MobileTek Communication L600 LTE-CATM1 IOT User Manual 2AK9DL600

Shanghai MobileTek Communication Ltd. LTE-CATM1 IOT 2AK9DL600

Users Manual

L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 1 L600 Hardware Design LTE Module Series Version： V1.0 Date： 2017-06-06 Shanghai Mobiletek Communication Ltd
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 2 Notice Some features of the product and its accessories described herein rely on the software installed, capacities and settings of local network, and therefore may not be activated or may be limited by local network operators or network service providers. Thus, the descriptions herein may not exactly match the product or its accessories which you purchase. Shanghai Mobiletek Communication Ltd reserves the right to change or modify any information or specifications contained in this manual without prior notice and without any liability. Copyright This document contains proprietary technical information which is the property of Shanghai Mobiletek Communication Ltd. copying of this document and giving it to others and the using or communication of the contents thereof, are forbidden without express authority. Offenders are liable to the payment of damages. All rights reserved in the event of grant of patent or the registration of a utility model or design. All specification supplied herein are subject to change without notice at any time. DISCLAIMER ALL CONTENTS OF THIS MANUAL ARE PROVIDED “AS IS”. EXCEPT AS REQUIRED BY APPLICABLE LAWS, NO WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE MADE IN RELATION TO THE ACCURACY, RELIABILITY OR CONTENTS OF THIS MANUAL. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT SHALL SHANGHAI MOBILETEK COMMUNICATION LTD BE LIABLE FOR ANY SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, OR LOSS OF PROFITS, BUSINESS, REVENUE, DATA, GOODWILL SAVINGS OR ANTICIPATED SAVINGS REGARDLESS OF WHETHER SUCH LOSSES ARE FORSEEABLE OR NOT.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 3 Version History Date Version Description of change Author 2017-06-14 V1.0 Initial
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 4 Contents 1 ABOUT THIS DOCUMENT ...................................... 7 1.1Applicable scope ....................................................................................................................................... 7 1.2 Writing purpose ....................................................................................................................................... 7 1.3 Support and reference documents list .................................................................................................... 7 1.4 Terms and Abbreviations ........................................................................................................................ 8 2 PRODUCT OVERVIEW ......................................... 9 2.1 Package Dimensions .............................................................................................................................. 10 2.2 Product Function Outline ..................................................................................................................... 11 2.2.1 Hardware Diagram ....................................................... 11 2.2.2 Radio frequency function ............................................... 12 3 INTERFACE DESCRIPTION ................................... 14 3.1 PIN Definition ...................................................................................................................................... 14 3.1.1 Pin I/O parameter definition ........................................... 14 3.1.2 Pin Map ................................................................ 14 3.1.3 PIN Definition and function description ................................ 15 3.2 Operating condition ............................................................................................................................. 20 3.3 Digital I/O characteristics ..................................................................................................................... 20 3.4 Power Interface ...................................................................................................................................... 20 3.4.1 Power supply pin description ........................................... 20 3.4.2 Power supply requirements .............................................. 21 3.4.3 Power Supply Design Guide .............................................. 22 3.4.4 Recommended Power supply circuit ....................................... 23 3.4.5 Power Supply Layout guide .............................................. 24 3.5 UIM interface ......................................................................................................................................... 24 3.5.1 Pin definition ......................................................... 24 3.5.2 Design Guide ........................................................... 25 3.5.3 UIM interface reference circuit ........................................ 25 3.6 PCM interface ........................................................................................................................................ 25 3.6.1 PCM interface definition ............................................... 25 3.6.2 PCM interface application .............................................. 27 3.7 USB2.0 interface .................................................................................................................................... 28 3.7.1 USB interface pin definition ........................................... 28 3.7.2 USB Interface application .............................................. 28 3.8 UART Interface ...................................................................................................................................... 29 3.8.1 Pin description ........................................................ 29
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 5 3.8.2 UART interface application ............................................. 30 3.9 Power on/off and reset interface ........................................................................................................... 32 3.9.1 Pin definition ......................................................... 32 3.9.2 Power on sequence ...................................................... 33 3.9.3 Power off sequence ..................................................... 33 3.9.4 Reset sequence ......................................................... 35 3.9.5 Power on/off and reset interface application ........................... 35 3.10 Interactive interface ............................................................................................................................. 36 3.10.1 Pin definition ........................................................ 36 3.10.2 interactive interface application ..................................... 37 3.11 Net Light interface ............................................................................................................................... 38 3.11.1 Pin define ............................................................ 38 3.11.2 Net light application ................................................. 38 3.12 System boot configuration and download ................................................................................... ....... 39 3.12.1 Pin definition ........................................................ 39 3.12.2 Boot configuration and force USB interface application ................ 39 3.13 Analog and Digital conversion (ADC) interface ................................................................................ 40 3.14 I2C interface ......................................................................................................................................... 40 3.14.1 I2C pin definition .................................................... 40 3.15 Antenna interface ................................................................................................................................. 