Telit Communications S p A GE864Q2B Quadband GSM/ GPRS Module User Manual 1vv0300875 GE864 V2 Hardware User Guide r1

Telit Communications S.p.A. Quadband GSM/ GPRS Module 1vv0300875 GE864 V2 Hardware User Guide r1

User Manual

GE864 QUAD V2 and GE864 DUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 2 of 73 APPLICABILITY TABLEAPPLICABILITY TABLEAPPLICABILITY TABLEAPPLICABILITY TABLE PRODUCTPRODUCTPRODUCTPRODUCT GEGEGEGE864864864864----QUADQUADQUADQUAD V2 V2 V2 V2 GEGEGEGE864864864864----DUAL V2DUAL V2DUAL V2DUAL V2
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 3 of 73 DISCLAIMERDISCLAIMERDISCLAIMERDISCLAIMER The information contained in this document is the proprietary information of Telit Communications S.p.A. and its affiliates (“TELIT”). The contents are confidential and any disclosure to persons other than the officers, employees, agents or subcontractors of the owner or licensee of this document, without the prior written consent of Telit, is strictly prohibited. Telit makes every effort to ensure the quality of the information it makes available. Notwithstanding the foregoing, Telit does not make any warranty as to the information contained herein, and does not accept any liability for any injury, loss or damage of any kind incurred by use of or reliance upon the information. Telit disclaims any and all responsibility for the application of the devices characterized in this document, and notes that the application of the device must comply with the safety standards of the applicable country, and where applicable, with the relevant wiring rules. Telit reserves the right to make modifications, additions and deletions to this document due to typographical errors, inaccurate information, or improvements to programs and/or equipment at any time and without notice. Such changes will, nevertheless be incorporated into new editions of this document. Copyright: Transmittal, reproduction, dissemination and/or editing of this document as well as utilization of its contents and communication thereof to others without express authorization are prohibited. Offenders will be held liable for payment of damages. All rights are reserved. Copyright © Telit Communications SpA 2010.©
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 4 of 73 ContentsContentsContentsContents APPLICABILITY TABLE .............................................................................................................................................. 2 1.1.1.1. INTRODUCTIONINTRODUCTIONINTRODUCTIONINTRODUCTION ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................6666 1.1. SCOPE.................................................................................................................................................................. 6 1.2. AUDIENCE............................................................................................................................................................. 6 1.3. CONTACT INFORMATION, SUPPORT........................................................................................................................ 6 1.4. DOCUMENT ORGANIZATION.................................................................................................................................... 7 1.5. TEXT CONVENTIONS.............................................................................................................................................. 8 1.6. RELATED DOCUMENTS........................................................................................................................................... 8 1.7. DOCUMENT HISTORY............................................................................................................................................. 9 2.2.2.2. OVERVIEWOVERVIEWOVERVIEWOVERVIEW ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 10101010 3.3.3.3. GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL MECHANICAL DIMEDUAL MECHANICAL DIMEDUAL MECHANICAL DIMEDUAL MECHANICAL DIMENSIONSNSIONSNSIONSNSIONS.................................................................................................................................................................................................................................................... 11111111 4.4.4.4. GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 MODULE CONNEDUAL V2 MODULE CONNEDUAL V2 MODULE CONNEDUAL V2 MODULE CONNECTIONSCTIONSCTIONSCTIONS.................................................................................................................................................................................................................................................... 12121212 4.1. PIN-OUT........................................................................................................................................................... 12 4.1.1. BGA Balls Layout..................................................................................................................................... 17 5.5.5.5. HARDWARE COMMANDSHARDWARE COMMANDSHARDWARE COMMANDSHARDWARE COMMANDS.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 19191919 5.1. TURNING ON THE GE864-QUAD V2 / GE864-DUAL V2 ................................................................................... 19 5.2. TURNING OFF THE GE864-QUAD V2 / GE864-DUAL V2 ................................................................................. 21 5.2.1. Hardware Unconditional Restart........................................................................................................ 22 6.6.6.6. POPOPOPOWER SUPPLYWER SUPPLYWER SUPPLYWER SUPPLY............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 24242424 6.1. POWER SUPPLY REQUIREMENTS......................................................................................................................... 24 6.2. GENERAL DESIGN RULES.................................................................................................................................... 25 6.2.1. Electrical Design Guidelines............................................................................................................... 