCTS14 RTS15 CTSTP0ΩTP0ΩTP0ΩTPTP0ΩTPTPTPTP Figure 56: UART interface application circuit with partial V.24 link (3-wire) in DTE/DCE serial communication (3.0 V DTE) Reference Description Part Number - Manufacturer C1, C2 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R61A104KA01 - Murata U1 Unidirectional Voltage Translator SN74AVC2T245 - Texas Instruments Table 35: Component for UART application circuit with partial V.24 link (3-wire) in DTE/DCE serial communication (3.0 V DTE)
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 100 of 141 Additional considerations   Do not apply voltage to any UART interface pin before the switch-on of the UART supply source (V_INT), to avoid latch-up of circuits and allow a proper boot of the module. If the external signals connected to the  cellular  module  cannot  be  tri-stated  or  set  low,  insert  a  multi  channel  digital  switch  (e.g.  TI SN74CB3Q16244,  TS5A3159,  or  TS5A63157)  between  the  two-circuit  connections  and  set  to  high impedance before V_INT switch-on.  ESD  sensitivity  rating  of  UART  interface  pins  is  1  kV  (Human  Body  Model  according  to  JESD22-A114). Higher protection level could be required if  the lines are  externally accessible  and  it can be achieved by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) close to accessible points.  If the UART interface pins are not used, they can be left unconnected on the application board, but  it is recommended providing accessible test points directly connected to all the UART pins (TXD, RXD,  RTS, CTS, DTR, DSR, DCD, RI) for diagnostic purpose, in particular providing a 0  series jumper on each line to detach each UART pin of the module from the DTE application processor.  2.6.2.2 Guidelines for UART layout design The UART serial interface requires the same consideration regarding electro-magnetic interference as any other digital  interface.  Keep  the  traces  short  and  avoid  coupling  with  RF  line  or  sensitive  analog  inputs,  since  the signals can cause the radiation of some harmonics of the digital data frequency.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 101 of 141 2.6.3 DDC (I2C) interface  The I2C bus compatible Display Data Channel interface is not available on MPCI-L2 series modules.  2.6.3.1 Guidelines for DDC (I2C) circuit design  I2C bus function is not supported by TOBY-L2x0-00S: the pins should be not driven by any external device.  General considerations The DDC  I2C-bus master interface can be used to communicate with u-blox GNSS receivers and other external I2C-bus slaves as an audio codec. Beside the general considerations reported below, see:  the following parts of this section for specific guidelines for the connection to u-blox GNSS receivers  the section 2.7.1 for an application circuit example with an external audio codec I2C-bus slave To be compliant with the I2C bus specifications, the module bus interface pads are open drain output and pull up resistors must be mounted externally. Resistor values must conform to  I2C bus specifications [12]: for example, 4.7 k resistors can be commonly used. Pull-ups must be connected to a supply voltage of 1.8 V (typical), since this is the voltage domain of the DDC pins which are not tolerant to higher voltage values (e.g. 3.0 V).   Connect the DDC (I2C) pull-ups to the V_INT 1.8 V supply source, or another 1.8 V supply source enabled after V_INT (e.g., as the GNSS 1.8 V supply present in Figure 57 application circuit), as any external signal connected to the DDC (I2C) interface must not be set high before the switch-on of the V_INT supply of DDC pins, to avoid latch-up of circuits and let a proper boot of the module.  The signal shape is defined by the values of the pull-up resistors and the bus capacitance. Long wires on the bus will increase  the  capacitance.  If  the  bus  capacitance  is  increased,  use  pull-up  resistors  with  nominal  resistance value lower than 4.7 k, to match the I2C bus specifications [12] regarding rise and fall times of the signals.   Capacitance and series resistance must be limited on the bus to match the I2C specifications (1.0 µs is the maximum allowed rise time on the SCL and SDA lines): route connections as short as possible.  If the pins are not used as DDC bus interface, they can be left unconnected.  ESD  sensitivity  rating  of  the  DDC  (I2C)  pins  is  1  kV  (Human  Body  Model  according  to  JESD22-A114). Higher protection level could be required if  the lines are  externally accessible  and  it can be achieved by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) close to accessible points.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 102 of 141 Connection with u-blox 1.8 V GNSS receivers Figure 57 shows an application circuit for connecting TOBY-L2 cellular modules to a u-blox 1.8 V GNSS receiver.  SDA / SCL pins of the TOBY-L2 cellular module are directly connected to the relative I2C pins of the u-blox 1.8 V GNSS receiver, with appropriate pull-up resistors connected to the 1.8 V GNSS supply enabled after the V_INT supply of the I2C pins of the TOBY-L2 cellular module.  GPIO3  and  GPIO4  pins  are  directly  connected  respectively  to  the  TxD1  and  EXTINT0  pins  of  the  u-blox 1.8 V GNSS receiver to provide “GNSS data ready” and “GNSS RTC sharing” functions.  A pull-down resistor is mounted on GPIO2 line to avoid an improper switch on of the u-blox GNSS receiver.  The V_BCKP output of the cellular module is connected to the V_BCKP input pin of the GNSS receiver to provide the supply for the GNSS RTC and backup RAM when the VCC supply of the cellular module is within its  operating  range  and  the  VCC  supply  of  the  GNSS  receiver  is  disabled.  This  enables  the  u-blox  GNSS receiver  to  recover  from  a  power  breakdown  with  either  a  hot  start  or  a  warm  start  (depending  on  the duration of the GNSS VCC outage) and to maintain the configuration settings saved in the backup RAM.  TOBY-L2 series  (except TOBY-L2x0-00S)R1INOUTGNDGNSS LDORegulatorSHDNu-blox GNSS1.8 V receiverSDA2SCL2R21V8 1V8VMAIN1V8U122 GPIO2SDASCLC1TxD1EXTINT0GPIO3GPIO455542425VCCR3V_BCKP V_BCKP3GNSS data readyGNSS RTC sharingGNSS supply enabled Figure 57: Application circuit for connecting TOBY-L2 modules to u-blox 1.8 V GNSS receivers Reference Description Part Number - Manufacturer R1, R2 4.7 kΩ Resistor 0402 5% 0.1 W  RC0402JR-074K7L - Yageo Phycomp R3 47 kΩ Resistor 0402 5% 0.1 W  RC0402JR-0747KL - Yageo Phycomp U1 Voltage Regulator for GNSS receiver See GNSS receiver Hardware Integration Manual Table 36: Components for connecting TOBY-L2 modules to u-blox 1.8 V GNSS receivers  Figure 58 illustrates an alternative application circuit solution in which the TOBY-L2 supplies a u-blox 1.8 V GNSS receiver.  The  V_INT  1.8  V  regulated  supply  output  of  a  TOBY-L2  module  can  be  used  as  supply  source  for  a u-blox  1.8  V  GNSS  receiver  (u-blox  6  generation  receiver  or  newer)  instead  of  using  an  external  voltage regulator,  as  shown  in  Figure  57.  The  V_INT  supply is  able  to  support  the  maximum  current  consumption  of these positioning receivers. The internal switching step-down regulator that generates the  V_INT supply is set to 1.8 V (typical) when the cellular module is switched on and it is disabled when the module is switched off. The supply of the u-blox 1.8 V GNSS receiver can be switched off using an external p-channel MOS controlled by the  GPIO2  pin of  TOBY-L2  cellular  modules  by  means  of a  proper  inverting transistor as  shown  in  Figure  58, implementing the “GNSS supply enable” function. If this feature is not required, the V_INT supply output can be directly connected to the u-blox 1.8 V GNSS receiver, so that it will switch on when V_INT output is enabled.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 103 of 141 According to the V_INT supply output voltage ripple characteristic specified in the TOBY-L2 Data Sheet [1]:  Additional filtering may be needed to properly supply an external LNA, depending on the characteristics of the used LNA, adding a series ferrite bead and a bypass capacitor (e.g. the Murata BLM15HD182SN1 ferrite bead and the Murata GRM1555C1H220J 22 pF capacitor) at the input of the external LNA supply line  u-blox GNSS1.8 V receiverTxD1EXTINT0V_BCKP V_BCKP3SDA2SCL2VCC1V8C1R35V_INTR5R4TPT2T1R1 R21V8 1V8GNSS data readyGNSS RTC sharingGNSS supply enabledTOBY-L2 series  (except TOBY-L2x0-00S)22 GPIO2SDASCLGPIO3GPIO455542425 Figure 58: Application circuit for connecting TOBY-L2 modules to u-blox 1.8 V GNSS receivers using V_INT as supply Reference Description Part Number - Manufacturer R1, R2 4.7 k Resistor 0402 5% 0.1 W  RC0402JR-074K7L - Yageo Phycomp R3 47 k Resistor 0402 5% 0.1 W  RC0402JR-0747KL - Yageo Phycomp R4 10 k Resistor 0402 5% 0.1 W  RC0402JR-0710KL - Yageo Phycomp R5 100 k Resistor 0402 5% 0.1 W  RC0402JR-07100KL - Yageo Phycomp T1 P-Channel MOSFET Low On-Resistance IRLML6401 - International Rectifier or NTZS3151P - ON Semi T2 NPN BJT Transistor BC847 - Infineon C1 100 nF Capacitor Ceramic X7R 0402 10% 16 V GRM155R71C104KA01 - Murata Table 37: Components for connecting TOBY-L2 modules to u-blox 1.8 V GNSS receivers using V_INT as supply  For additional  guidelines regarding  the  design of applications with  u-blox  1.8  V  GNSS  receivers  see  the  GNSS Implementation Application Note [13] and the Hardware Integration Manual of the u-blox GNSS receivers.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 104 of 141 Connection with u-blox 3.0 V GNSS receivers Figure 59 shows an application circuit for connecting TOBY-L2 cellular modules to a u-blox 3.0 V GNSS receiver:  As the SDA and SCL pins of the TOBY-L2 cellular module are not tolerant up to 3.0 V, the connection to the related  I2C  pins  of  the  u-blox  3.0  V  GNSS  receiver  must  be  provided  using  a  proper  I2C-bus  Bidirectional Voltage Translator with proper pull-up resistors (e.g. the TI TCA9406 additionally provides the partial power down feature so that the GNSS 3.0 V supply can be ramped up before the V_INT 1.8 V cellular supply).  As the GPIO3 and GPIO4 pins of the TOBY-L2 cellular module are not tolerant up to 3.0 V, the connection to the related pins of the u-blox 3.0 V GNSS receiver must be provided using a proper Unidirectional General Purpose  Voltage  Translator  (e.g.  TI  SN74AVC2T245,  which  additionally  provides  the  partial  power  down feature so that the 3.0 V GNSS supply can be also ramped up before the V_INT 1.8 V cellular supply).  A pull-down resistor is mounted on GPIO2 line to avoid an improper switch on of the u-blox GNSS receiver.  The V_BCKP supply output of the cellular module can be directly connected to the V_BCKP backup supply input pin of the GNSS receiver as in the application circuit for a u-blox 1.8 V GNSS receiver.  TOBY-L2 series  (except TOBY-L2x0-00S)u-blox GNSS 3.0 V receiver24 GPIO325 GPIO41V8B1 A1GNDU3B2A2VCCBVCCAUnidirectionalVoltage TranslatorC4 C53V0TxD1EXTINT0R1INOUTGNDGNSS LDORegulatorSHDNR2VMAIN3V0U122 GPIO255 SDA54 SCLR4 R51V8SDA_A SDA_BGNDU2SCL_ASCL_BVCCAVCCBI2C-bus Bidirectional Voltage Translator2V_INTC1C2 C3R3SDA2SCL2VCCDIR1DIR23V_BCKPV_BCKPOEOEGNSS data readyGNSS RTC sharingGNSS supply enabled Figure 59: Application circuit for connecting TOBY-L2 modules to u-blox 3.0 V GNSS receivers Reference Description Part Number - Manufacturer R1, R2, R4, R5 4.7 kΩ Resistor 0402 5% 0.1 W  RC0402JR-074K7L - Yageo Phycomp R3 47 kΩ Resistor 0402 5% 0.1 W  RC0402JR-0747KL - Yageo Phycomp C2, C3, C4, C5 100 nF Capacitor Ceramic X5R 0402 10% 10V GRM155R71C104KA01 - Murata U1, C1 Voltage Regulator for GNSS receiver and capacitor related output bypass  See GNSS receiver Hardware Integration Manual U2 I2C-bus Bidirectional Voltage Translator TCA9406DCUR - Texas Instruments U3 Generic Unidirectional Voltage Translator SN74AVC2T245 - Texas Instruments Table 38: Components for connecting TOBY-L2 modules to u-blox 3.0 V GNSS receivers For additional  guidelines regarding  the  design of applications with  u-blox  3.0  V  GNSS  receivers  see  the  GNSS Implementation Application Note [13] and the Hardware Integration Manual of the u-blox GNSS receivers.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 105 of 141 2.6.3.2 Guidelines for DDC (I2C) layout design The  DDC  (I2C)  serial  interface  requires  the  same  consideration  regarding  electro-magnetic  interference  as  any other digital interface. Keep the traces short and avoid coupling with RF line or sensitive analog inputs, since the signals can cause the radiation of some harmonics of the digital data frequency.   