41 3.15.1 RF signal PCB layout guide ............................................ 41 3.15.2 applications .......................................................... 41 4 PRODUCT CHARACTERISTICS ................................. 43 4.1 Absolute parameters .............................................................................................................................. 43 4.2 Operation condition ............................................................................................................................... 43 4.2.1 Operation voltage ...................................................... 43 4.2.2 Work mode(TBD) ......................................................... 44 4.2.3 current consumption(TBD) ............................................... 45 4.3 Working and storage temperature ....................................................................................................... 45 4.4 ESD performance .................................................................................................................................. 46 5 DESIGN GUIDELINE ........................................ 46 5.1 General design rules and requirements ............................................................................................... 46 5.2 Reference circuit .................................................................................................................................... 47 5.3 RF part design guideline ....................................................................................................................... 47 5.3.1 Early antenna design considerations ................................................................................................. 47 5.4 EMC and ESD design advice ................................................................................................................ 48 5.5 PCB Recommended land pattern ......................................................................................................... 48 5.6 Products recommended upgrade .......................................................................................................... 49 6 MANUFACTURERS ........................................... 50
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 6 6.1 Steel mesh design ................................................................................................................................... 50 6.2 Temperature curve ................................................................................................................................. 51 7 PACKAGE STORAGE INFORMATION ............................. 53 7.1 Package information .............................................................................................................................. 53 7.1.1 Tape and reel information .............................................. 53 7.1.1 Package information .................................................... 53 7.2 Bagged storage conditions ..................................................................................................................... 54
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 7 1 About this document 1.1Applicable scope This document describes the L600 series 4G LTE CAT-M1 and NB1 LCC Module (hereinafter referred to as L600), the basic specifications, product electrical characteristics, design guidance and hardware interface development guidance. Users need to follow this documentation requirements and guidance for design. This document applies only to L600 products in the application development. 1.2 Writing purpose This document provides the design and development basis for the product users. By reading this document, users can have a whole understanding of the product, the technical parameters of the product have a clear understanding, and can be used in this document to complete the development of wireless 4G Internet access functions. This hardware development document not only provides the product functional features and technical parameters, but also provides product reliability testing and related testing standards, business functions to achieve process, RF performance indicators and user circuit design guidance. 1.3 Support and reference documents list In addition to the hardware development documentation, we also provide a guide to the development board based on this product manual and software development instruction manual, 1-1 is supported as a list. Table 1-1 support document list No. Documents 1 《L600 AT Command User Guide》 2 《L600_SPEC.docx》 3 《L600 EVB User Manual》 4 《L600 Schematic checklist》 5 《L600 Layout checklist》 6 《L600_Reference Design_V1.pdf》 7 《L600_V1_DECAL.sch》
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 8 8 《L600_V1_DECAL.PCB》 1.4 Terms and Abbreviations Table 1-2 is the Document relative Terms and Abbreviations。 Table 1-2 Terms and Abbreviations Abbreviation Descriptions ESD Electro-Static discharge USB Universal Serial Bus UART Universal Asynchronous Receiver Transmitter SDCC Secure Digital Card Controller USIM Universal Subscriber Identification Module SPI Serial Peripheral Interface I2C Inter-Integrated Circuit PCM Pulse-coded Modulation I/O Input/output LED Light Emitting Diode GPIO General-purpose Input/Output GSM Global Standard for Mobile Communications GPRS General Packet Radio Service WCDMA Wideband Code Division Multi Access UMTS Universal Mobile Telecommunication System HSDPA High Speed Downlink Packet Access HSUPA High Speed Uplink Packet Access AGPS Assisted Global Positioning System BER Bit Error Rate DL Downlink COEX WLAM/LTE-ISM coexistence SMPS Switched-mode power supplies LTE Long Term Evolution FDD Frequency Division Duplexing TDD Time Division Duplexing
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 9 DPCH Dedicated Physical Channel DPCH_Ec Average energy per PN chip for DPCH. DPCH 2 Product Overview L600 is a series of LTE CAT M1 and CAT NB1 module and special design for global IOT market, and it’s have integrated rich peripheral interface. User can choose the module based on the wireless network configuration. In this document, the supported radio band is described in the following items. This product is a LCC interface of 4G wireless internet module, with the high speed, small size, light weight, high reliability can be widely used in various products and devices with wireless internet access: Table 2-1 L600 series module type correspond band Support band L600 LTE CAT M1 Full Duplex FDD FDD_LTE B1 ● FDD_LTE B3 ● Data transmission specifications  LTE-FDD - Uplink up to 375k bps, - Downlink up to 375K bps Interface  USB2.0  UART  UIM (3V/1.8V)  GPIO  ADC*2  PCM  SPI  I2C  NETLIGHT  POWER KEY  RESET Dimensions（L×W×H）:25mm×21.5mm×2.6mm
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 10 TOP VIEW BOTTOM VIEW SIDE VIEW Figure 2-1 Product Physical Map 2.1 Package Dimensions The product module is 64-PIN LCC package module. The size of L600 is extremely small, it is only 21.5.0 x 25.0 x 2.6 mm with LCC package, It is cost competitive and high integrated which make it convenient for customer to design their own application products. Pin 1 position from the bottom of the belt angle welding plate to identify, the missing corner where the direction of the corresponding module angle pad, figure 2-2 is the product dimension type map:
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 11 (a)Top Dimensions (Unit mm) (b)Side View (Unit mm)A (c)Bottom Dimensions (Unit mm) Note: BGA test pin in actual use of the customers don't need (PCB assembly, the stencil file). Figure 2-2 Module Dimensions 2.2 Product Function Outline 2.2.1 Hardware Diagram This product mainly includes the following signal group：USB Interface signal、USIM card Interface signal、I2C Interface signal、UART Interface signal、PCM Interface signal、SPI interface、Module startup、Module control signal、Power supply and ground. The global architecture of the L600 module is described in the figure below.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 12 RFTransceiverBasebandFLASHDDR19.2 MHZXOPower on/offPMICLTE CAT M1 / Nbe PAMAIN ANTGNSS IQVBATVBATLDOUART/SPISIM CARDPCMI/O STATUSVDD_RFDATARF IQCLKResetASM Figure 2-3 L600 System Functional Architecture 2.2.2 Radio frequency function RF Function Overview：  Dual -Band FULL Duplex FDD-LTE CATM1 B4/B13 The operating frequency range of the transmitter is shown in table 2-2. Table 2-3 RF frequency band Working band Upstream band（Uplink） Downlink frequency（Downlink） FDD_LTE B4 1710 MHz~1755 MHz 2110 MHz~2155 MHz FDD_LTE B13 777 MHz~787 MHz 746 MHz~ 756 MHz Table 2-4 Conducted transmission powerWorking Band Max Power Min Power FDD_LTE B4 23dBm +/-2.7dB <-40dBm FDD_LTE B13 23dBm +/-2.7dB <-40dBm Table 2-6 Reference sensitivity (QPSK)Channel bandwidth
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 13 E-UTRA Band 1.4 MHz 3 MHz 5 MHz 10 MHz 15 MHz 20 MHz Duplex Mode4 -102.2 -- -- -- -- -- FDD 13 -98.7 -- -- -- -- -- FDD
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 14 3 Interface Description 3.1 PIN Definition 3.1.1 Pin I/O parameter definition The I/O parameter definition of the product is shown in table 3-1. Table 3-1 I/O parameter definitions Pin attribute symbol Description PI Power input PIN PO Power output PIN AI Analog input AIO Analog signal input/output PIN I/O Digital signal input/output PIN DI Digital signal input DO Digital signal output DOH Digital output with high level DOL Digital output with low level PD Pull down PU Pull up AO Analog output 3.1.2 Pin Map L600 is a extremely small LCC package module and special design for the IOT marketing, and it’s have integrated rich peripheral interface. Such as SIM , USB ,PCM ,UART and interactive interface, detail description show as below chart. All hardware interfaces which connect L600 to customers’ application platform are through 64 pins pads (Metal half hole). Figure 3-1 is L600 PIN outline diagram.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 15 12#3#4678910111213141516517SPI_CSSPI_MOSISPI_MISOSPI_CLKGNDUSB_HS_DMUSB_HS_DPGNDUSB_VBUSUSB_IDGNDUIM_CLKUIM_RESETUIM_DATAUIM_PRESENTVREG_L6_UIMGND4948474544434241403938373635344633NCFLIGHTMODEWAKEUP_OUTWAKEUP_INGNDI2C_SDAI2C_SCLMB_GPIO_0GNDVREG_L11_1P8NETLIGHTNCRESET_NPHONE_ON_NADC1ADC2NCTop View Figure 3-1 Pin Map View (Top View) Note:1. # flag Pin standard this pin is a Multi-function pin and it’s integrated different function in different system status, and the detail function please refer to the correspond chapter. 3.1.3 PIN Definition and function description Table 3-2 Pin definition Pin No. Pin description Pin No. Pin description 1 SPI_CS 2 SPI_MOSI 3 SPI_MISO 4 SPI_CLK 5 GND 6 USB_HS_DM 7 USB_HS_DP 8 GND
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 16 9 USB_VBUS 10 USB_ID 11 GND 12 UIM_CLK 13 UIM_RESET 14 UIM_DATA 15 UIM_PRESENT 16 VREG_L6_UIM 17 GND 18 ANT_MAIN 19 GND 20 GND 21 NC 22 NC 23 BOOT_CONFIG_0 24 NC 25 VBAT_RF 26 VBAT_RF 27 GND 28 GND 29 VBAT_BB 30 VBAT_BB 31 GND 32 GND 33 NC 34 ADC2 35 ADC1 36 PHONE_ON_N 37 RESET_N 38 NC 39 NETLIGHT 40 VREG_L11_1P8 41 GND 42 MB_GPIO_0 43 I2C_SCL 44 I2C_SDA 45 GND 46 WAKEUP_IN 47 WAKEUP_OUT 48 FLIGHTMODE 49 NC 50 GND 51 UART_RTS_N 52 UART_CTS_N 53 UART_RX 54 UART_TX 55 UART_RI 56 UART_DCD 57 UART_DTR 58 FORCE_USB_BOOT 59 STATUS 60 GND 61 PCM_OUT 62 PCM_IN 63 PCM_SYNC 64 PCM_CLK
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 17 Table 3-3 Pin Function Description Power interface Pin Name Pin No. I/O Description Content VBAT_BB 29,30 PI Power supply voltage,VBAT=3.4V~4.2V. The power supply for system Maximum load current must above 2A. Keep de-cap capacitor close to the this Net. VBAT_RF 25,26 PI Power supply voltage,VBAT=3.4V~4.2V. VREG_L6_UIM 16 PO Module LDO output power, dual-voltageoutput, Max current 300mA. Only use for external SIM Card VDD. VREG_L11_1P8 40 PO Module LDO output power for MCP and accessories If not use please let it open or add a 10 uF de-cap capacitor to ground. GND 5,8,11,17,19,20,27,28,31,32,41,45,50,60 -- Ground. System control interface Pin Name Pin No. I/O Description Content PHONE_ON_N 36 DI System power on/off input, active low. RESET_N 37 DI System reset input, active low. FLIGHTMODE 48 DI, PU The input signal, used to control the system into flight mode, L: flight mode; H: normal mode Pull UP to VDD_1V8（PIN 40） with 10K resistor Interactive interface Pin Name Pin No. I/O Description Content NETLIGHT 51 DO Identify the system network status. STATUS 40 DO Module status identify: High level power on, low level
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 18 power off. WAKEUP_IN 46 DI AP weak up module WAKEUP_OUT 47 DO Module wake up AP SIM interface Pin Name Pin No. I/O Description Content UIM_PRESENT 15 DI，PU Input pin as USIM carddetect pin. H: UIM is removed L: UIM is inserted If not use keep it open. UIM_DATA 14 I/O USIM Card data I/O, which has been pulled up with a 10KR resistor to UIM_VDD in module. Do not pull up or pull down in users’ application circuit. All signals of USIM interface should be protected with ESD/EMC. UIM_RESET 13 DO UIM Reset UIM_CLK 12 DO UIM Clock UIM_VDD 16 PO UIM Card Power output, output Voltage depends on UIM mode automatically， and one is 3.0V±10%, another is 1.8V±10%. Current is less than 50mA. PCM interface Pin Name Pin No. I/O Description Content PCM_CLK 64 DO PCM data bit clock. If not use keep it open. PCM_SYNC 63 DO PCM data frame sync signal. PCM_IN 62 DI PCM data input. PCM_OUT 61 DO PCM data output. FULL UART Pin Name Pin No. I/O Description Content RTS 51 DI DET Request to send. If not use keep it open.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 19 CTS 52 DO Clear to Send. If not use keep it open. RX 53 DI Receive Data. If not use keep it open. RI 55 DO Ring Indicator. If not use keep it open. DCD 56 DO Carrier detects. If not use keep it open TX 54 DO Transmit Data. If not use keep it open. DTR 57 DI DTE get ready. If not use keep it open. I2C interface Pin Name Pin No. I/O Description Content I2C_SCL 43 DO I2C clock output. If not use keep it open. I2C_SDA 44 I/O I2C data input/output.RF port Pin Name Pin No. I/O Description Content MAIN _ANT 18 AIO Main Antenna Others Pin Name Pin No. I/O Description Content ADC1 35 AI Analog conversion digital input interface1 If not use keep it open. ADC2 34 AI Analog conversion digital input interface2 FORCE_USB_BOOT 58 I/O Pull up to 1.8V (L600VDD_1V8) with 10K resistor force module in USB download mode Recommend placing test points for debug. BOOT_CFG0 23 DI, PD Pull up to 1.8V (L600VDD_1V8) with 10K resistor force module in fastboot mode
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 20 3.2 Operating condition Table 3-4 module recommended operating condition Parameter Description Min. Typ. Max. Unit VBAT Main power supply for the module 3.4 3.8 4.2 V 3.3 Digital I/O characteristics Table 3-5 1.8V Digital I/O characteristics Parameter Description Min. Typ. Max. Unit VIH High level input voltage 0.7*VDD_PX VDD_PX VDD_PX+0.3 V VIL Low level input voltage -0.3 0 0.2* VDD_PX V VOH High level output voltage VDD_PX-0.45 - VDD_PX V VOL Low level output voltage 0 0 0.45 V IOH High-level output current (no pull down resistor) - 2 - mA IOL Low-level output current (no pull up resistor) - -2 - mA IIH Input high leakage current (no pull down resistor) - - 1 uA IIL Input low leakage current (no pull up resistor) -1 - - uA *Note: 1. These parameters are for digital interface pins, such as SPI, I2C,GPIOs UART, PCM, BOOT_CFGn. 2. L600 USIM card signal (USIM_CLK, USIM_DATA, USIM_RST) support dual-voltage (1.8V and 3.0V) mode, and the DC character show in corresponding function block. 3.4 Power Interface 3.4.1 Power supply pin description Table 3-6 DC Power Characteristics