25 6.2.2. Thermal Design Guidelines................................................................................................................. 29 6.2.3. Power Supply PCB Layout Guidelines................................................................................................ 30 6.2.4. Parameters for ATEX Applications.................................................................................................... 31 7.7.7.7. ANTENNAANTENNAANTENNAANTENNA ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 33333333 7.1. GSM ANTENNA REQUIREMENTS.......................................................................................................................... 33 7.2. GSM ANTENNA – INSTALLATION GUIDELINES...................................................................................................... 34 8.8.8.8. LOGIC LEVEL SPECIFICLOGIC LEVEL SPECIFICLOGIC LEVEL SPECIFICLOGIC LEVEL SPECIFICATIONSATIONSATIONSATIONS ........................................................................................................................................................................................................................................................................................................................................................................................................................................ 35353535 8.1. RESET SIGNAL.................................................................................................................................................... 36 9.9.9.9. SERIAL PORTSSERIAL PORTSSERIAL PORTSSERIAL PORTS.................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 37373737 9.1. MODEM SERIAL PORT.................................................................................................................................... 37 9.2. RS232 LEVEL TRANSLATION............................................................................................................................. 39 9.3. 5V UART LEVEL TRANSLATION........................................................................................................................... 41 10.10.10.10. AUDIO SECTAUDIO SECTAUDIO SECTAUDIO SECTION OVERVIEWION OVERVIEWION OVERVIEWION OVERVIEW .................................................................................................................................................................................................................................................................................................................................................................................................................................................... 44444444 10.1. SELECTION MODE............................................................................................................................................... 44 10.2. ELECTRICAL CHARACTERISTICS........................................................................................................................ 46 10.2.1. Input Lines Characteristics ...................................................................................................................... 46 10.2.2. Output Lines Characteristics.................................................................................................................... 47
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 5 of 73 11.11.11.11. GENERAL PURPOSE I/OGENERAL PURPOSE I/OGENERAL PURPOSE I/OGENERAL PURPOSE I/O ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 49494949 11.1. GPIO LOGIC LEVELS......................................................................................................................................... 50 11.2. USING A GPIO PAD AS INPUT........................................................................................................................ 51 11.3. USING A GPIO PAD AS OUTPUT .................................................................................................................... 51 11.4. USING THE RF TRANSMISSION CONTROL GPIO4.............................................................................................. 51 11.5. USING THE RFTXMON OUTPUT GPIO5 .......................................................................................................... 52 USING THE ALARM OUTPUT GPIO6................................................................................................................................... 53 11.6. USING THE BUZZER OUTPUT GPIO7................................................................................................................ 53 11.7. MAGNETIC BUZZER CONCEPTS......................................................................................................................... 54 11.7.1. Short Description.................................................................................................................................. 54 11.8.1 Frequency Behavior................................................................................................................................... 55 11.7.2. Power Supply Influence....................................................................................................................... 55 11.7.3. Warning.................................................................................................................................................. 55 11.7.4. Working Current Influence.................................................................................................................. 56 11.8. USING THE TEMPERATURE MONITOR FUNCTION............................................................................................... 56 11.8.1. Short Description.................................................................................................................................. 56 11.8.2. Allowed GPIO......................................................................................................................................... 56 11.9. INDICATION OF NETWORK SERVICE AVAILABILITY............................................................................................. 