2.6.4 Secure Digital Input Output interface (SDIO)  The SDIO Secure Digital Input Output interface is not available on MPCI-L2 series modules.  2.6.4.1 Guidelines for SDIO circuit design  The  functionality  of  the  SDIO_D0,  SDIO_D1,  SDIO_D2,  SDIO_D3,  SDIO_CLK,  SDIO_CMD  pins  is  not supported by TOBY-L2x0-00S: the pins should be not driven improperly by any external device.   TOBY-L2  series modules include  a 4-bit Secure  Digital Input  Output  interface (SDIO_D0, SDIO_D1, SDIO_D2, SDIO_D3, SDIO_CLK, SDIO_CMD) available to communicate with an external Wi-Fi chip.   Guidelines for SDIO circuit design will be described in detail in a successive release of the document.   Do  not  apply  voltage  to  any  SDIO  interface  pin  before  the  switch-on  of  SDIO  interface  supply  source (V_INT),  to  avoid  latch-up  of  circuits  and  allow  a  proper  boot  of  the  module.  If  the  external  signals connected to the cellular module cannot be tri-stated or set low, insert a multi channel digital switch (e.g. TI  SN74CB3Q16244,  TS5A3159,  or  TS5A63157)  between  the  two-circuit  connections  and  set  to  high impedance before V_INT switch-on.  ESD  sensitivity  rating  of  SDIO  interface  pins  is  1  kV  (Human  Body  Model  according  to  JESD22-A114). Higher protection level could be required if  the lines are  externally accessible  and  it can be achieved by mounting  a  very  low  capacitance  ESD  protection  (e.g.  Tyco  Electronics  PESD0402-140  ESD),  close  to accessible points.  If the SDIO interface pins are not used, they can be left unconnected on the application board.  2.6.4.2 Guidelines for SDIO layout design The SDIO serial interface requires the same consideration regarding electro-magnetic interference as any other high speed digital interface. Keep the traces short and avoid coupling with RF  lines / parts  or sensitive analog inputs, since the signals can cause the radiation of some harmonics of the digital data frequency. Consider the usage of low value series damping resistors to avoid reflections and other losses in signal integrity, which may create ringing and loss of a square wave shape. However, the resistor value should not be so high that the rise / fall time requirements are violated: for example, 22  or 33  resistor may be sufficient to slow the signal and remove the ringing problem.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 106 of 141 2.7 Audio interface 2.7.1 Digital audio interface  The I2S interface is not available on MPCI-L2 series modules.  2.7.1.1 Guidelines for digital audio circuit design  The I2S interface is not supported by TOBY-L2x0-00S: the pins should be not driven by any external device.  I2S digital audio interface can be connected to an external digital audio device for voice applications. The external digital  audio  device  must  be  properly  configured  according  to  the  cellular  module  configuration,  with  the opposite role, the same mode, the same sample rate and voltage level.  Any external digital audio device compliant with the configuration of the  digital audio interface of the TOBY-L2 cellular module can be used. Examples of compatible audio codec parts, suitable to provide analog audio voice capability on the application device, are the following:  Marvell 88PM805  Maxim MAX9860  Maxim MAX9867  Maxim MAX9880A  An  appropriate  specific  application  circuit  has  to  be  implemented  and  configured  according  to  the  particular external digital audio device or audio codec used and according to the application requirements.  Figure 60 and Table 39 describe an application circuit for the I2S digital audio interface providing voice capability using an external audio voice codec. DAC and ADC integrated in the external audio codec respectively converts an incoming digital data stream to analog audio output through a mono amplifier and converts the microphone input signal to the digital bit stream over the digital audio interface. The module’s I2S interface (I2S master) is connected to the related pins of the external audio codec (I2S slave). The GPIO6 of the TOBY-L2 series module (that provides a suitable digital output clock) is connected to the clock input of the external audio codec to provide clock reference. The external audio codec is controlled by the wireless module using the DDC (I2C) interface: this interface can be concurrently used to communicate with u-blox GNSS receivers and to control an external audio codec. The V_INT output supplies the external audio codec, defining proper digital interfaces voltage level. Additional  components  are  provided  for  EMC  and  ESD  immunity  conformity:  a  10  nF  bypass  capacitor  and  a series  chip  ferrite  bead  noise/EMI  suppression  filter  provided  on  each  microphone  line  input  and  speaker  line output of the external codec as described in Figure 60 and Table 39. The necessity of these or other additional parts for EMC improvement may depend on the specific application board design.  As various external audio codecs other than the one described  in Figure 60 / Table 39 can be used to provide voice capability, the appropriate specific application circuit has to be implemented and configured according to the particular external digital audio device or audio codec used and according to the application requirements.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 107 of 141 R2R1BCLKGNDU1LRCLKTOBY-L2 series (except TOBY-L2x0-00S)Audio   CodecSDINSDOUT55SDA54SCLSDASCL61GPIO6 MCLKGNDIRQnR3 C3C2C15V_INTVDD1V8MICBIASC4 R4C5C6EMI1MICLNMICLPD1Microphone ConnectorEMI2MICC12 C11J1MICGNDR5 C8 C7D2SPKSpeaker ConnectorOUTPOUTNJ2C10 C9C14 C13EMI3EMI452I2S_CLK50I2S_WA51I2S_TXD53I2S_RXD Figure 60: I2S interface application circuit with an external audio codec to provide voice capability Reference Description Part Number – Manufacturer C1 100 nF Capacitor Ceramic X5R 0402 10% 10V GRM155R71C104KA01 – Murata C2, C4, C5, C6 1 µF Capacitor Ceramic X5R 0402 10% 6.3 V GRM155R60J105KE19 – Murata C3 10 µF Capacitor Ceramic X5R 0603 20% 6.3 V GRM188R60J106ME47 – Murata C7, C8, C9, C10 27 pF Capacitor Ceramic COG 0402 5% 25 V  GRM1555C1H270JZ01 – Murata C11, C12, C13, C14 10 nF Capacitor Ceramic X5R 0402 10% 50V GRM155R71C103KA88 – Murata D1, D2 Low Capacitance ESD Protection USB0002RP or USB0002DP – AVX EMI1, EMI2, EMI3, EMI4 Chip Ferrite Bead Noise/EMI Suppression Filter 1800 Ohm at 100 MHz, 2700 Ohm at 1 GHz BLM15HD182SN1 – Murata J1 Microphone Connector Various manufacturers  J2 Speaker Connector Various manufacturers  MIC 2.2 k Electret Microphone Various manufacturers R1, R2  4.7 kΩ Resistor 0402 5% 0.1 W  RC0402JR-074K7L - Yageo Phycomp R3 10 kΩ Resistor 0402 5% 0.1 W  RC0402JR-0710KL - Yageo Phycomp R4, R5 2.2 kΩ Resistor 0402 5% 0.1 W  RC0402JR-072K2L – Yageo Phycomp SPK 32  Speaker Various manufacturers  U1 16-Bit Mono Audio Voice Codec MAX9860ETG+ - Maxim Table 39: Example of components for audio voice codec application circuit  Do not apply voltage to any I2S pin before the switch-on of I2S supply source (V_INT), to avoid latch-up of circuits and allow a proper boot of the module. If the  external signals connected to the cellular module cannot be tri-stated or set low, insert a multi channel digital switch (e.g. TI SN74CB3Q16244, TS5A3159, or TS5A63157) between the two-circuit connections and set to high impedance before V_INT switch-on.  ESD sensitivity rating of I2S interface pins is 1 kV (Human Body Model according to JESD22-A114). Higher protection level could be required if the lines are externally accessible and it can be achieved by mounting a general purpose ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) close to accessible points.  If the I2S digital audio pins are not used, they can be left unconnected on the application board.  2.7.1.2 Guidelines for digital audio layout design I2S  interface  and  clock  output  lines  require  the  same  consideration  regarding  electro-magnetic  interference  as any other high speed digital interface. Keep the traces short and avoid coupling with RF lines / parts or sensitive analog inputs, since the signals can cause the radiation of some harmonics of the digital data frequency.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 108 of 141 2.8 General Purpose Input/Output  GPIOs  are  not  supported  by  the  TOBY-L2x0-00S  product  version  except  for  the  Wireless  Wide  Area Network  status  indication  configured  on  the  GPIO1  pin:  the  pins  should  be  not  driven  by  any  external device.  GPIOs are not available on MPCI-L2 series modules. 2.8.1.1 Guidelines for TOBY-L2 series GPIO circuit design A typical usage of TOBY-L2 modules’ GPIOs can be the following:  Network indication provided over GPIO1 pin (see Figure 61 / Table 40 below)  GNSS supply enable provided over GPIO2 (see Figure 57 / Table 36 or Figure 59 / Table 38 in section 2.6.3)  GNSS data ready provided over GPIO3 (see Figure 57 / Table 36 or Figure 59 / Table 38 in section 2.6.3)  GNSS RTC sharing provided over GPIO4 (see Figure 57 / Table 36 or Figure 59 / Table 38 in section 2.6.3)  SIM card detection provided over GPIO5 (see Figure 46 / Table 30 or Figure 47 / Table 31 in section 2.5)  Clock output provided over GPIO6 (see Figure 60 / Table 39 in section 2.7.1)  TOBY-L2 seriesGPIO1R1R33V8Network IndicatorR221DL1T1 Figure 61: Application circuit for network indication provided over GPIO1 Reference Description Part Number - Manufacturer R1 10 k Resistor 0402 5% 0.1 W Various manufacturers R2 47 k Resistor 0402 5% 0.1 W Various manufacturers R3 820  Resistor 0402 5% 0.1 W Various manufacturers DL1 LED Red SMT 0603 LTST-C190KRKT - Lite-on Technology Corporation T1 NPN BJT Transistor BC847 - Infineon Table 40: Components for network indication application circuit  Use transistors with at least an integrated resistor in the base pin or otherwise put a 10 k resistor on the board in series to the GPIO of TOBY-L2 modules.  Do not apply voltage to any GPIO of TOBY-L2 before the switch-on of the GPIOs supply (V_INT), to avoid latch-up  of  circuits  and  allow  a  proper  module  boot.  If  the  external  signals  connected  to  the  module cannot be tri-stated or set low, insert a multi channel digital switch (e.g. TI SN74CB3Q16244, TS5A3159, TS5A63157) between the two-circuit connections and set to high impedance before V_INT switch-on.  ESD  sensitivity  rating  of  the  GPIO  pins  is  1  kV  (Human  Body  Model  according  to  JESD22-A114).  Higher protection level could be required if  the lines are  externally accessible  and it can  be achieved by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor array) close to accessible points.  If the GPIO pins are not used, they can be left unconnected on the application board.  2.8.1.2 Guidelines for general purpose input/output layout design The general purpose inputs / outputs pins are generally not critical for layout.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 109 of 141 2.9 Mini PCIe specific signals (W_DISABLE#, LED_WWAN#)  Mini PCI Express specific signals (W_DISABLE#, LED_WWAN#) are not available on TOBY-L2 series.  2.9.1.1 Guidelines for W_DISABLE# circuit design As described in Figure 62, the MPCI-L2 series modules W_DISABLE# wireless disable input is equipped with an internal pull-up to the 3.3Vaux supply: an external pull-up resistor is not required and should not be provided. If connecting the W_DISABLE# input to a push button, the pin will be externally accessible on the application device. According to EMC/ESD requirements of the application, an additional ESD  protection device should be provided close to accessible point, as described in Figure 62 and Table 41.   ESD sensitivity rating of the W_DISABLE# pin is 1 kV (HBM according to JESD22-A114). Higher protection level can be required if the line is externally accessible on the application board, e.g. if an accessible push button  is  directly  connected  to  the  W_DISABLE#  pin,  and  it  can  be  achieved  by  mounting  an  ESD protection (e.g. EPCOS CA05P4S14THSG varistor) close to accessible point.  An open drain output is suitable to drive the W_DISABLE# input from an application processor as it is equipped with an internal pull-up to the 3.3Vaux supply as described in Figure 62. A compatible push-pull output of an application processor can also be used. In any  case,  take care to  set the proper level in all the possible scenarios to avoid an inappropriate disabling of the radio operations.  