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 21 Pin No. Net Name Description DC Characteristic（V） Min. Typ. Max. 25,26 VBAT_RF Power supply for the module RF 3.4 3.8 4.2 29,30 VBAT_BB Power supply for the module RF 3.4 3.8 4.2 5,8,11,17,19,20,27,28,31,32,41,45,50,60 GND GND - - - 3.4.2 Power supply requirements There are four VBAT PIN power for the module, VBAT directly power supply for the module baseband and PA, and operating rating is 3.4V~4.2V; In the weak network environment, the antenna will be maximum power emission. The peak current of the module under the 2G mode may reach the peak current of 1.8A. power supply to reach 2A, the average current to reach 0.9A above. Due to the launch of GSM/GPRS time slot pulse can cause VBAT power source instantaneous voltage drop, maximum peak current can reach 2A, So the max power supply current must more than 2 A. Figure 3-2 sign for GSM/GPRS instantaneous pulse diagram. Figure 3-2 GSM/GPRS instantaneous pulse Table 3-7 VBAT power supply interface characteristics Symbol Description Min Typ Max Unit VBAT Power supply voltage 3.4 3.8 4.2 V IVBAT(peak) Power supply p current - 2* - A IVBAT(average) Power supply 1 1.5 - A
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 22 average current IVBAT(power-off) Power supply current in power off mode - - 20 uA IVBAT(power-save) Power supply current in power save mode(sleep mode) - - 3 mA 3.4.3 Power Supply Design Guide Make sure that the input voltage at the VBAT pin will never drop below 3.4V even during a transmit burst when the current consumption rises up to more than 2A. If the power voltage drops below 3.4V, the RF performance of module may be affected. Using large tantalum capacitors (above 300uF) will be the best way to reduce the voltage drops. If the power current cannot support up to 2A, users must introduce larger capacitor (typical 1000uF) to storage electric power. For the consideration of RF performance and system stability, some multi-layer ceramic chip (MLCC) capacitors (0.1/1uF) need to be used for EMC because of their low ESR in high frequencies. Note that capacitors should be put beside VBAT pins as close as possible. Also User should keep VBAT net wider than 2 mm to minimize PCB trace impedance on circuit board. The following figure is the recommended circuit. Figure 3-3 VBAT input application circuit Note: The Cd, Ce, Cb, Cc and Cf are recommended being mounted for L600, but the Ca, Cb, Ce, Cc and Cf for tune.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 23 In addition, in order to get a stable power source, it is suggested to use a Zener diode of which reverse Zener voltage is 5.1V and dissipation power is more than 500mW. Table 3-8: Recommended Zener diode models NO. Manufacturer Part Number Power Package 1 On semi MMSZ5231BT1G 500mW SOD123 2 Prisemi PZ3D4V2H 500mW SOD123 3 Vishay MMSZ4689-V 500mW SOD123 4 Crownpo CDZ55C5V1SM 500mW 0805 3.4.4 Recommended Power supply circuit If the voltage difference is not big,We recommend DCDC or LDO is used for the power supply of the module, make sure that the peak current of power components can rise up to more than 2A. The following figure is the reference design of +5V input linear regulator power supply. The designed output for the power supply is 3.8V. Figure 3-4 Reference circuit of the LDO power supply If there is a big difference between the input voltage and the desired output (VBAT) or better efficiency is more important, a switching converter power supply will be preferable. The following figure is the reference circuit. Figure 3-5 Reference circuit of the DCDC power supply Note: DCDC may deprave RF performance because of ripple current intrinsically.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 24 3.4.5 Power Supply Layout guide The layout of the power supply section and the related components is of vital importance in the power module design. If processes this part layout is not good, will lead to various effects, such as bad EMC, effective the emission spectrum and receiving sensitivity, etc. So the power supply part design is very important, when you design this part you should notes below contents: 1. DC DC switch power should place away from the antenna and other sensitivity circuit; 2. Consider the voltage drop and the module current requirement, the layout line should better above 100mil. If conditions allow should add a power shape plane. 3.5 UIM interface 3.5.1 Pin definition The L600 integrated a ISO 7816-2 standard USIM port, and the module can automatic identify the voltage demo according the USIM to allow the mobile equipment to attach to the network. Both 1.8V and 3.0V SIM Cards are supported. Table 3-9 UIM Electronic characteristic in 1.8V mode (USIM_VDD =1.8V) Symbol Parameter Min. Typ. Max. Unit UIM_VDD LDO power output 1.75 1.8 1.95 V VIH High-level input voltage 0.65·UIM_VDD - UIM_VDD +0.3 V VIL Low-level input voltage -0.3 0 0.35·UIM_VDD V VOH High-level output voltage UIM_VDD -0.45 -- UIM_VDD V VOL Low-level output voltage 0 0 0.45 V Table 3-10: USIM Electronic characteristic 3.0V mode (USIM_VDD =3.0V) Symbol Parameter Min. Typ. Max. Unit UIM_VDD LDO power output 2.75 3.0 3.05 V VIH High-level input voltage 0.65*UIM_VDD - UIM_VDD +0.3 V VIL Low-level input voltage -0.3 0 0.25·UIM_VDD V VOH High-level output voltage UIM_VDD -0.45 - UIM_VDD V VOL Low-level output voltage 0 0 0.45 V
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 25 3.5.2 Design Guide UIM electronic characteristics as the table 3-9,3-10 show. In order to meet the 3 GPP TS 51.010 1 protocol and EMC certification requirements. Suggest UIM slot near the location of the module USIM card interface, to avoid running for too long, lead to serious deformation of waveform and effect signal integrity, UIM_CLK and UIM_DATA signal lines suggest ground protect. Between the UIM VCC & GND add a 1uF and a 33 pF capacitor in parallel, Between the SIM_CLK& GND, UIM_RST& GND, UIM DATA& GND add a 33 pF capacitor in parallel, for filter the RF signal interference. 3.5.3 UIM interface reference circuit Figure 3-6 UIM Reference circuit Note:1. UIM_DATA have added the pull-up resistance in the module design. 2. L600 support hot-plug detect, if need the function, please add this pin. 3.6 PCM interface 3.6.1 PCM interface definition L600 provides hardware PCM interface for external codec. L600 PCM interface can be used in short sync master mode only, and only supports 16 bits linear format：
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 26 Table 3-11 PCM interface definition Pin No. Signal name I/O Type DC Characteristics（V） Min. Typ. Max. 63 PCM_SYNC PCM synchronizing signal -0.3 1.8 1.9 62 PCM_DIN PCM data input -0.3 1.8 1.9 61 PCM_DOUT PCM Data output -0.3 1.8 1.9 64 PCM_CLK PCM Data clock -0.3 1.8 1.9 Figure 3-7 PCM_SYNC timing Figure 3-8 Codec to L600 module timing Figure 3-9 L600 to codec module timing
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 27 Table 3-12 PCM interface Timing Parameter Descriptions DC characters Min. Typ. Max. Unit T(sync) PCM_SYNC cycle - 125 - us T(synch) PCM_SYNC high level hold time - 488 - ns T(syncl) PCM_SYNC low level hold time - 124.5 - us T(clk) PCM_CLK cycle - 488 - ns T(clkh) PCM_CLK high level hold time - 244 - ns T(clkl) PCM_CLK low level hold time - 244 - ns T(susync) PCM_SYNC establish time - 122 - ns T(hsync) PCM_SYNC hold time - 366 - ns T(sudin) PCM_IN establish time 60 - - ns T(hdin) PCM_IN hold time 60 - - ns T(pdout) From PCM_CLK rising edge to PCM_OUT valid time - - 60 ns T(zdout) From PCM_CLK falling edge to PCM_OUT high impendence delay time - - 60 ns 3.6.2 PCM interface application L600 only support the host mode, PCM_SYNC,PCM_CLK is the output pin，PCM_SYN as the synchronizing output 8kHz sync signal. PCM Data support 8bit or 16bit data.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 28 Figure 3-10 PCM application circuit（L600 in host mode） Note:1. L600 PCM port DC character is base on 1.8 voltage, please pay attention the voltage matching. 2. If your design need this function, you should add the crystal for PCM clock. About the crystal type please contact our market. 3. L600 default design base on NAU8814 as the codec chip, the detail design please refer to 《L600 reference design》. 