57 11.10. RTC BYPASS OUT........................................................................................................................................... 58 11.11. DAC CONVERTER............................................................................................................................................ 59 11.11.1. Description......................................................................................................................................... 59 11.11.2. Enabling DAC..................................................................................................................................... 59 11.11.3. Low Pass Filter Example................................................................................................................. 60 11.12. ADC CONVERTER............................................................................................................................................ 60 11.12.1. Description......................................................................................................................................... 60 11.12.2. Using ADC Converter........................................................................................................................ 61 11.13. DEBUG OF THE GE864-QUAD V2 / GE864-DUAL V2 IN PRODUCTION....................................................... 61 12.12.12.12. ASSEMBLY THE GE864ASSEMBLY THE GE864ASSEMBLY THE GE864ASSEMBLY THE GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 ON THE BOARDDUAL V2 ON THE BOARDDUAL V2 ON THE BOARDDUAL V2 ON THE BOARD .................................................................................................................................................................................... 62626262 12.1. RECOMMENDED FOOT PRINT FOR THE APPLICATION.......................................................................................... 63 12.2. STENCIL............................................................................................................................................................. 63 12.3. PCB PAD DESIGN............................................................................................................................................... 64 12.4. SOLDER PASTE................................................................................................................................................... 65 12.4.1. GE865 Solder reflow................................................................................................................................ 66 13.13.13.13. PACKING SYSTEMPACKING SYSTEMPACKING SYSTEMPACKING SYSTEM................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 68686868 13.1. MOISTURE SENSIBILITY...................................................................................................................................... 69 14.14.14.14. CONFORMITY ASSESSMENCONFORMITY ASSESSMENCONFORMITY ASSESSMENCONFORMITY ASSESSMENT ISSUEST ISSUEST ISSUEST ISSUES ........................................................................................................................................................................................................................................................................................................................................................................................70707070 15.15.15.15. SAFETY RECOMMENDATIOSAFETY RECOMMENDATIOSAFETY RECOMMENDATIOSAFETY RECOMMENDATIONSNSNSNS .................................................................................................................................................................................................................................................................................................................................................................................................................................... 72727272
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 6 of 73 1. Introduction 1.1. Scope The aim of this document is the description of some hardware solutions useful for developing a product with the Telit GE864-QUAD V2 / GE864-DUAL V2 module. 1.2. Audience This document is intended for Telit customers, who are integrators, about to implement their applications using our GE864-QUAD V2 / GE864-DUAL V2 module. 1.3. Contact Information, Support For general contact, technical support, to report documentation errors and to order manuals, contact Telit Technical Support Center (TTSC) at: TS-EMEA@telit.com TS-NORTHAMERICA@telit.com TS-LATINAMERICA@telit.com TS-APAC@telit.com Alternatively, use: http://www.telit.com/en/products/technical-support-center/contact.php For detailed information about where you can buy the Telit modules or for recommendations on accessories and components visit: http://www.telit.com To register for product news and announcements or for product questions contact Telit’s Technical Support Center (TTSC). Our aim is to make this guide as helpful as possible. Keep us informed of your comments and suggestions for improvements. Telit appreciates feedback from the users of our information.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 7 of 73 1.4. Document Organization This document contains the following chapters: Chapter 1: “Introduction” provides a scope for this document, target audience, contact and support information, and text conventions. Chapter 2: “Overview” provides an overview of the document. Chapter 3: “GE864-QUAD V2 / GE864-DUAL V2 Mechanical Dimensions” Chapter 4: “GE864-QUAD V2 / GE864-DUAL V2 Module Connections” deals with the pin out configuration and layout. Chapter 5: “Hardware Commands” How to control the module via hardware. Chapter 6: “Power supply” Power supply requirements and general design rules. Chapter 7: “Antenna” The antenna connection and board layout design are the most important parts in the full product design Chapter 8: “Logic Level specifications” Specific values adopted in the implementation of logic levels for this module. Chapter 9: “Serial ports” The serial port on the Telit GE864-QUAD V2 / GE864-DUAL is the core of the interface between the module and OEM hardware Chapter 10: “Audio Section overview” Refers to the audio blocks of the Base Band Chip of the GE864-QUAD V2 / GE864-DUAL Telit Modules. Chapter 11: “General Purpose I/O” How the general purpose I/O pads can be configured. Chapter 12 “DAC and ADC Section” Deals with these two kind of converters. Chapter 13: “Mounting the GE864-QUAD V2 / GE864-DUAL V2 on the application board” Recommendations and specifics on how to mount the module on the user’s board.