MPCI-L2 series3.3Vaux20 W_DISABLE#Power-on push buttonESDOpen Drain OutputApplication ProcessorMPCI-L2 series3.3Vaux20 W_DISABLE#TP TP22 k22 k Figure 62: W_DISABLE# application circuit using a push button and an open drain output of an application processor Reference Description Remarks ESD Varistor for ESD protection CT0402S14AHSG - EPCOS Table 41: Example of ESD protection component for the W_DISABLE# application circuit   If the W_DISABLE# functionality is not required by the application, the pin can be left unconnected.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 110 of 141 2.9.1.2 Guidelines for LED_WWAN# circuit design As described in Figure 63 and Table 42, the MPCI-L2 series modules LED_WWAN# active-low open drain output can be directly connected to a system-mounted LED to provide the Wireless Wide Area Network status indication as specified by the PCI Express Mini Card Electromechanical Specification [14].  Open Drain OutputR3V3DL42LED_WWAN#MPCI-L2 series Figure 63: LED_WWAN# application circuit Reference Description Remarks DL LED Green SMT 0603 LTST-C190KGKT - Lite-on Technology Corporation R 470  Resistor 0402 5% 0.1 W Various manufacturers Table 42: Example of components for the LED_WWAN# application circuit  ESD sensitivity rating of the LED_WWAN# pin is 1 kV (Human Body Model according to JESD22-A114).  Higher  protection  level  could  be  required  if  the  line  is  externally  accessible  and  it  can  be  achieved  by mounting an ESD protection (e.g. EPCOS CA05P4S14THSG varistor) close to accessible point.  If the LED_WWAN# functionality is not required by the application, the pin can be left unconnected.  2.9.1.3 Guidelines for W_DISABLE# and LED_WWAN# layout design The W_DISABLE# and LED_WWAN# circuits are generally not critical for layout.   2.10 Reserved pins (RSVD)  Pins reserved for future use, marked as RSVD, are not available on MPCI-L2 series.  TOBY-L2 series modules have pins reserved for future use. All the RSVD pins are to be left unconnected on the application board except the RSVD pin number 6 which must be connected to ground as described in Figure 64.  TOBY-L2 seriesRSVD6RSVD Figure 64: Application circuit for the reserved pins (RSVD)
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 111 of 141 2.11 Module placement An optimized placement allows a minimum RF line’s length and closer path from DC source for VCC / 3.3Vaux. Make  sure  that  the  module,  analog  parts  and  RF  circuits  are  clearly  separated  from  any  possible  source  of radiated energy. In particular, digital circuits can radiate digital frequency harmonics, which can produce Electro-Magnetic  Interference  that  affects  the  module,  analog  parts  and  RF  circuits’  performance.  Implement  proper countermeasures to avoid any possible Electro-Magnetic Compatibility issue. Make sure that the module, RF and analog parts / circuits, and high speed digital circuits are clearly separated from  any  sensitive  part  /  circuit  which  may  be  affected  by  Electro-Magnetic  Interference,  or  employ countermeasures to avoid any possible Electro-Magnetic Compatibility issue. Provide enough clearance between the module and any external part.   The  heat  dissipation  during  continuous  transmission  at  maximum  power  can  significantly  raise  the temperature of the application base-board below the TOBY-L2 and MPCI-L2 series modules: avoid placing temperature sensitive devices close to the module.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 112 of 141 2.12 TOBY-L2 series module footprint and paste mask Figure 65 and Table 43 describe the suggested footprint (i.e. copper mask) layout for TOBY-L2 series modules. The  proposed  land  pattern  layout  slightly  reflects  the  modules’  pads  layout,  with  most  of  the  lateral  pads designed wider on the application board (1.8 x 0.8 mm) than on the module (1.5 x 0.8 mm).  I1AG H J1DF2KM1 M1 M2 P2BGHJOOLNM1 M1 M3I1I1OHJJJEP3F1P1HI1OI2I2F2Module placement outline Figure 65: TOBY-L2 series module suggest footprint (application board top view) Parameter Value  Parameter Value  Parameter Value A 35.6 mm  H 0.80 mm  M2 5.20 mm B 24.8 mm  I1 1.50 mm  M3 4.50 mm D 2.40 mm  I2 1.80 mm  N 2.10 mm E 2.25 mm  J 0.30 mm  O 1.10 mm F1 1.45 mm  K 3.15 mm  P1 1.10 mm F2 1.30 mm  L 7.15 mm  P2 1.25 mm G 1.10 mm  M1 1.80 mm  P3 2.85 mm Table 43: TOBY-L2 series module suggest footprint dimensions The Non Solder Mask Defined (NSMD) pad type is recommended over the Solder Mask Defined (SMD) pad type, implementing the solder mask opening 50 µm larger per side than the corresponding copper pad. The suggested paste mask layout for TOBY-L2 series modules slightly reflects the copper mask layout described in Figure 65 and Table 43, as different stencil apertures layout for any specific pad is recommended:   Blue marked pads: Paste layout reduced circumferentially about 0.025 mm to Copper layout  Green marked pads: Paste layout enlarged circumferentially about 0.025 mm to Copper layout  Purple marked pads: Paste layout one to one to Copper layout The recommended solder paste thickness is 150 µm, according to application production process requirements.   These are recommendations only and not specifications. The exact mask geometries, distances and stencil thicknesses must be adapted to the specific production processes (e.g. soldering etc.) of the customer.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 113 of 141 2.13 MPCI-L2 series module installation MPCI-L2 series modules are fully compliant with the 52-pin PCI Express Full-Mini Card Type F2 form factor, i.e., top-side and bottom-side keep-out areas, 50.95 mm nominal length, 30 mm  nominal width, and all the other dimensions  as  defined  by  the  PCI  Express  Mini  Card  Electromechanical  Specification [14],  except  for  the  card thickness (which nominal value is 3.7 mm), as described in Figure 66.  3.7 mmSide ViewPin 1 Pin 51ANT1ANT2Top ViewHole GND HoleGND 30 mmPin 52 Pin 2Bottom ViewHole GND HoleGND50.95 mm Figure 66: MPCI-L2 series mechanical description (top, side and bottom views)  MPCI-L2  series  modules  are  fully  compliant  with  the  52-pin  PCI  Express  Full-Mini  card  edge  type  system connector as defined by the PCI Express Mini Card Electromechanical Specification [14]. Table 44 describes some examples of 52-pin mating system connectors for the MPCI-L2 series PCI Express Full-Mini card modules.  Manufacturer Part Number Description JAE Electronics MM60 series 52-circuit, 0.8 mm pitch, PCI Express Mini card edge female connector Molex 67910 series 52-circuit, 0.8 mm pitch, PCI Express Mini card edge female connector TE Connectivity / AMP 2041119 series 52-circuit, 0.8 mm pitch, PCI Express Mini card edge female connector FCI 10123824 series 52-circuit, 0.8 mm pitch, PCI Express Mini card edge female connector Table 44: MPCI-L2 series PCI Express Full-Mini card compatible connector   It  is  recommended  to  use  the  two  mounting  holes  described  in  Figure  66  to  fix  (ground)  the  MPCI-L2 module to the main ground of the application board with suitable screws and fasteners.  Follow the recommendations provided by the connector manufacturer and the guidelines available in the PCI Express Mini Card Electromechanical Specification [14] for the development of the footprint (i.e. the copper  mask)  PCB  layout  for  the  mating  edge  system  connector.  The  exact  geometries,  distances  and stencil thicknesses should be adapted to the specific production processes (e.g. soldering etc.).  Follow the recommendations provided by the connector manufacturer to properly insert and remove the MPCI-L2 series modules.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 114 of 141 MPCI-L2 series modules are equipped with two Hirose U.FL-R-SMT RF receptacles for ANT1 / ANT2 ports, which require a suitable mated RF plug from the same connector series as the examples listed in Table 23. To mate the connectors, the mating axes of both connectors must be aligned. The "click" will confirm the fully mated connection. Do not attempt to insert on an extreme angle: insert the RF plug connectors vertically into the ANT1 / ANT2 RF receptacles of the modules, as described in Figure 67. Correct Wrong Figure 67: Precautions during RF connector mating  To unplug the RF cable assembly it is encouraged to use a suitable extraction tool for the RF connector, such as the  Hirose  U.FL-LP-N  or  the  Hirose  U.FL-LP(V)-N  extraction  jig,  according  to  the  RF  cable  assembly  type  used. Hook the end portion of the extraction jig onto the connector cover and pull off vertically in the direction of the connector mating axis, as described in Figure 68.  Extraction JigRF Cable AssemblyU.FL Receptacle Figure 68: Precautions during RF connector extraction  Any attempt to unplug the RF connectors  by pulling on the cable assembly without using a suitable extraction tool may result in damage and affect the RF performance. Do not forcefully twist, deform, or apply any excessive pull force to the RF cables or damage the RF connectors, otherwise the RF performance may be reduced.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 115 of 141 2.14 Thermal guidelines  Modules’ operating temperature range is specified in TOBY-L2 Data Sheet [1] and MPCI-L2 Data Sheet [2].  The  most  critical  condition  concerning  module  thermal  performance  is  the  uplink  transmission  at  maximum power (data upload in connected-mode), when the baseband processor runs at full speed, radio circuits are all active and the RF power amplifier is driven to higher output RF power. This scenario is not often encountered in real networks; however the application should be correctly designed to cope with it. During transmission at maximum RF  power the  TOBY-L2 and MPCI-L2 series modules generate thermal power that can exceed 3 W: this is an indicative value since the exact generated power strictly depends on operating condition such as the number of allocated TX resource blocks, transmitting frequency band, etc. The generated thermal power must be adequately dissipated through the thermal and mechanical design of the application. The  spreading  of  the  Module-to-Ambient  thermal  resistance  (Rth,M-A)  depends  on  the  module  operating condition.  The  overall  temperature  distribution  is  influenced  by  the  configuration  of  the  active  components during the specific mode of operation and their different thermal resistance toward the case interface.   The  Module-to-Ambient  thermal  resistance  value  and  the  relative  increase  of  module  temperature  will differ according to the specific mechanical deployments of the module, e.g. application PCB with different dimensions and characteristics, mechanical shells enclosure, or forced air flow.  The  increase  of  the  thermal  dissipation,  i.e.  the  reduction  of  the  Module-to-Ambient  thermal  resistance,  will decrease  the  temperature  of  the  modules’  internal  circuitry  for  a  given  operating  ambient  temperature.  This improves the device long-term reliability in particular for applications operating at high ambient temperature.  A few hardware techniques may be used to reduce the Module-to-Ambient thermal resistance in the application:  Connect each GND pin with solid ground layer of the application board and connect each ground area of the multilayer application board with complete thermal via stacked down to main ground layer.  Use the two mounting holes described in Figure 66 to fix (ground) the MPCI-L2 modules to the main ground of the application board with suitable screws and fasteners.  Provide a ground plane as wide as possible on the application board.  Optimize antenna return loss, to optimize overall electrical performance of the module including a decrease of module thermal power.  Optimize  the  thermal  design  of  any  high-power  components  included  in  the  application,  such  as  linear regulators and amplifiers, to optimize overall temperature distribution in the application device.  Select  the  material,  the  thickness  and  the  surface  of  the  box  (i.e.  the  mechanical  enclosure)  of  the application device that integrates the module so that it provides good thermal dissipation.  Force ventilation air-flow within mechanical enclosure.  Provide a heat sink  component  attached to  the  module top side, with electrically insulated  / high thermal conductivity adhesive, or on the backside of the application board, below the cellular module.  