3.7 USB2.0 interface 3.7.1 USB interface pin definition L600 integrated a USB 2.0 port and low speed mode full speed mode and high speed mode transmission speed between the AP and the host. Below table is the module USB pin definition Table 3-13 USB interface pin definition Pin No. Signal name I/O type DC characteristic（V） Min. Typ. Max. 12 USB_DM USB2.0 date D- - - - 13 USB_DP USB2.0 data D+ - - - 3.7.2 USB Interface application USB bus is mainly used for data transmission, software upgrading, module testing. Work in the high-speed mode of the USB line, if you need ESD design, ESD protection device must meet the junction capacitance value <5pf, otherwise the larger junction capacitance will cause waveform distortion, the impact of bus communication. Differential impedance of differential data line in 90ohm + 10%. In your application must add a 47Kohm resistor between USB_VBUS to ground.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 29 Figure 3-11 USB application 3.8 UART Interface 3.8.1 Pin description L600 module provides a flexible 7-wire UART (universal asynchronous serial transmission) interface. UART as a full asynchronous communication interface, Support the standard modem handshake signal control, Comply with the RS - 232 interface protocols. And also support four wire serial bus interface or the 2-wire serial bus interface mode, and the module can be through the UART interface for serial communication with the outside (DET) and the AT command input, etc. L600 module is a DCE (Data Communication Equipment) and client PC is a DTE (Data Terminal Equipment).AT commands are entered and serial communication is performed through UART interface. The pin signal is defined as shown in below table. Table 3-14 UART pin definition Pin No. Pin I/O type Descriptions 54 UART_TX DO UART data transmission 53 UART_RX DI UART data receive 55 UART_RI DO Ring Indicator. 51 UART_RTS DO UART DET request to send 57 UART_DTR DI DTE get ready. 52 UART_CTS DI UART Clear to Send. 56 UART_DCD DO UART Carrier detects.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 30 Note：UART_RI, UART_DTR can be used as two line UART interface for system debugging, See table 3-3 Pin functional description. 3.8.2 UART interface application UART_RI, UART_DTR default status is the system log port, so we recommend that users keep reserved the interface and test points in design. The L600 UART is 1.8V interface. A level shifter should be used if user’s application is equipped with a 3.3V UART interface. The level shifter TXB0108RGYR provided by Texas Instruments is recommended. The reference design of the TXB0108RGYR is in the following figures. About the application as below: Figure 3-12 UART 4 Line connection mode
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 31 TXD1RXD1RTS1CTS1DTR1DCD1RING1TXDRXDRTSCTSDTRDCDRINGSerial Port Serial PortL600(DCE) Client (DTE)GND GND Figure 3-13 UART 2 Line connection mode Figure 3-14 UART Full mode L600 UART is COMS 1.8V level, if the AP voltage level is not the 1.8V should add a voltage transfer module in your application. Below is SP3238E application diagram.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 32 Figures 3-16 Voltage transfer Reference Circuit 3.9 Power on/off and reset interface 3.9.1 Pin definition L600 can be powered on by pulling PWRKEY pin down to ground. This pin is already internal pulled up to 1.8V in module, so external pull-up resistor is not necessary. Placing a100nF capacitor and an ESD protection diode close to the PWRKEY pin is strongly recommended. Please refer to the following figure for recommended reference circuitL600 also have a RESET pin to reset module. This function is used as an emergency reset only when AT command “AT+CPOF” and the PWRKEY pin has no effect. User can pull RESET pin to ground, then module will reset. This pin is already pulled up with a 40KΩ resistor to 1.8V in module, so external pull-up resistor is not necessary. Placing a100nF capacitor and an ESD protection diode close to the RESET pin is strongly recommended. Please refer to the following figure for recommended reference circuit, you can pull-down this pin to ground and hold about 200 MS and then release will force the module enter reset state. Table 3-15 power on/off and reset key define Pin No. Net name I/O Typ. descriptions 36 PHONE_ON_N(PWRKEY) DI L600 power on/off pin (internal pull-up to 1.8V) 37 RESET_N DI L600 RESET pin (internal pull-up to 1.8V)
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 33 3.9.2 Power on sequence Table 3-16 power on timing chart. Ton Power on low level pulse 100 500 -- ms Ton(status) Power on time (According to the STATUS pin judgment) 15 -- 25 s Ton(uart) Power on time (according the UART pin judgement) 10 -- 20 s VIH Input high level voltage of PWRKEY pin 1.17 1.8 2.1 V VIL Input low level voltage of PWRKEY pin -0.3 0 0.3 V Figures 3-17 Power on Timing sequence Note: the STATUS pin can be used to identify whether has been power on, when the module has access to electricity and initialization is completed, the STATUS output high level, or has maintained low level. 3.9.3 Power off sequence The following methods can be used to power down. These procedures will make module disconnect from the network and allow the software to enter a safe state, and then save data before completely powering the module off. ● Method 1: Power off L600 by pulling the PWRKEY pin down ● Method 2: Power off L600 by AT command “AT+CPOF”
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 34 ● Method 3: over-voltage or under-voltage automatic power down. ● Method 4: over-temperature or under-temperature automatic power down. Note: 1. About the AT command “AT+CPOF” detail please refer document [1]. 2. Over-voltage or under-voltage may cause automatic power down. 3. Over-temperature or under-temperature may cause automatic power down. Table 3-17 Power off timing chart. Toff The time of active low level pulse on PWRKEY pin to power off module 2.5 -- -- s Toff(status) The time from power-off issue to STATUS pin output low level(indicating power off) 6 -- -- s Toff(uart) The time from power-off issue to UART port off 6 -- -- s Toff-on The buffer time from power-off issue to power-on issue 0 -- -- V VIH Input high level voltage of PWRKEY pin 1.17 1.8 2.1 V VIL Input low level voltage of PWRKEY pin -0.3 0 0.3 V User can power off the L600 by pulling PWRKEY down to ground for a specific time. The power off scenario is illustrated in the following figure. Figures 3-18 Power off Timing sequence Note: the STATUS pin can be used to identify whether has been power on, when the module has access to electricity and initialization is completed, the STATUS output high level, or has maintained low level.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 35 3.9.4 Reset sequence L600 can lower module RESET pin to restart the module. Table 3-18 Reset pin electrical properties Symbol Net name Min. Typ. Max. Unit Treset Reset pin low level hold time 50 100 500 ms VIH Reset pin input high level 1.17 1.8 2.1 V VIL Reset pin input low level -0.3 0 0.3 V Note: it is recommended that only in an emergency, such as module without response, use the RESET pin. In addition, under the module power off status the RESET pin is invalid. 3.9.5 Power on/off and reset interface application Figure 3-19: Reference power on/off reset circuit Another way to control the PWRKEY pin is directly using a push button switch. Need to set a button near the TVS to ESD protection. The image below for reference circuit:
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 36 Figure 3-20: power on/off and reset recommended circuit (physical buttons) 3.10 Interactive interface 3.10.1 Pin definition Table 3-19 list the interface is mainly with the application processor interactive interface, including query, wake up four types, status indication, flight mode interface. Table 3-19 Interactive interface Pin No. Signal I/O type Descriptions 46 GPIO_2/WAKEUP_IN DI Default: GPIO Optional: Input pin as wake up interruptsignal to module from host. 47 GPIO_1/WAKEUP_OUT Default: GPIO Optional: Output pin as the module wake up the AP 59 STATUS DO AP inquire the module status 48 FLGHTMODE DI Pull up to 1.8V made the system enter in flight mode, at this mode will tune off all the wireless function 42 GPIO_0 DO General GPIO module output (used for keyboard backlighting, etc.) 28 GPIO_3 I/O GPIO