Follow the thermal guidelines for integrating wireless wide area network mini card add-in cards, such as the MPCI-L2 series modules, as provided in the PCI Express Mini Card Electromechanical Specification [14]  For example, the Module-to-Ambient thermal resistance (Rth,M-A) is strongly reduced with forced air ventilation and a heat-sink installed on the back of the application board, decreasing the module temperature variation. Beside the reduction of the Module-to-Ambient thermal resistance implemented by proper application hardware design, the increase of module temperature can be moderated by proper application software implementation:  Enable module connected-mode for a given time period and then disable it for a time period enough long to properly mitigate temperature increase.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 116 of 141 2.15 ESD guidelines The sections 2.15.1 and 2.15.2 are related to EMC / ESD immunity. The modules are ESD sensitive devices. The ESD sensitivity for  each  pin (as Human Body Model according to JESD22-A114F)  is specified in  TOBY-L2  series Data  Sheet [1]  or  MPCI-L2 series Data  Sheet [2]. Special  precautions are  required  when  handling  the pins;  for ESD handling guidelines see section 3.2.  2.15.1 ESD immunity test overview The  immunity  of  devices  integrating  TOBY-L2  and  MPCI-L2  series  modules  to  Electro-Static  Discharge  (ESD)  is part  of  the  Electro-Magnetic  Compatibility  (EMC)  conformity  which  is  required  for  products  bearing  the  CE marking, compliant  with  the R&TTE  Directive  (99/5/EC),  the EMC  Directive  (89/336/EEC)  and  the  Low  Voltage Directive (73/23/EEC) issued by the Commission of the European Community. Compliance with these directives implies conformity to the following European Norms for device ESD immunity: ESD testing standard CENELEC EN 61000-4-2 [20] and the radio equipment standards ETSI EN 301 489-1 [21], ETSI EN 301 489-7 [22], ETSI EN 301 489-24 [23], which requirements are summarized in Table 45. The ESD immunity test is performed  at the enclosure  port, defined by  ETSI EN  301 489-1  [21]  as  the  physical boundary through which  the electromagnetic field  radiates. If  the  device  implements an integral  antenna,  the enclosure port  is seen as all insulating and conductive surfaces housing the  device. If the  device  implements a removable antenna, the antenna port can be separated from the enclosure port. The antenna port includes the antenna element and its interconnecting cable surfaces. The applicability of ESD immunity test to the whole device depends on the device classification as defined by ETSI EN 301 489-1 [21]. Applicability of ESD immunity test to the relative device ports or the relative interconnecting cables  to  auxiliary  equipment,  depends  on  device  accessible  interfaces  and  manufacturer  requirements,  as defined by ETSI EN 301 489-1 [21]. Contact  discharges  are  performed  at  conductive  surfaces,  while  air  discharges  are  performed  at  insulating surfaces. Indirect contact discharges are performed on the measurement setup horizontal and vertical coupling planes as defined in CENELEC EN 61000-4-2 [20].  For the definition of integral antenna, removable antenna, antenna port and device classification see ETSI EN 301 489-1 [21]. For the contact / air discharges definitions see CENELEC EN 61000-4-2 [20].  Application Category Immunity Level All exposed surfaces of the radio equipment and ancillary equipment in a representative configuration Contact Discharge 4 kV Air Discharge 8 kV Table 45: EMC / ESD immunity requirements as defined by CENELEC EN 61000-4-2 and ETSI EN 301 489-1, 301 489-7, 301 489-24
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04 Advance Information  Design-in     Page 117 of 141 2.15.2 ESD immunity test of TOBY-L2 and MPCI-L2 series reference designs Although  EMC  /  ESD  certification  is  required  for  customized  devices  integrating  TOBY-L2  and  MPCI-L2  series modules for R&TTED and European Conformance CE mark, EMC certification (including ESD immunity) has been successfully performed on TOBY-L2 and MPCI-L2 series modules reference design according to European Norms summarized in Table 45. The  EMC  /  ESD  approved  u-blox  reference  designs consist  of  a  TOBY-L2  and  MPCI-L2  series  module  installed onto  a  motherboard  which  provides  supply  interface,  SIM  card  and  communication  port.  External  LTE/3G/2G antennas are connected to the provided connectors. Since  external  antennas  are  used,  the  antenna  port  can  be  separated  from  the  enclosure  port.  The  reference design  is  not  enclosed  in  a  box  so  that  the  enclosure  port  is  not  identified  with  physical  surfaces.  Therefore, some test cases cannot be applied. Only the antenna port is identified as accessible for direct ESD exposure.   u-blox  TOBY-L2  and  MPCI-L2  series  reference  designs  ESD  immunity  test  results  will  be  described  in  a successive release of the document.  2.15.3 ESD application circuits The  application  circuits  described  in  this  section  are  recommended  and  should  be  implemented  in  the  device integrating TOBY-L2 and MPCI-L2 series modules, according to the application device classification (see ETSI EN 301 489-1 [21]), to satisfy the requirements for ESD immunity test summarized in Table 45.   ESD application circuits will be described in a successive release of the document.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 118 of 141 2.16 Schematic for TOBY-L2 and MPCI-L2 series module integration Figure  69  is  an  example  of  a  schematic  diagram  where  a  TOBY-L2x0-00S  module  is  integrated  into  an application board, using all the available interfaces and functions of the module.  3V8GND330uF 100nF 10nFTOBY-L2x0-00S71 VCC72 VCC70 VCC3V_BCKP23 RESET_NApplication ProcessorOpen Drain Output20 PWR_ONOpen Drain Output68pF47pFSIM Card ConnectorCCVCC (C1)CCVPP (C6)CCIO (C7)CCCLK (C3)CCRST (C2)GND (C5)47pF 47pF 100nF59VSIM57SIM_IO56SIM_CLK58SIM_RST47pF ESD ESD ESD ESD81ANT187ANT2Primary AntennaTPTPSecondary Antenna61GPIO622GPIO224GPIO325GPIO460GPIO55V_INT21GPIO1TP15pF 8.2pF+330uF+75ANT_DETGNDRTC back-up65SDIO_CMD66SDIO_D068SDIO_D163SDIO_D267SDIO_D364SDIO_CLK26 HOST_SELECT062 HOST_SELECT1SDASCL2627RSVDRSVD653I2S_RXD51I2S_TXD52I2S_CLK50I2S_WA3V8WWANIndicatorGND GNDUSB 2.0 HostD-D+27 USB_D-28 USB_D+16 RSVD / TXD17 RSVD / RXD12 RSVD / DCD14 RSVD / RTS15 RSVD / CTS13 RSVD / DTR10 RSVD / DSR11 RSVD / RITPTPTPTPTPTPTPTPVBUS 4VUSB_DET100nF Figure 69: Example of schematic diagram to integrate a TOBY-L2x0-00S module in an application board, using all the interfaces
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 119 of 141 Figure 70 is an example of a schematic diagram where a MPCI-L2 series module is integrated into an application board, using all the available interfaces and functions of the module.  3V3GND330uF 100nF 10nFMPCI-L2 seriesApplication ProcessorOpen Drain Output22 PERST #GND GNDUSB 2.0 HostD-D+27 USB_D-28 USB_D+68pFPrimary AntennaSecondary Antenna42 LED_WWAN#15pF 8.2pF+20 W_DISABLE #Open Drain Output24 3.3Vaux39 3.3Vaux23.3Vaux41 3.3Vaux52 3.3Vaux3V3NC47pFSIM Card ConnectorCCVCC (C1)CCVPP (C6)CCIO (C7)CCCLK (C3)CCRST (C2)GND (C5)47pF47pF100nF8UIM_PWR10 UIM_DATA12 UIM_CLK14 UIM_RESET47pFESDESDESDESD Figure 70: Example of schematic diagram to integrate a MPCI-L2 series module in an application board, using all the interfaces
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 120 of 141 2.17 Design-in checklist This section provides a design-in checklist. 2.17.1 Schematic checklist The following are the most important points for a simple schematic check:  DC supply must provide a nominal voltage at VCC / 3.3Vaux pin within the operating range limits.  DC  supply  must  be  capable  of  supporting  both  the  highest  peak  and  the  highest  averaged  current consumption  values  in  connected-mode,  as  specified  in  the  TOBY-L2  series  Data  Sheet [1]  or  in  the MPCI-L2 series Data Sheet [2].  VCC / 3.3Vaux voltage supply should be clean, with very low ripple/noise: provide the suggested bypass capacitors, in particular if the application device integrates an internal antenna.  Do not apply loads which might exceed the limit for maximum available current from V_INT supply.  Check that voltage level of any connected pin does not exceed the relative operating range.  Check USB_D+ / USB_D- signal lines as well as very low capacitance ESD protections if accessible.  Capacitance and series resistance must be limited on each SIM signal to match the SIM specifications.  Insert the suggested capacitors on each SIM signal and low capacitance ESD protections if accessible.  Check UART signals direction, as the TOBY-L2 signal names follow the ITU-T V.24 Recommendation [7].  Provide accessible  test  points directly connected to the following  pins  of the TOBY-L2  series  modules: V_INT, PWR_ON and RESET_N for diagnostic purpose.  Provide  accessible  test  points  directly  connected  to  all  the  UART  pins  of  the  TOBY-L2  series  modules (TXD, RXD, RTS, CTS, DTR, DSR, DCD, RI) for diagnostic purpose, in particular providing a 0  series jumper on each line to detach each UART pin of the module from the DTE application processor.  Provide proper precautions for EMC / ESD immunity as required on the application board.  Do not apply voltage to any generic digital interface pin of TOBY-L2 series modules before the switch-on of the generic digital interface supply source (V_INT).  All unused pins  can  be left  unconnected except  the  RSVD  pin  number  6  of TOBY-L2 series  modules, which must be connected to GND.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Design-in     Page 121 of 141 2.17.2 Layout checklist The following are the most important points for a simple layout check:  Check 50  nominal characteristic impedance of the RF transmission  line connected to the ANT1 and the ANT2 ports (antenna RF interfaces).  Ensure no coupling occurs between the RF interface and noisy or sensitive signals (primarily USB signals, digital input/output signals, SIM signals, high-speed digital lines such as address and data lines).  Optimize placement for minimum length of RF line.  VCC / 3.3Vaux line should be wide and as short as possible.  Route VCC / 3.3Vaux supply line away from RF lines / parts and other sensitive analog lines / parts.  The VCC / 3.3Vaux bypass capacitors in the picoFarad range should be placed as close as possible to the VCC / 3.3Vaux pins, in particular if the application device integrates an internal antenna.  Ensure proper grounding.  Keep routing short and minimize parasitic capacitance on the SIM lines to preserve signal integrity.  USB_D+ / USB_D- traces should meet the characteristic impedance requirement (90  differential and 30  common mode) and should not be routed close to any RF line / part.  2.17.3 Antenna checklist  Antenna termination should provide 50  characteristic impedance with V.S.W.R at least less than 3:1 (recommended 2:1) on operating bands in deployment geographical area.  Follow the recommendations of the antenna producer for correct antenna installation and deployment (PCB layout and matching circuitry).  Follow the additional guidelines for products marked with the FCC logo (United States only) reported in section 4.2.2.  Ensure high and similar efficiency for both the primary (ANT1) and the secondary (ANT2) antenna.  Ensure high isolation between the primary (ANT1) and the secondary (ANT2) antenna.  Ensure  low  Envelope  Correlation  Coefficient  between  the  primary  (ANT1)  and  the  secondary  (ANT2) antenna: the 3D antenna radiation patterns should have radiation lobes in different directions.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Handling and soldering     Page 122 of 141 3 Handling and soldering   No natural rubbers, no hygroscopic materials or materials containing asbestos are employed.  3.1 Packaging, shipping, storage and moisture preconditioning For information pertaining to TOBY-L2 series reels / tapes, MPCI-L2 series trays, Moisture Sensitivity levels (MSD), shipment and storage information, as well as drying for preconditioning, see the TOBY-L2 series Data Sheet [1], the MPCI-L2 series Data Sheet [2] and the u-blox Package Information Guide [29].  3.2 Handling The TOBY-L2 and MPCI-L2 series modules are Electro-Static Discharge (ESD) sensitive devices.  Ensure ESD precautions are implemented during handling of the module.  Electrostatic  discharge  (ESD)  is the  sudden  and  momentary electric current  that flows  between  two  objects  at different  electrical  potentials  caused  by  direct  contact  or  induced  by  an  electrostatic  field.  The  term  is  usually used in the electronics and other industries to describe momentary unwanted currents that may cause damage to electronic equipment. The ESD sensitivity for each pin of  TOBY-L2 and MPCI-L2 series modules (as Human Body Model according to JESD22-A114F) is specified in the TOBY-L2 series Data Sheet [1] or the MPCI-L2 series Data Sheet [2]. ESD prevention is based on establishing an Electrostatic Protective Area (EPA). The EPA can be a small working station or a large manufacturing area. The main principle of an EPA is that there are no highly charging materials near ESD sensitive electronics, all conductive materials are grounded, workers are grounded, and charge build-up on  ESD  sensitive  electronics  is  prevented.  International  standards  are  used  to  define  typical  EPA  and  can  be obtained  for  example  from  International  Electrotechnical  Commission  (IEC)  or  American  National  Standards Institute (ANSI). In  addition  to  standard  ESD  safety  practices,  the  following  measures  should  be  taken  into  account  whenever handling the TOBY-L2 and MPCI-L2 series modules:  Unless there is a galvanic coupling between the local GND (i.e. the work table) and the PCB GND, then the first point of contact when handling the PCB must always be between the local GND and PCB GND.  Before mounting an antenna patch, connect ground of the device.  When  handling the  module,  do  not  come  into  contact  with  any  charged capacitors  and  be  careful  when contacting materials that can develop charges (e.g. patch antenna, coax cable, soldering iron,…).  To prevent electrostatic discharge through the RF pin, do not touch any exposed antenna area. If there is any risk  that  such  exposed  antenna  area  is  touched  in  non  ESD  protected  work  area,  implement  proper  ESD protection measures in the design.  When soldering the module and patch antennas to the RF pin, make sure to use an ESD safe soldering iron. For more robust designs, employ additional ESD protection measures on the application device integrating the TOBY-L2 and MPCI-L2 series modules, as described in section 2.15.3.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Handling and soldering     Page 123 of 141 3.3 Soldering 3.3.1 Soldering paste "No Clean" soldering paste is strongly recommended for TOBY-L2 series modules, as it does not require cleaning after the soldering process has taken place. The paste listed in the example below meets these criteria. Soldering Paste:    OM338 SAC405 / Nr.143714 (Cookson Electronics) Alloy specification:  95.5% Sn / 3.9% Ag / 0.6% Cu (95.5% Tin / 3.9% Silver / 0.6% Copper)       95.5% Sn / 4.0% Ag / 0.5% Cu (95.5% Tin / 4.0% Silver / 0.5% Copper) Melting Temperature:   217 °C Stencil Thickness:  150 µm for base boards The final choice of the soldering paste depends on the approved manufacturing procedures. The paste-mask geometry for applying soldering paste should meet the recommendations in section 2.12.  The  quality  of  the  solder  joints  on  the  connectors  (’half  vias’)  should  meet  the  appropriate  IPC specification.  3.3.2 Reflow soldering A convection type-soldering oven is strongly recommended for TOBY-L2 series modules over the infrared type  radiation  oven.  Convection  heated  ovens  allow  precise  control  of  the  temperature  and  all  parts  will  be heated up evenly, regardless of material properties, thickness of components and surface color. Consider the  ”IPC-7530 Guidelines for temperature profiling for mass soldering (reflow and wave) processes”, published 2001. Reflow profiles are to be selected according to the following recommendations.  Failure to observe these recommendations can result in severe damage to the device!  Preheat phase Initial heating of component leads and balls. Residual humidity will be dried  out.  Note that this preheat phase will not replace prior baking procedures.  Temperature rise rate: max 3 °C/s  If the temperature rise is too rapid in the preheat phase it may cause excessive slumping.  Time: 60 – 120 s  If  the  preheat  is  insufficient,  rather  large  solder  balls  tend  to  be generated.  Conversely,  if  performed  excessively,  fine  balls  and  large balls will be generated in clusters.  End Temperature: 150 - 200 °C  If  the  temperature  is  too  low,  non-melting  tends  to  be  caused  in areas containing large heat capacity. Heating/ reflow phase The  temperature  rises  above  the  liquidus  temperature  of  217  °C.  Avoid  a  sudden  rise  in  temperature  as  the slump of the paste could become worse.  Limit time above 217 °C liquidus temperature: 40 - 60 s  Peak reflow temperature: 245 °C Cooling phase A  controlled  cooling  avoids  negative  metallurgical  effects  (solder  becomes  more  brittle)  of  the  solder  and possible mechanical tensions in the products. Controlled cooling helps to achieve bright solder fillets with a good shape and low contact angle.  Temperature fall rate: max 4 °C/s
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Handling and soldering     Page 124 of 141   To avoid falling off, modules should be placed on the topside of the motherboard during soldering.  The  soldering  temperature  profile  chosen  at  the  factory  depends  on  additional  external  factors  like  choice  of soldering paste, size, thickness and properties of the base board, etc.   Exceeding  the  maximum  soldering  temperature  and  the  maximum  liquidus  time  limit  in  the recommended soldering profile may permanently damage the module.  Preheat Heating Cooling[°C] Peak Temp. 245°C [°C]250 250Liquidus Temperature217 217200 20040 - 60 sEnd Temp.max 4°C/s150 - 200°C150 150max 3°C/s60 - 120 s100 Typical Leadfree 100Soldering Profile50 50Elapsed time [s] Figure 71: Recommended soldering profile  The modules must not be soldered with a damp heat process.  3.3.3 Optical inspection After soldering the  TOBY-L2 series modules, inspect the modules optically to verify that the module is properly aligned and centered. 3.3.4 Cleaning Cleaning the modules is not recommended. Residues underneath the modules cannot be easily removed with a washing process.  Cleaning with water will lead to capillary effects where water is absorbed in the gap between the baseboard and the module. The combination of residues of soldering flux and encapsulated water leads to short circuits or resistor-like interconnections between neighboring pads. Water will also damage the sticker and the ink-jet printed text.  Cleaning with alcohol or other organic  solvents can result in soldering flux residues  flooding  into the two housings, areas that are not accessible for post-wash inspections. The  solvent will also damage the sticker and the ink-jet printed text.  Ultrasonic cleaning will permanently damage the module, in particular the quartz oscillators. For best results use a "no clean" soldering paste and eliminate the cleaning step after the soldering.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Handling and soldering     Page 125 of 141 3.3.5 Repeated reflow soldering Only a single reflow soldering process is encouraged for boards with a module populated on it. 3.3.6 Wave soldering Boards with combined through-hole technology (THT) components and surface-mount technology (SMT) devices require wave soldering to solder the THT components.  Only a single wave soldering process is encouraged for boards populated with the modules. 3.3.7 Hand soldering Hand soldering is not recommended. 3.3.8 Rework Rework is not recommended.  Never  attempt  a  rework  on  the  module  itself,  e.g.  replacing  individual  components.  Such  actions immediately terminate the warranty. 3.3.9 Conformal coating Certain applications employ a conformal coating of the PCB using HumiSeal® or other related coating products. These materials affect the HF properties of the cellular modules and it is important to prevent them from flowing into the module.  The RF shields do not provide 100% protection for the module from coating liquids with low viscosity, therefore care is required in applying the coating.  Conformal Coating of the module will void the warranty. 3.3.10 Casting If casting is required, use viscose or another type of silicon pottant. The OEM is strongly advised to qualify such processes in combination with the cellular modules before implementing this in the production.  Casting will void the warranty. 3.3.11 Grounding metal covers Attempts to improve grounding by soldering ground cables, wick or other forms of metal strips directly onto the EMI  covers  is  done  at  the  customer's  own  risk.  The  numerous  ground  pins  should  be  sufficient  to  provide optimum immunity to interferences and noise.  u-blox  gives  no  warranty  for  damages  to  the  cellular  modules  caused  by  soldering  metal  cables  or  any other forms of metal strips directly onto the EMI covers. 3.3.12 Use of ultrasonic processes The  cellular  modules  contain  components  which  are  sensitive  to  Ultrasonic  Waves.  Use  of  any  Ultrasonic Processes (cleaning, welding etc.) may cause damage to the module.  u-blox gives no warranty against damages to the cellular modules caused by any Ultrasonic Processes.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Approvals     Page 126 of 141 4 Approvals   For the complete  list of  all  the  certification schemes approvals  of  TOBY-L2 and  MPCI-L2 series  modules and the corresponding declarations of conformity, see the u-blox web-site (http://www.u-blox.com/).  4.1 Product certification approval overview Product certification approval is the process of certifying that a product has passed all tests and criteria required by specifications, typically called “certification schemes” that can be divided into three distinct categories:  Regulatory certification o Country specific approval required by local government in most regions and countries, such as:  CE (Conformité Européenne) marking for European Union  FCC (Federal Communications Commission) approval for United States  Industry certification o Telecom industry specific approval verifying the interoperability between devices and networks:  GCF  (Global  Certification  Forum),  partnership  between  European  device  manufacturers  and network operators to ensure and verify global interoperability between devices and networks  PTCRB  (PCS  Type  Certification  Review  Board),  created  by  United  States  network  operators  to ensure and verify interoperability between devices and North America networks  Operator certification o Operator specific approval required by some mobile network operator, such as:  AT&T network operator in United States  Even if TOBY-L2 and MPCI-L2 series modules are approved under all major certification schemes, the application device  that  integrates  TOBY-L2  and  MPCI-L2  series  modules  must  be  approved  under  all  the  certification schemes required by the specific application device to be deployed in the market. The required certification scheme approvals and relative testing specifications differ depending on the country or the  region  where  the  device  that  integrates  TOBY-L2  and  MPCI-L2  series  modules  must  be  deployed,  on  the relative vertical market of the device, on type, features and functionalities of the whole application device, and on the network operators where the device must operate.   The certification of the application device that integrates a TOBY-L2  module and the compliance of the application  device  with  all  the  applicable  certification  schemes,  directives  and  standards  are  the  sole responsibility of the application device manufacturer.  TOBY-L2 and MPCI-L2 series modules are certified according to all capabilities and options stated in the Protocol Implementation Conformance Statement document (PICS) of the module. The PICS, according to the  3GPP TS 51.010-2 [24], 3GPP TS 34.121-2 [25], 3GPP TS 36.521-2 [26] and 3GPP TS 36.523-2 [27], is a statement of the implemented and supported capabilities and options of a device.   The PICS document of the application device integrating  TOBY-L2 and MPCI-L2 series modules must  be updated  from  the  module  PICS  statement  if  any  feature  stated  as  supported  by  the module  in  its PICS document  is  not  implemented  or  disabled  in  the  application  device.  For  more  details  regarding  the  AT commands settings that affect the PICS, see the u-blox AT Commands Manual [3].  