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 37 3.10.2 interactive interface application L600 provides three shook hands with application processor communication signals. Application processor can query whether the module boot normal work through STATUS. Through the WAKEUP_OUT query module is in sleep mode, and sleep in the module, through WAKEUP_IN wake module. Similarly, when application processor in the sleep state, the L600 modules can through WAKEUP_OUT wake application processor.  STATUS：Module sleep instructions, high level indicator to sleep, low level instructions for the awakened state;  WAKEUP_IN： The host can lower the signal awakens the module，If, low level has maintained, module can't sleep.  WAKEUP_OUT: when L600 need to communicate with the AP, module can be set this pin for low level to awaken application processor.  FLGHTMODE：Through the external output high level module into flight mode; FLIGHTMODE pin can be used to control module to enter or exit the flight mode. In flight mode, L600 internal radio frequency circuit is closed. FLIGHTMODE reference circuit as shown in the figure below: Figure 3-21: Flight mode recommended circuit (physical buttons)
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 38 3.11 Net Light interface 3.11.1 Pin define Table 3-20 LED pin definitions Pin No. Net name I/O type description 39 NETLIGHT DO Module net state identify control LED port 3.11.2 Net light application The L600 module has 1 pins for controlling the LED display, which can be used as an indicator of network connection status. Different network states are represented by the mode of the flashing light. This pin is an GPIO，with An external NPN Transistor，External connect VBAT can directly drive LED. Drive current capacity varies according to external NPN model，recommend use DTC143ZEBTL，Drive current biggest can reach 100 mA, below is the reference circuit. L600LEDR2R1 Figure 3-22 Status indicator reference circuit Note: R1, R2 value according to the voltage VLED and LED working current. Table 3-21 NETLIGHT status Net Status Module working status Always on Searching Network/Call Connect 200ms ON, 200ms OFF Data Transmit 800ms ON, 800ms OFF Registered network OFF Power off / Sleep Note: NETLIGHT output low level as “ON”, and high level as “OFF”.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 39 3.12 System boot configuration and download 3.12.1 Pin definition L600 can configure BOOT_CONFIG (Boot Configuration) pin to Configuration module power-on mode and the forced entry USB download mode. Table 3-23 Boot configuration and force USB download Pin No. Net name Function description note 23 BOOT_CFG0 Pull up this pin change boot configuration register value 58 GPIO(System on) FOCE_USB_BOOT (before system on) Pull up this pin change boot configuration register value Multiplex pin 3.12.2 Boot configuration and force USB interface application Figure 3-25 boot configuration and force USB download recommended circuit
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 40 3.13 Analog and Digital conversion (ADC) interface L600 integrated two analog-to-digital conversion interface, specific parameters are as follows: Table 3-25 ADC1, ADC2 characters characters Min. Typ. Max. Unit ADC resolution -- 15 -- Bits Transfer time -- 442 -- ms Input voltage range 0.3 -- VBAT V Input resistance 1 -- -- MΩ Note: 1. use "AT + CADC" and "AT + CADC2" can read ADC1 and ADC2 voltage on the pin. More information please refer to the document [1]. 2. The need for special software version to support access to the ADC. 3.14 I2C interface 3.14.1 I2C pin definition I2C is used to communicate with peripheral equipment and can be operated as either a transmitter or receiver, depending on the device function. Both SDA and SCL are bidirectional lines connected with I2C interface. Its operation voltage is 1.8V. High speed mode transmission rate can reach 400 KBPS, Because L600 haven’t internal pulled up to the I2C interface, so in your design need pull up. Below figure is the reference design: Figure 3-28 I2C reference design Note: 1. L600 I2C only support host mode. 2. Only special software version support inquire the I2C.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 41 3.15 Antenna interface 3.15.1 RF signal PCB layout guide L600 provides RF antenna interface. Customer’s antenna should be located in the host board and connected to module’s antenna pad through micro-strip line or other types of RF trace and the trace impedance must be controlled in 50Ω. we recommends that the total insertion loss between the antenna pad and antenna should meet the following requirements: ● LTE (F<1GHz) <0.5dB ● LTE (1GHz<F<2GHz) <0.9dB ● LTE (2GHz<F) <1.2dB To facilitate the antenna tuning and certification test, a RF connector and an antenna matching circuit should be added. The following figure is the recommended circuit. The antenna feed point is defined as shown in below table： Table 3-26 antenna pin definition Pin No. Signal I/O Typ. Description 18 MAIN_ANT AI/AO Module main antenna 3.15.2 applications For convenience of antenna tuning and certification test, should increase RF connectors and the antenna matching circuit, below is a recommended circuit: Figure 3-29 Main antenna matching circuit diagram（MAIN_ANT） In this figure, the components R1, C1, C2 and R2 is used for antenna matching, the value of components can only be got after the antenna tuning, usually, they are provided by antenna vendor. By
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 42 default, the R1, R2 are 0 Ohm resistors, and the C1, C2 are reserved for tuning. The RF test connector in the figure is used for the conducted RF performance test, and should be placed as close as to the module’s antenna pin. The traces impedance between components must be controlled in 50ohm. Antenna Layout guideline In layout design, antenna RF transmission line must ensure the characteristic impedance = 50 ohm. The characteristic impedance depend on substrate board, line width and the distance from the ground plane. As shown in figure 3-20 is the layout of antenna feed point of reference for clearance area. Figure 3-33 antenna feed point
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 43 4 Product characteristics 4.1 Absolute parameters The following table shows the state of the absolute maximum work in abnormal situation. Exceed the limit value will likely result in permanent damage to the module. Table 4-1 L600 absolute parameters Parameter Min. Max. Unit VBAT absolute voltage parameter -0.5 6.0 V USB_VBUS absolute voltage parameter -0.5 5.25 V I/O absolute voltage parameter： PWRKEY, RESET, SPI, GPIO, I2C, PCM, UART,SD1_DET,USIM_DET -0.3 2.1 V I/O absolute voltage parameter： SD and USIM -0.3 3.05 V 4.2 Operation condition 4.2.1 Operation voltage This product is a DC input voltage range of 3.4 V to 4.2 V, the typical value of 3.8 V, as shown in below table. Table 4-2 Input DC voltage Parameter Min. Typ. Max. Unit VBAT Voltage 3.4 3.8 4.2 V USB_VBUS Votage 2.0 5.0 5.25 V