Check the specific settings required for mobile network operators approvals as they may differ from the AT commands settings defined in the module as integrated in the application device.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Approvals Page 127 of 141 4.2 Federal Communications Commission and Industry Canada notice Federal Communications Commission (FCC) IDs: XPYTOBYL200XPYTOBYL210Industry Canada (IC) Certification Numbers: 8595A-TOBYL2008595A-TOBYL2104.2.1 Safety warnings review the structure Equipment for building-in. The requirements for fire enclosure must be evaluated in the end productThe  clearance  and  creepage  current  distances  required  by  the  end  product  must  be  withheld  when  themodule is installedThe cooling of the end product shall not negatively be influenced by the installation of the moduleExcessive sound pressure from earphones and headphones can cause hearing lossNo natural rubbers, hygroscopic materials, or materials containing asbestos are employed4.2.2 Declaration of Conformity  This device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions: this device may not cause harmful interferencethis device must accept any interference received, including interference that may cause undesired operationRadiofrequency  radiation  exposure  Information:  this  equipment  complies  with  FCC  radiation exposure limits prescribed for an uncontrolled environment for fixed and mobile use conditions. This equipment should be  installed and  operated  with  a minimum  distance of 20 cm between the  radiator  and  the  body  of  the  user  or  nearby  persons.  This  transmitter  must  not  be  co-located or operating in conjunction with any other antenna or transmitter except as authorized in the certification of the product. The  gain  of  the  system  antenna(s)  used  for  the  TOBY-L2  and  MPCI-L2  series  modules  (i.e.  the combined  transmission  line,  connector,  cable  losses  and  radiating  element  gain)  must  not exceed  9.8  dBi  (700  MHz),  4.3  dBi  (850  MHz),  2.8  dBi  (1900  MHz),  5.5  dBi  (1700  MHz),  6.0  dBi (2500  MHz),  6.30  dBi  (900  MHz),  9.35  dBi  (1800  MHz),  11.92  dBi  (FDD1),  9.03  dBi  (FDD8),  for mobile and fixed or mobile operating configurations. 4.2.3 Modifications The  FCC  requires  the  user  to  be  notified  that  any  changes  or  modifications  made  to  this  device  that  are  not expressly approved by u-blox could void the user's authority to operate the equipment. Manufacturers  of  mobile  or  fixed  devices  incorporating  the  TOBY-L2  and  MPCI-L2  series modules are authorized to use the FCC Grants and Industry Canada Certificates of the TOBY-L2 and MPCI-L2 series modules for their own final products according to the conditions referenced in the certificates.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04 Advance Information  Approvals     Page 128 of 141  The FCC Label shall in the above case be visible from the outside, or the host device shall bear a second label stating: "Contains FCC ID: XPYTOBYL200" resp. "Contains FCC ID: XPYTOBYL210" resp.  The IC Label shall in the above case be visible from the outside, or the host device shall bear a second label stating: "Contains IC: 8595A-TOBYL200" resp. "Contains IC: 8595A-TOBYL210" resp.  Canada, Industry Canada (IC) Notices This Class B digital apparatus complies with Canadian CAN ICES-3(B) / NMB-3(B) and RSS-210. Operation is subject to the following two conditions: o this device may not cause interference o this device must accept any interference, including interference that may cause undesired operation of the device Radio Frequency (RF) Exposure Information The  radiated  output  power  of  the  u-blox  Cellular  Module  is  below  the  Industry  Canada  (IC) radio frequency exposure limits. The  u-blox  Cellular Module should be used in such a  manner such that the potential for human contact during normal operation is minimized. This  device  has  been  evaluated  and  shown  compliant  with  the  IC  RF  Exposure  limits  under mobile exposure conditions (antennas are greater than 20 cm from a person's body). This device has been certified for use in Canada. Status of  the listing in the  Industry Canada’s REL (Radio Equipment List) can be found at the following web address: http://www.ic.gc.ca/app/sitt/reltel/srch/nwRdSrch.do?lang=eng Additional  Canadian  information  on  RF  exposure  also  can  be  found  at  the  following  web address: http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf08792.html  IMPORTANT:  Manufacturers  of  portable  applications  incorporating  the  TOBY-L2  and  MPCI-L2 series  modules  are  required  to  have  their  final  product  certified  and  apply  for  their  own  FCC Grant and Industry Canada Certificate related to the specific portable device. This is mandatory to meet the SAR requirements for portable devices. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.  Canada, avis d'Industrie Canada (IC) Cet  appareil  numérique  de  classe  B  est  conforme  aux  normes  canadiennes  CAN  ICES-3(B)  / NMB-3(B) et RSS-210. Son fonctionnement est soumis aux deux conditions suivantes: o cet appareil ne doit pas causer d'interférence o cet  appareil  doit  accepter  toute  interférence,  notamment  les  interférences  qui  peuvent affecter son fonctionnement Informations concernant l'exposition aux fréquences radio (RF) La puissance de sortie émise par l’appareil de sans fil u-blox Cellular Module est inférieure à la limite  d'exposition  aux  fréquences  radio  d'Industrie  Canada  (IC).  Utilisez  l’appareil  de  sans  fil u-blox  Cellular  Module  de  façon  à  minimiser  les  contacts  humains  lors  du  fonctionnement normal. Ce  périphérique  a  été  évalué  et  démontré  conforme  aux  limites  d'exposition  aux  fréquences radio  (RF)  d'IC  lorsqu'il  est  installé  dans  des  produits  hôtes  particuliers  qui  fonctionnent  dans des  conditions  d'exposition  à  des  appareils  mobiles  (les  antennes  se  situent  à  plus  de  20 centimètres du corps d'une personne).
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Approvals     Page 129 of 141 Ce  périphérique  est  homologué  pour  l'utilisation  au  Canada.  Pour  consulter  l'entrée correspondant  à  l’appareil  dans  la  liste  d'équipement  radio  (REL  -  Radio  Equipment  List) d'Industrie Canada rendez-vous sur: http://www.ic.gc.ca/app/sitt/reltel/srch/nwRdSrch.do?lang=fra Pour des informations supplémentaires concernant l'exposition aux RF au  Canada rendez-vous sur: http://www.ic.gc.ca/eic/site/smt-gst.nsf/fra/sf08792.html   IMPORTANT: les fabricants d'applications portables contenant les modules TOBY-L2 and MPCI-L2 series doivent faire certifier leur produit final et déposer directement leur candidature pour une certification FCC ainsi que pour un certificat Industrie Canada délivré par l'organisme chargé de ce  type  d'appareil  portable.  Ceci  est  obligatoire  afin  d'être  en  accord  avec  les  exigences  SAR pour les appareils portables. Tout changement ou modification non expressément approuvé par la partie responsable de la certification peut annuler le droit d'utiliser l'équipement.  4.3 R&TTED and European Conformance CE mark The modules have been evaluated against the essential requirements of the 1999/5/EC Directive. In  order  to  satisfy  the  essential  requirements  of  the  1999/5/EC  Directive,  the  modules are  compliant  with  the following standards:  Radio Frequency spectrum use (R&TTE art. 3.2): o EN 301 511 V9.0.2 o EN 301 908-1 V6.2.1 o EN 301 908-2 V6.2.1 o EN 301 908-13 (v5.2.1)  EN 301 908-13 (v5.2.1)Electromagnetic Compatibility (R&TTE art. 3.1b): o EN 301 489-1 V1.9.2 o EN 301 489-7 V1.3.1 o EN 301 489-24 V1.5.1  Health and Safety (R&TTE art. 3.1a) o EN 60950-1:2006 + A11:2009 + A1:2010+A12:2011+A2: 2013 o EN 62311:2008 The  conformity  assessment  procedure  for  the  modules,  referred  to  in  Article  10  and  detailed  in  Annex  IV  of Directive 1999/5/EC, has been followed with the involvement of the following Notified Body number: 1588 Thus, the following marking is included in the product:   1588
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Product testing     Page 130 of 141 5 Product testing 5.1 u-blox in-series production test u-blox focuses  on  high quality  for  its  products.  All  units  produced are  fully  tested  automatically  in  production line. Stringent quality control process has been implemented in the production line. Defective units are analyzed in detail to improve the production quality. This  is  achieved  with  automatic  test  equipment  (ATE)  in  production  line,  which  logs  all  production  and measurement data. A detailed test report for each unit can be generated from the system.  Figure 72 illustrates typical automatic test equipment (ATE) in a production line.  The following typical tests are among the production tests.   Digital self-test (firmware download, Flash firmware verification, IMEI programming)  Measurement of voltages and currents  Adjustment of ADC measurement interfaces  Functional tests (USB interface communication, SIM card communication)  Digital tests (GPIOs and other interfaces)  Measurement and calibration of RF characteristics in all supported bands (such as receiver S/N verification, frequency tuning of reference clock, calibration of transmitter and receiver power levels, etc.)  Verification of RF characteristics after calibration (i.e. modulation accuracy, power levels, spectrum, etc. are checked to ensure they are all within tolerances when calibration parameters are applied)    Figure 72: Automatic test equipment for module tests
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Product testing     Page 131 of 141 5.2 Test parameters for OEM manufacturer Because of the testing  done by u-blox (with 100% coverage), an OEM manufacturer does not need to repeat firmware tests or measurements of the module RF performance or tests over analog and digital interfaces in their production test. However, an OEM manufacturer should focus on:  Module assembly on the device; it should be verified that: o Soldering and handling process did not damage the module components o All module pins are well soldered on device board o There are no short circuits between pins  Component assembly on the device; it should be verified that: o Communication with host controller can be established o The interfaces between module and device are working o Overall RF performance test of the device including antenna  Dedicated  tests  can  be  implemented  to  check  the  device.  For  example,  the  measurement  of  module  current consumption when set in a specified status can detect a short circuit if compared with a “Golden Device” result. In addition, module AT commands can be used to perform functional tests (communication with host controller, check SIM interface, GPIOs, etc.) and to perform RF performance tests: see the following two sections for details.  5.2.1 “Go/No go” tests for integrated devices A ‘Go/No go’ test is typically to compare the signal quality with a “Golden Device” in a location with excellent network  coverage  and  known  signal  quality.  This  test  should  be  performed  after  data  connection  has  been established. AT+CSQ is the typical AT command used to check signal quality in term of RSSI. See the u-blox AT Commands Manual [3] for detail usage of the AT command.    These kinds of test may be useful as a ‘go/no go’ test but not for RF performance measurements.  This test is suitable to check the functionality of communication with host controller, SIM card as well as power supply. It is also a means to verify if components at antenna interface are well soldered.  5.2.2 RF functional tests  The overall RF functional test of the device including the antenna can be performed with basic instruments such as  a  spectrum  analyzer  (or  an  RF  power  meter)  and  a  signal  generator  with  the  assistance  of  AT+UTEST command over AT command user interface. The  AT+UTEST  command  provides  a  simple  interface  to  set  the  module  to  Rx  or  Tx  test  modes  ignoring  the LTE/3G/2G signaling protocol. The command can set the module into:  transmitting mode in a specified channel and power level in all supported modulation schemes and bands  receiving mode in a specified channel to returns the measured power level in all supported bands    See the u-blox AT Commands Manual [3] and the End user test Application Note [24], for the AT+UTEST command syntax description and detail guide of usage.
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Product testing     Page 132 of 141 This feature allows the measurement of the transmitter and receiver power levels to check component assembly related  to  the  module  antenna  interface  and  to  check  other  device  interfaces  from  which  depends  the  RF performance.   To  avoid  module  damage  during  transmitter  test,  a  proper  antenna  according  to  module specifications or a 50  termination must be connected to ANT1 port.  To avoid module damage during receiver test the maximum power level received at ANT1 and ANT2 ports must meet module specifications.   The AT+UTEST command sets the module to emit RF power ignoring  LTE/3G/2G signaling protocol. This emission  can  generate  interference  that  can  be  prohibited  by  law  in  some  countries.  The  use  of  this feature is intended for testing purpose in controlled environments by qualified user and must not be used during  the  normal  module  operation.  Follow  instructions  suggested  in  u-blox  documentation.  u-blox assumes no responsibilities for the inappropriate use of this feature.  Figure 73 illustrates a typical test setup for such RF functional test.  Application BoardTOBY-L2 seriesMPCI-L2 seriesANT1Application ProcessorAT   commandsCellular antennaSpectrumAnalyzerorPowerMeterINWideband antennaTXApplication BoardTOBY-L2 seriesMPCI-L2 seriesANT1Application ProcessorAT   commandsCellular antennasSignalGeneratorOUTWideband antennaRXANT2 Figure 73: Setup with spectrum analyzer or power meter and signal generator for radiated measurements
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Appendix      Page 133 of 141 Appendix A Glossary  3GPP 3rd Generation Partnership Project 8-PSK 8 Phase-Shift Keying modulation 16QAM 16-state Quadrature Amplitude Modulation 64QAM 64-state Quadrature Amplitude Modulation ACM Abstract Control Model  ADC Analog to Digital Converter AP Application Processor ASIC Application-Specific Integrated Circuit AT AT Command Interpreter Software Subsystem, or attention CSFB Circuit Switched Fall-Back  DC Direct Current  DCE Data Communication Equipment DDC Display Data Channel interface DL Down-Link (Reception) DRX Discontinuous Reception DSP Digital Signal Processing DTE Data Terminal Equipment ECM Ethernet networking Control Model EDGE Enhanced Data rates for GSM Evolution EMC Electro-Magnetic Compatibility EMI Electro-Magnetic Interference ESD Electro-Static Discharge ESR Equivalent Series Resistance E-UTRA Evolved Universal Terrestrial Radio Access  FDD Frequency Division Duplex  FEM Front End Module FOAT Firmware Over AT commands FOTA Firmware Over The Air FTP File Transfer Protocol FW Firmware GND Ground GNSS Global Navigation Satellite System GPIO General Purpose Input Output GPRS General Packet Radio Service GPS Global Positioning System HBM Human Body Model HSIC High Speed Inter Chip  HSDPA High Speed Downlink Packet Access HSUPA High Speed Uplink Packet Access HTTP HyperText Transfer Protocol  HW Hardware I/Q In phase and Quadrature I2C Inter-Integrated Circuit interface I2S Inter IC Sound interface IP Internet Protocol
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Appendix      Page 134 of 141 LDO Low-Dropout LGA Land Grid Array LNA Low Noise Amplifier LPDDR Low Power Double Data Rate synchronous dynamic RAM memory LTE Long Term Evolution  M2M Machine-to-Machine MBIM Mobile Broadband Interface Model MIMO Multi-Input Multi-Output N/A Not Applicable N.A. Not Available NCM Network Control Model OTA Over The Air PA Power Amplifier PCM Pulse Code Modulation PCN / IN Product Change Notification / Information Note PCS Personal Communications Service PFM Pulse Frequency Modulation PMU Power Management Unit PWM Pulse Width Modulation QPSK  Quadrature Phase Shift Keying  RF Radio Frequency RMII Reduced Media Independent Interface RNDIS Remote Network Driver Interface Specification RSE Radiated Spurious Emission RTC Real Time Clock SAW Surface Acoustic Wave SDIO Secure Digital Input Output  SIM Subscriber Identification Module SMS Short Message Service SPI Serial Peripheral Interface SRF Self Resonant Frequency SSL Secure Socket Layer TBD To Be Defined TCP Transmission Control Protocol TDD Time Division Duplex  TDMA Time Division Multiple Access TIS Total Isotropic Sensitivity TP Test-Point TRP Total Radiated Power UART Universal Asynchronous Receiver-Transmitter UDP User Datagram Protocol  UICC Universal Integrated Circuit Card UL Up-Link (Transmission) UMTS Universal Mobile Telecommunications System USB Universal Serial Bus VCO Voltage Controlled Oscillator VoLTE Voice over LTE VSWR Voltage Standing Wave Ratio
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Appendix      Page 135 of 141 B Migration between TOBY-L1 and TOBY-L2 B.1 Overview TOBY-L1 and TOBY-L2  series cellular modules have exactly the same TOBY form factor (35.6 x 24.8 mm LGA) with  exactly  the  same  152-pad  layout  as  described  in  Figure  74,  so  that  the  modules  can  be  alternatively mounted on a single application board using exactly the same copper mask, solder mask and paste mask.  11107542121191816151312292726242386322201714282596566697172747555575860616364474950525368707354565962485167RSVDRSVDGNDVCCVCCGNDRSVDRSVDSIM_IOSIM_RSTGPIO5GPIO6RSVDRSVDRSVDRSVDRSVDRSVDRSVDRSVDVCCGNDRSVDSIM_CLKVSIMRSVDRSVDRSVDRSVDRSVDRSVDRSVDV_INTRSVDGNDRSVDGPIO1RSVDRSVDRSVDRSVDRSVDRSVDRSVDUSB_D-RSVDGPIO3RESET_NRSVDRSVDV_BCKPGPIO2PWR_ONRSVDRSVDUSB_D+GPIO4RSVD90 91 927877769310079 80 83 85 86 88 8982 84 8781GNDRSVDGNDGNDRSVDGNDGNDGNDGNDGNDGNDGNDGNDGNDRSVDANT2ANT132 31 3044454614515243 42 39 37 36 34 3340 38 3541GNDRSVDGNDGNDRSVDGNDRSVDRSVDRSVDRSVDRSVDRSVDRSVDRSVDRSVDRSVDRSVD99 98 97 96 95 94106 105 104 103 102 101108 107124 123130 129 128 127 126 125136 135 134 133 132 131138 137144 143 142 141 140 139151 150 149 148 147 146114 113 112 111 110 109120 119 118 117 116 115122 121Pin 93-152: GNDTOBY-L1Top view11107542121191816151312292726242386322201714282596566697172747555575860616364474950525368707354565962485167SDIO_CMDSDIO_D0GNDVCCVCCGNDANT_DETSDASIM_IOSIM_RSTGPIO5GPIO6SDIO_D2SDIO_CLKRSVDRSVDI2S_WAI2S_CLKI2S_RXDSDIO_D1VCCGNDSCLSIM_CLKVSIMHOST_SELECT1RSVDI2S_TXDSDIO_D3RIDSRRSVDV_INTVUSB_DETGNDRSVDGPIO1RSVDRSVDTXDCTSDTRDCDRSVDUSB_D-HOST_SELECT0GPIO3RESET_NRSVDRSVDV_BCKPGPIO2PWR_ONRXDRTSUSB_D+GPIO4RSVD90 91 927877769310079 80 83 85 86 88 8982 84 8781GNDRSVDGNDGNDRSVDGNDGNDGNDGNDGNDGNDGNDGNDGNDRSVDANT2ANT132 31 3044454614515243 42 39 37 36 34 3340 38 3541GNDRSVDGNDGNDRSVDGNDRSVDRSVDRSVDRSVDRSVDRSVDRSVDRSVDRSVDRSVDRSVD99 98 97 96 95 94106 105 104 103 102 101108 107124 123130 129 128 127 126 125136 135 134 133 132 131138 137144 143 142 141 140 139151 150 149 148 147 146114 113 112 111 110 109120 119 118 117 116 115122 121Pin 93-152: GNDTOBY-L2Top view Figure 74: TOBY-L1 and TOBY-L2 series modules pad layout and pin assignment Table 46 summarizes the interfaces provided: TOBY-L2 series modules make available additional interfaces over pins remarked as reserved on TOBY-L1 series modules (highlighted in blue in Figure 74).  Module Radio Access Technology Power System SIM Serial Audio GPIO  LTE category LTE bands HSDPA category HSUPA category 3G bands GPRS/EDGE class 2G bands MIMO 2x2 / Rx diversity Antenna Detection VCC module supply in V_BCKP V_INT 1.8 V supply out PWR_ON RESET_N Host select SIM 1.8 V / 3.0 V SIM detection UART 1.8 V USB 2.0 High-Speed SDIO 1.8 V DCC (I2C) 1.8 V Analog audio Digital audio  GPIOs 1.8 V Network indication GNSS supply enable  GNSS Tx data ready  GNSS RTC sharing  Clock output WiFi control Antenna tuning TOBY-L100 3 4, 13      •  • • • • •  •   •     F •       TOBY-L200 4 2,4,5, 7,17 24 6 1,2,4, 5,8 12 Quad • F • • • • • F • F F • F F  F F • F F F F F F TOBY-L210 4 1,3,5, 7,8,20 24 6 1,2, 5,8 12 Quad • F • • • • • F • F F • F F  F F • F F F F F F F = will be supported in future product version “01” Table 46: Summary of TOBY-L1 series and TOBY-L2 series modules interfaces
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Appendix      Page 136 of 141 B.2 Pin-out comparison between TOBY-L1 and TOBY-L2   TOBY-L1  TOBY-L2   Pin No Pin Name Description Pin Name Description Remarks for migration 1 RSVD Reserved RSVD Reserved  2 GND Ground GND Ground  3 V_BCKP RTC Supply Output 2.5 V output only RTC backup function not available V_BCKP RTC Supply Input/Output 3.0 V output 1.4 V – 4.2 V input (RTC backup) RTC back-up: No  Yes 4 RSVD Reserved VUSB_DET VBUS USB supply (5 V) detection Reserved  VBUS USB detection 5 V_INT Interfaces Supply Output 1.8 V output V_INT Interfaces Supply Output 1.8 V output No functional difference 6 RSVD Reserved RSVD Reserved This pin must be connected to GND No connect  Connect to GND 7-9 RSVD Reserved RSVD Reserved  10 RSVD Reserved DSR UART DSR Output / GPIO Not supported by TOBY-L2x0-00S Reserved  UART / GPIO 11 RSVD Reserved RI UART RI Output / GPIO Not supported by TOBY-L2x0-00S Reserved  UART / GPIO 12 RSVD Reserved DCD UART DCD Output / GPIO Not supported by TOBY-L2x0-00S Reserved  UART / GPIO 13 RSVD Reserved DTR UART DTR Input / GPIO Not supported by TOBY-L2x0-00S Reserved  UART / GPIO 14 RSVD Reserved RTS UART RTS Input  Not supported by TOBY-L2x0-00S Reserved  UART 15 RSVD Reserved CTS UART CTS Output  Not supported by TOBY-L2x0-00S Reserved  UART 16 RSVD Reserved TXD UART Data Input Not supported by TOBY-L2x0-00S Reserved  UART 17 RSVD Reserved RXD UART Data Output Not supported by TOBY-L2x0-00S Reserved  UART 18-19 RSVD Reserved RSVD Reserved  20 PWR_ON Power-on Input No internal pull-up PWR_ON Power-on Input Internal 50k pull-up to VCC Pull-up: External  Internal 21 GPIO1 GPIO Not supported by TOBY-L100-00S except Network Status Indication GPIO1 GPIO  Not supported by TOBY-L2x0-00S except WWAN Status Indication No functional difference 22 GPIO2 GPIO Not supported by TOBY-L100-00S GPIO2 GPIO Not supported by TOBY-L2x0-00S  23 RESET_N Reset signal Input Internal 10k pull-up to V_BCKP Switch-off function only RESET_N Reset signal Input Internal 50k pull-up to VCC Reset, Switch-on, Switch-off Internal pull-up: V_BCKP  VCC Switch-off  Reset, Switch-on/off 24 GPIO3 GPIO  Not supported by TOBY-L100-00S GPIO3 GPIO Not supported by TOBY-L2x0-00S  25 GPIO4 GPIO  Not supported by TOBY-L100-00S GPIO4 GPIO Not supported by TOBY-L2x0-00S  26 RSVD Reserved HOST_SELECT0 Input for selection of module configuration by the host  Not supported by TOBY-L2x0-00S Reserved  HOST_SELECT0 27 USB_D- USB Data I/O (D-) USB_D- USB Data I/O (D-) No functional difference 28 USB_D+ USB Data I/O (D+) USB_D+ USB Data I/O (D+) No functional difference 29 RSVD Reserved RSVD Reserved  30 GND Ground GND Ground  31 RSVD Reserved RSVD Reserved  32 GND Ground GND Ground  33-43 RSVD Reserved RSVD Reserved  44 GND Ground GND Ground  45 RSVD Reserved RSVD Reserved  46 GND Ground GND Ground  47-49 RSVD Reserved RSVD Reserved