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 44 About L600 dc electric property, please refer to part 3.3 digital I/O characteristics. 4.2.2 Work mode(TBD) Table 4-3 work mode Mode Description Normal operation mode (LTE)Sleep In this case, the current consumption of module will be reduced to the minimal level. In sleep mode, the module can still receive paging message and SMS. (LTE) Idle Software is active. Module is registered to the GSM/WCDMA/TD-SCDMA/EVDO/LTE network, and the module is ready to communicate. (LTE) taking Connection between two subscribers is in progress. In this case, the power consumption depends on network settings such as DTX off/on, FR/EFR/HR, hopping sequences, antenna. (LTE) Standby Module is ready for GPRS/EDGE/WCDMA/TD-SCDMA/EVDO/LTE data transfer, but no data is currently sent or received. In this case, power consumption depends on network settings and EDGE/HSPA+ /LTE configuration. (LTE) Data transfer There is GPRS/EDGE/WCDMA/TD-SCDMA/EVDO/LTE data transfer in progress. In this case, power consumption is related to network settings (e.g. power control level); uplink/downlink data rates and GPRS configuration (e.g. used multi-slot settings). Minimum mode AT command “AT+CFUN” can be used to set the module to a minimum functionality mode without removing the power supply. In this mode, the RF part of the module will not work or the USIM card will not be accessible, or both RF part and USIM card will be closed, and the serial port is still accessible. The power consumption in this mode is lower than normal mode. Flight mode Use the "AT + CFUN = 7" command or lower FLIGHTMODE pins, the module can be configured to flight mode under without removing the power supply condition. In this case, the RF part does not work, but still can use the serial port and USB, the power consumption is lower than normal working mode.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 45 Power off Through the "AT + CPOF" command or lower PWRKEY pin can power off L600. At this mode, the module of internal power supply will be closed, and the system is stop running also. The UART and USB are unavailable. Sleep mode In sleep mode, the module power consumption to a minimum, but the module is still able to receive paging information and SMS. 4.2.3 current consumption(TBD) The power consumption in suspended mode and without USB connection is listed in the table below. Table 4-4 working current consumption (VBAT=3.8V) GNSS (Without USB) （AT+CFUN=0） @ -140dBm，Positioning, Typical：72mA Power off Power off current 20uA LTE Sleep/Idle LTE supply current （GNSS off，without USB） Sleep mode typical：3.8mA Idle mode typical：TBD LTE Talking FDD B4 @power 24dBm typical：450mA FDD B13 @power 24dBm typical：450mA LTE Data transmission LTE-FDD B4 @1.4Mbps typical：450mA LTE-FDD B13 @1.4Mbps typical：450mA 4.3 Working and storage temperature The operating temperature and storage temperature of L600 is listed in the following table. Table 4-5 Operating temperature Parameter Min. Typ. Max. Unit Normal operation temperature -30 25 80 ℃ Extended operation -40 25 85 ℃
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 46 temperature* Storage temperature -45 25 90 ℃ *Note: Module is able to make and receive voice calls, data calls, SMS and make GPRS/WCDMA/HSPA+/LTE traffic in -40℃ ~ +85℃. Temperatures outside of the range -30℃ ~ +80℃ might slightly deviate from ETSI specifications. 4.4 ESD performance L600 is electrostatic sensitive device, therefore, the user in the production, assembly and operation of the module must pay attention to the electrostatic protection. L600 ESD performance parameters in the following table: Table 4-6 ESD performance parameters (temperature 25 ℃, humidity: 45%) Net contact air VBAT GND ±5KV ±10KV Antenna port ±4KV ±8KV UART ±2KV ±4KV USB ±3KV ±6KV Other PADS ±2KV ±4KV 5 Design guideline This chapter provides a general design of the products instruction, the user can refer to design guidance for design, make products to achieve better performance. 5.1 General design rules and requirements Users in the design of this product is peripheral circuit, the first to ensure the external power supply circuit can provide enough power supply capacity, And the requirements for high speed signal lines USB control 90 ohm + / - 10% difference impedance. For general signal interface, require the user to us in strict accordance with the requirements of design, in line with the interface signal level matching, in case the level of damage to the module. This product its own radio frequency index is good, customers need to design in accordance with the requirements the mainboard side antenna circuit and corresponding impedance control, otherwise it will affect the whole RF index.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 47 5.2 Reference circuit Request system board VPH_PWR side power supply ability of power supply to achieve more than 2 A, meet the demand of modules, peak current, and the system side the power of the average current will reach more than 0.9 A. System board side power supply cord shall ensure enough line width, and wants to form a good return with the ground plane, moreover should increase in the power supply circuit design the method of micro level energy storage capacitor, guarantee the instantaneous power supply capacity, and the power supply ripple control within the 100 mv, the specific function of each functional module can be found in the corresponding description, overall reference circuit design please refer《L600 reference design》. 5.3 RF part design guideline 5.3.1 Early antenna design considerations  Pre-project evaluation The selection of the antenna position must first ensure that the antenna and the base station are kept in the horizontal direction, this produces the highest efficiency; Secondly, try to avoid placing the switch in the power supply or data line, chip and other devices or chips that produce electromagnetic interference. At the same time, the position of the hand can be avoided, so as to prevent the human body to produce attenuation; But also to reduce the radiation and the structure of the realization of the need to take into account. So, At the beginning of the design need to structure, ID, circuit, antenna engineers together to evaluate the layout.  Antenna matching circuit
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 48 If the module's radio frequency port and the antenna interface need to be transferred, the main board circuit design, The design of microstrip line or strip line between the module RF test base and the antenna interface between the microstrip line or the strip line by characteristic impedance 50 ohm, at the same time, reserved double L type matching circuit; If the antenna's RF connector can be directly stuck in the module's RF test base, can save the module of the RF port and the antenna interface between the transfer. 5.4 EMC and ESD design advice Users should take full account of the EMC problem caused by signal integrity and power integrity in the design of the whole machine, In the module of the peripheral circuit layout, for power and signal lines, etc., to maintain the spacing of 2 times line width. Can effectively reduce the coupling between the signal, so that the signal has a clean, the return path. When the peripheral power supply circuit is designed, the decoupling capacitor should be placed close to the module power supply pin, High frequency high speed circuit and sensitive circuit should be far from the edge of PCB, and the layout of the layout as far as possible to reduce the interference between each other, and the sensitive signal is protected. The circuit or device that may interfere with the operation of the system board is designed. This product is embedded in the system board side, design, need to pay attention to the ESD protection, the key input and output signal interface, such as (U) SIM card interface need to be placed close to the protection of ESD devices. In addition to the motherboard side, the user is required to design the structure and PCB layout, ensure that the metal shield is fully grounded, and set up an unobstructed discharge passage for the electrostatic discharge. 5.5 PCB Recommended land pattern We recommend that users in the design of main board PCB DEF，In the middle of the 12 geothermal solder design according to size in below figure. Recommended at 87 of peripheral signal pads to the module with a length of 1.0 mm. Recommended PCB pads as shown in below.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 49 Figure 5-1 RECOMMENDED LAND PATTERN (Unit: mm) 5.6 Products recommended upgrade L600 default through the USB firmware updates, so products to facilitate the software update, when the design proposal to set aside the USB test points or interface to facilitate subsequent product of the firmware upgrade.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 50 6 Manufacturers 6.1 Steel mesh design  At the bottom of the module pad thermal, can be reduced by way of steel mesh openings, reduce the risk of short circuit between the thermal and the module of the module Pin, have certain effect;  Module pad thermal welded steel mesh openings are recommended for reference. Figure 6-1 is recommended for steel mesh and size. Figure 6-11 Steel mesh (unit mm)(detail A)