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Appendix      Page 137 of 141  TOBY-L1  TOBY-L2   Pin No Pin Name Description Pin Name Description Remarks for migration 50 RSVD Reserved I2S_WA I2S Word Alignment / GPIO Not supported by TOBY-L2x0-00S Reserved  I2S / GPIO 51 RSVD Reserved I2S_TXD I2S Data Output / GPIO  Not supported by TOBY-L2x0-00S Reserved  I2S / GPIO 52 RSVD Reserved I2S_CLK I2S Clock / GPIO  Not supported by TOBY-L2x0-00S Reserved  I2S / GPIO 53 RSVD Reserved I2S_RXD I2S Data Input / GPIO  Not supported by TOBY-L2x0-00S Reserved  I2S / GPIO  54 RSVD Reserved SCL I2C Clock Output  Not supported by TOBY-L2x0-00S Reserved  I2C 55 RSVD Reserved SDA I2C Data I/O  Not supported by TOBY-L2x0-00S Reserved  I2C 56 SIM_CLK SIM Clock Output SIM_CLK SIM Clock Output No functional difference 57 SIM_IO SIM Data I/O SIM_IO SIM Data I/O No functional difference 58 SIM_RST SIM Reset Output SIM_RST SIM Reset Output No functional difference 59 VSIM SIM Supply Output VSIM SIM Supply Output No functional difference 60 GPIO5 GPIO  Not supported by TOBY-L100-00S GPIO5 GPIO SIM detection  61 GPIO6 GPIO  Not supported by TOBY-L100-00S GPIO6 GPIO  62 RSVD Reserved HOST_SELECT1 Input for selection of module configuration by the host  Not supported by TOBY-L2x0-00S Reserved  HOST_SELECT1 63 RSVD Reserved SDIO_D2 SDIO serial data [2]  Not supported by TOBY-L2x0-00S Reserved  SDIO 64 RSVD Reserved SDIO_CLK SDIO serial clock  Not supported by TOBY-L2x0-00S Reserved  SDIO 65 RSVD Reserved SDIO_CMD SDIO command  Not supported by TOBY-L2x0-00S Reserved  SDIO 66 RSVD Reserved SDIO_D0 SDIO serial data [0]  Not supported by TOBY-L2x0-00S Reserved  SDIO 67 RSVD Reserved SDIO_D3 SDIO serial data [3]  Not supported by TOBY-L2x0-00S Reserved  SDIO 68 RSVD Reserved SDIO_D1 SDIO serial data [1]  Not supported by TOBY-L2x0-00S Reserved  SDIO 69 GND Ground GND Ground  70-72 VCC Module Supply Input  3.40 V – 4.50 V normal range No 2G current pulses No switch-on applying VCC VCC Module Supply Input 3.40 V – 4.35 V normal range High 2G current pulses  Switch-on applying VCC No VCC functional difference 73-74 GND Ground GND Ground  75 RSVD Reserved ANT_DET Antenna Detection Input  Not supported by TOBY-L2x0-00S Reserved  ANT_DET 76 GND Ground GND Ground  77 RSVD Reserved RSVD Reserved  78-80 GND Ground GND Ground  81 ANT1 RF Antenna Input/Output Two LTE bands No 3G bands No 2G bands ANT1 RF Antenna Input/Output Up to six LTE bands Up to five 3G bands Four 2G bands No RF functional difference Different operating bands support 82-83 GND Ground GND Ground  84 RSVD Reserved RSVD Reserved  85-86 GND Ground GND Ground  87 ANT2 RF Antenna Input LTE MIMO 2x2 No 3G Rx diversity ANT2 RF Antenna Input  LTE MIMO 2x2 3G Rx diversity No RF functional difference  Different operating bands support 88-90 GND Ground GND Ground  91 RSVD Reserved RSVD Reserved  92-152 GND Ground GND Ground  Table 47: TOBY-L1 and TOBY-L2 pin assignment with remarks for migration
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Appendix      Page 138 of 141 B.3 Schematic for TOBY-L1 and TOBY-L2 integration Figure 75 shows an example of schematic diagram where a TOBY-L100-00S or TOBY-L2x0-00S module can be integrated into the same application board, using all the available interfaces and functions of the  modules. The different mounting options for the external parts are highlighted in different colors as described in the legend, according to the interfaces supported by the relative modules.  3V8GND330uF 100nF 10nFTOBY-L100-00S / TOBY-L2x0-00S71 VCC72 VCC70 VCC3V_BCKP23 RESET_NApplication ProcessorOpen Drain Output20 PWR_ONOpen Drain OutputGND GNDUSB 2.0 HostD-D+27 USB_D-28 USB_D+68pF47pFSIM Card ConnectorCCVCC (C1)CCVPP (C6)CCIO (C7)CCCLK (C3)CCRST (C2)GND (C5)47pF 47pF 100nF47pF ESD ESD ESD ESDPrimary AntennaTPTPSecondary Antenna3V8Network Indicator21 GPIO160 GPIO525 GPIO424 GPIO322 GPIO2TP15pF 8.2pF+330uF+GNDRTC back-up16 RSVD / TXD17 RSVD / RXD12 RSVD / DCD14 RSVD / RTS15 RSVD / CTS13 RSVD / DTR10 RSVD / DSR11 RSVD / RITPTPTPTPTPTPTPTP26 RSVD / HOST_SELECT062 RSVD / HOST_SELECT1100k059VSIM57SIM_IO56SIM_CLK58SIM_RST81ANT187ANT25V_INT61 GPIO675RSVD / ANT_DET65RSVD / SDIO_CMD66RSVD / SDIO_D068RSVD / SDIO_D163RSVD / SDIO_D267RSVD / SDIO_D364RSVD / SDIO_CLKRSVD / SDARSVD / SCL2627RSVDRSVD653RSVD / I2S_RXD51RSVD / I2S_TXD52RSVD / I2S_CLK50RSVD / I2S_WARSVD 49 TPMount for TOBY-L2Mount for TOBY-L1Mount for TOBY-L1 and TOBY-L2LEGENDVBUS 4VUSB_DET100nF0 Figure 75: Example of complete schematic diagram to integrate TOBY-L100-00S / TOBY-L2x0-00S on the same application board
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Related documents      Page 139 of 141 Related documents [1] u-blox TOBY-L2 series Data Sheet, Docu No UBX-13004573 [2] u-blox MPCI-L2 series Data Sheet, Docu No UBX-13004749 [3] u-blox AT Commands Manual, Docu No UBX-13002752 [4] u-blox EVK-L20 / EVK-L21 User Guide, Docu No UBX-14000422 [5] u-blox Firmware Update Application Note, Docu No UBX-13001845 [6] Universal Serial Bus Revision 2.0 specification, http://www.usb.org/developers/docs/usb20_docs/  [7] ITU-T Recommendation V.24 - 02-2000 - List of definitions for interchange circuits between the Data Terminal Equipment (DTE) and the Data Circuit-terminating Equipment (DCE),  http://www.itu.int/rec/T-REC-V.24-200002-I/en [8] 3GPP TS 27.007 - AT command set for User Equipment (UE)  [9] 3GPP TS 27.005 - Use of Data Terminal Equipment - Data Circuit terminating; Equipment (DTE - DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS)  [10] 3GPP TS 27.010 - Terminal Equipment to User Equipment (TE-UE) multiplexer protocol [11] u-blox Mux Implementation Application Note, Docu No UBX-13001887 [12] I2C-bus specification and user manual - Rev. 5 - 9 October 2012 - NXP Semiconductors, http://www.nxp.com/documents/user_manual/UM10204.pdf [13] u-blox GNSS Implementation Application Note, Docu No UBX-13001849  [14] PCI Express Mini Card Electromechanical Specification, Revision 2.0, April 21, 2012 [15] 3GPP TS 26.267 – eCall Data Transfer; In-band modem solution; General description [16] BS EN 16062:2011 – Intelligent transport systems – eSafety – eCall high level application requirements [17] ETSI TS 122 101 – Service aspects; Service principles (3GPP TS 22.101) [18] u-blox  eCall / ERA-GLONASS Application Note, Docu No UBX-13001924 [19] SIM Access Profile Interoperability Specification, http://www.bluetooth.org/ [20] CENELEC EN 61000-4-2 (2001): "Electromagnetic compatibility (EMC) – Part 4-2: Testing and measurement techniques – Electrostatic discharge immunity test". [21] ETSI EN 301 489-1 V1.8.1: “Electromagnetic compatibility and Radio spectrum Matters (ERM); EMC standard for radio equipment and services; Part 1: Common technical requirements” [22] ETSI EN 301 489-7 V1.3.1 “Electromagnetic compatibility and Radio spectrum Matters (ERM); EMC standard for radio equipment and services; Part 7: Specific conditions for mobile and portable radio and ancillary equipment of digital cellular radio telecommunications systems“ [23] ETSI EN 301 489-24 V1.4.1 "Electromagnetic compatibility and Radio spectrum Matters (ERM); EMC standard for radio equipment and services; Part 24: Specific conditions for IMT-2000 CDMA Direct Spread (UTRA) for Mobile and portable (UE) radio and ancillary equipment" [24] 3GPP TS 51.010-2 - Technical Specification Group GSM/EDGE Radio Access Network; Mobile Station (MS) conformance specification; Part 2: Protocol Implementation Conformance Statement (PICS) [25] 3GPP TS 34.121-2 - Technical Specification Group Radio Access Network; User Equipment (UE) conformance specification; Radio transmission and reception (FDD); Part 2: Implementation Conformance Statement (ICS) [26] 3GPP TS 36.521-2 - Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment conformance specification; Radio transmission and reception; Part 2: Implementation Conformance Statement (ICS) [27] 3GPP TS 36.523-2 - Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet Core (EPC); User Equipment conformance specification; Part 2: Implementation Conformance Statement (ICS) [28] u-blox End user test Application Note, Docu No UBX-13001922 [29] u-blox Package Information Guide, Docu No UBX-14001652  Some of the above documents can be downloaded from u-blox web-site (http://www.u-blox.com/).
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Revision history      Page 140 of 141 Revision history Revision Date Name Status / Comments R01 20-Dec-2013 sses Initial release for TOBY-L2 series R02 21-Mar-2014 sses Initial release including MPCI-L2 series UART and GPIOs remarked as not supported by TOBY-L2x0-00S R03 23-Jul-2014 sses Advance Information document status  Updated MPCI-L2 descriptions Updated USB description and design-in, including VUSB_DET pin previously RSVD  Updated MPCI-L2 thickness and installation guidelines Updated MPCI-L2 power-off procedure Updated MPCI-L2 pins 3, 5, 44, 46 definition: Not Connected instead of GPI/GPO Updated GPIOs definition and description  Additional design-in examples, minor corrections and improvements R04 30-Sep-2014 lpah Updated FW version for Engineering Samples Additional design-in and minor corrections  R05 17-Oct-2014 lpah Corrected MPCI-L2 pinout
TOBY-L2 and MPCI-L2 series - System Integration Manual UBX-13004618 - R04  Advance Information  Contact      Page 141 of 141 Contact For complete contact information visit us at http://www.u-blox.com/  u-blox Offices     North, Central and South America u-blox America, Inc. Phone:  +1 703 483 3180 E-mail:  info_us@u-blox.com Regional Office West Coast: Phone:  +1 408 573 3640 E-mail:  mailto:info_us@u-blox.com Technical Support: Phone:  +1 703 483 3185 E-mail:  mailto:support_us@u-blox.com  Headquarters Europe, Middle East, Africa u-blox AG  Phone:  +41 44 722 74 44 E-mail:  info@u-blox.com Support:  mailto:support@u-blox.com  Asia, Australia, Pacific u-blox Singapore Pte. Ltd. Phone:  +65 6734 3811 E-mail:  info_ap@u-blox.com Support:  support_ap@u-blox.com Regional Office Australia: Phone:  +61 2 8448 2016 E-mail:  info_anz@u-blox.com Support:  support_ap@u-blox.com Regional Office China (Beijing): Phone:  +86 10 68 133 545 E-mail:  info_cn@u-blox.com Support:  support_cn@u-blox.com Regional Office China (Shenzhen): Phone:  +86 755 8627 1083 E-mail:  info_cn@u-blox.com Support:  support_cn@u-blox.com Regional Office India: Phone:  +91 959 1302 450 E-mail:  mailto:info_in@u-blox.com Support:  mailto:support_in@u-blox.com Regional Office Japan: Phone:  +81 3 5775 3850 E-mail:  info_jp@u-blox.com Support:  support_jp@u-blox.com Regional Office Korea: Phone:  +82 2 542 0861 E-mail:  info_kr@u-blox.com  Support:  support_kr@u-blox.com Regional Office Taiwan: Phone:  +886 2 2657 1090 E-mail:  info_tw@u-blox.com  Support:  support_tw@u-blox.com

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