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 51 Note: The direction mark point only for identify the pin 1 position, should not embody in the steel mesh file. 6.2 Temperature curve The temperature curve of the welding quality and material status influence, please pay special attention. Temperature rise speed should not be too fast, from room temperature to 150, the temperature rise rate is less than 3s. At the same time in more than 217 degrees, please try to keep time no more than 70 seconds, at intermediate values of 55 seconds is appropriate. The thermal shock strength is too general will lead to part of the device failure, resulting in a decline in yield and maintenance difficulty. And please control the maximum temperature of no more than 245 degrees, partial material, such as crystal at high temperature easy to occur the package rupture, cause unable to play the problem, and then affect the function of the product, The temperature can be set using the curve shown in table 6-1. Table 6-1 Temperature curve Lead-free process temperature curve Stage Temperature time Preheat Temperature rise from room temperature to 150 rate of temperature rising <3 / ℃ s keep warm 150℃~200℃ 40~110 s Welding < 217℃ 40~70 s < 230℃ 15~45 s Peak temperature MAX：245℃ MIN：230℃
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 52 Figure 6-3 The reference temperature curve
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 53 7 Package Storage information 7.1 Package information 7.1.1 Tape and reel information Figure 7-1 Tape and reel information 7.1.1 Package information L600 packing diagram is as follows, every 4 volumes of material packed in a case between each volume of material has a bubble mat do isolation protection. Specific as shown in the figure below:
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 54 Figure 7-2 Package and ship information 7.2 Bagged storage conditions L600 shipments in the form of vacuum sealing anti-static bag. Module of storage need to follow the following conditions: Environment below 40 Degrees Celsius temperature, air humidity is less than 90% of cases, the module can be in vacuum sealed bags for 12 months. Conditions set the storage environment Suggestions with reference to the following form. Table 7-1 Storage conditions (less than 90% humidity of the air vacuum sealed packaging) Parameter Min. Typ. Max. Unit Storage temperature -45 25 90 ℃ When on the vacuum bags, if meet the following conditions, the module can be directly for reflow soldering (furnace temperature setting reference 6.2 furnace temperature curve) or other high temperature process:  Module temperature below 30 degrees c, the air humidity is less than 60%, factory within 72 hours to complete the SMT.  The humidity is less than 10%. If the module is in the following conditions, to be baked before SMT:  When the environment temperature is 23 degrees Celsius (allow upper and lower volatility of 5 degrees Celsius), humidity index greater than 10%.  When open vacuum bags, module temperature below 30 degrees Celsius, air humidity is less than 60%, but the factory have not finished the SMT within 72 hours.
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 55  When open the vacuum bags, module storage air humidity is more than 10%. If modules need baking, please under 125 degrees Celsius (allowing fluctuations of 5 degrees Celsius) up and down bake for 48 hours. FCC Certification Requirements. According to the definition of mobile and fixed device is described in Part 2.1091(b), this device is a mobile device. And the following conditions must be met: 1. This Modular Approval is limited to OEM installation for mobile and fixed applications only. The antenna installation and operating configurations of this transmitter, including any applicable source-based time- averaging duty factor, antenna gain and cable loss must satisfy MPE categorical Exclusion Requirements of 2.1091. 2. The EUT is a mobile device; maintain at least a 20 cm separation between the EUT and the user’s body and must not transmit simultaneously with any other antenna or transmitter. 3.A label with the following statements must be attached to the host end product: This device contains FCC ID: 2AK9DL600. 4.To comply with FCC regulations limiting both maximum RF output power and human exposure to RF radiation, maximum antenna gain (including cable loss) must not exceed: ❒LTE band 4 <3dBi ❒LTE band 13 <3dBi 5. This module must not transmit simultaneously with any other antenna or transmitter 6. The host end product must include a user manual that clearly defines operating requirements and conditions that must be observed to ensure compliance with current FCC RF exposure guidelines. For portable devices, in addition to the conditions 3 through 6 described above, a separate approval is required to satisfy the SAR requirements of FCC Part 2.1093 If the device is used for other equipment that separate approval is required for all other operating configurations, including portable configurations with respect to 2.1093 and different antenna configurations. For this device, OEM integrators must be provided with labeling instructions of finished products. Please refer to KDB784748 D01 v07, section 8. Page 6/7 last two paragraphs: A certified modular has the option to use a permanently affixed label, or an electronic label. For a permanently affixed label, the module must be labeled with an FCC ID - Section 2.926 (see 2.2 Certification (labeling requirements) above). The OEM manual must provide clear instructions explaining to the OEM the labeling requirements, options and OEM user manual instructions that are required (see next paragraph). For a host using a certified modular with a standard fixed label, if (1) the module’s FCC ID is not visible when installed in the host, or (2) if the host is marketed so that end users do not have straight forward commonly used methods for access to remove the module so that the FCC ID of the module is
L600 Hardware Design Copyright © Shanghai Mobiletek Communication Ltd 56 visible; then an additional permanent label referring to the enclosed module:“Contains Transmitter Module FCC ID:2AK9DL600” or “Contains FCC ID: 2AK9DL600” must be used. The host OEM user manual must also contain clear instructions on how end users can find and/or access the module and the FCC ID. The final host / module combination may also need to be evaluated against the FCC Part 15B criteria for unintentional radiators in order to be properly authorized for operation as a Part 15 digital device. The user’s manual or instruction manual for an intentional or unintentional radiator shall caution the user that changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. In cases where the manual is provided only in a form other than paper, such as on a computer disk or over the Internet, the information required by this section may be included in the manual in that alternative form, provided the user can reasonably be expected to have the capability to access information in that form. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the manufacturer could void the user’s authority to operate the equipment. To ensure compliance with all non-transmitter functions the host manufacturer is responsible for ensuring compliance with the module(s) installed and fully operational. For example, if a host was previously authorized as an unintentional radiator under the Declaration of Conformity procedure without a transmitter certified module and a module is added, the host manufacturer is responsible for ensuring that the after the module is installed and operational the host continues to be compliant with the Part 15B unintentional radiator requirements.

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