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 8 of 73 1.5. Text Conventions Danger Danger Danger Danger – This information MUST be followed or catastrophic equipment failure This information MUST be followed or catastrophic equipment failure This information MUST be followed or catastrophic equipment failure This information MUST be followed or catastrophic equipment failure or bodily injury may occur.or bodily injury may occur.or bodily injury may occur.or bodily injury may occur. Caution or Warning Caution or Warning Caution or Warning Caution or Warning – Alerts the user to important points about integratin Alerts the user to important points about integratin Alerts the user to important points about integratin Alerts the user to important points about integrating the g the g the g the module, if these points are not followed, the module and end user equipment module, if these points are not followed, the module and end user equipment module, if these points are not followed, the module and end user equipment module, if these points are not followed, the module and end user equipment may fail or malfunction.may fail or malfunction.may fail or malfunction.may fail or malfunction. Tip or Information Tip or Information Tip or Information Tip or Information – Provides advice and suggestions that may be useful when Provides advice and suggestions that may be useful when Provides advice and suggestions that may be useful when Provides advice and suggestions that may be useful when integrating the module.integrating the module.integrating the module.integrating the module. All dates are in ISO 8601 format, i.e. YYYY-MM-DD. 1.6. Related Documents • Telit's GSM/GPRS Family Software User Guide, 1vv0300784 • Audio settings application note , 80000NT10007a • Digital voice Interface Application Note, 80000NT10004a • Product description, 80331ST10074a • SIM Holder Design Guides, 80000NT10001a • AT Commands Reference Guide, 80000ST10025a • Telit EVK2 User Guide, 1vv0300704
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 9 of 73 1.7. Document History RRRRRRRReeeeeeeevvvvvvvviiiiiiiissssssssiiiiiiiioooooooonnnnnnnn DDDDDDDDaaaaaaaatttttttteeeeeeee CCCCCCCChhhhhhhhaaaaaaaannnnnnnnggggggggeeeeeeeessssssss ISSUE#0 2010-02-03 Release First ISSUE# 0 ISSUE#1 2010-03-29 Updated Par. 5.1, Par.6.1, Par.7.1, Par.9.2,
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 10 of 73 2. Overview In this document all the basic functions of a mobile phone are taken into account; for each one of them a proper hardware solution is suggested and eventually the wrong solutions and common errors to be avoided are evidenced. Obviously this document cannot embrace the whole hardware solutions and products that may be designed. The wrong solutions to be avoided shall be considered as mandatory, while the suggested hardware configurations shall not be considered mandatory, instead the information given shall be used as a guide and a starting point for properly developing your product with the Telit GE864-QUAD V2 / GE864-DUAL V2 module. For further hardware details that may not be explained in this document refer to the Telit GE864-QUAD V2 / GE864-DUAL V2 Product Description document where all the hardware information is reported. NOTICENOTICENOTICENOTICE:::: (EN) The integration of the GSM/GPRS GE864-QUAD V2 / GE864-DUAL V2 cellular module within user application shall be done according to the design rules described in this manual. The information presented in this document is believed to be accurate and reliable. However, no responsibility is assumed by Telit Communications S.p.A. for its use, or any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Telit Communications S.p.A. other than for circuitry embodied in Telit products. This document is subject to change without notice.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 11 of 73 3. GE864-QUAD V2 / GE864-DUAL Mechanical Dimensions The Telit GE864-QUAD V2 / GE864-DUAL V2 module overall dimensions are: • Length: 30 mm • Width: 30 mm • Thickness: 2,9 mm • Weight: 4.2g
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 12 of 73 4. GE864-QUAD V2 / GE864-DUAL V2 Module Connections 4.1. PIN-OUT The GE864-QUAD V2 / GE864-DUAL V2 uses 11x11 array BGA technology connection BallBallBallBall SignalSignalSignalSignal I/OI/OI/OI/O FunctionFunctionFunctionFunction Internal Internal Internal Internal PULL UPPULL UPPULL UPPULL UP TypeTypeTypeType AudioAudioAudioAudio F9F9F9F9 AXE I Handsfree switching 100K CMOS 2.8V G8G8G8G8 MIC_HF+ AI Handsfree mic. input; phase +, nom. level 3mVrms Audio G9G9G9G9 MIC_MT- AI Handset mic.signal input; phase-, nom. level 50mVrms Audio G10G10G10G10 EAR_MT+ AO Handset earphone signal output, phase + Audio J8J8J8J8 MIC_MT+ AI Handset mic.signal input; phase+, nom. level 50mVrms Audio J9J9J9J9 MIC_HF- AI Handsfree mic.input; phase -, nom. level 3mVrms Audio J10J10J10J10 EAR_HF- AO Handsfree ear output, phase - Audio H9H9H9H9 EAR_MT- AO Handset earphone signal output, phase - Audio H10H10H10H10 EAR_HF+ AO Handsfree ear output, phase + Audio SIM card interfaceSIM card interfaceSIM card interfaceSIM card interface C10C10C10C10 SIMCLK O External SIM signal – Clock 1,8 / 3V C11C11C11C11 SIMIN I External SIM signal - Presence (active low) Pull up 47K 1,8 / 3V D4D4D4D4 SIMVCC - External SIM signal – Power supply for the SIM 1,8 / 3V D10D10D10D10 SIMIO I/O External SIM signal - Data I/O Pull up 4.7K 1,8 / 3V E9E9E9E9 SIMRST O External SIM signal – Reset 1,8 / 3V TraceTraceTraceTrace D11D11D11D11 TX_TRACE O TX Data for debug monitor CMOS 2.8V F10F10F10F10 RX_TRACE I RX Data for debug monitor CMOS 2.8V H4H4H4H4 SERVICE I Service pin shall be used to upgrade the module from ASC1 (RX_TRACE, TX_TRACE). The pin shall be tied low to enable the feature only in case of a SW Update activity. It is required, for debug purpose, to be connected to a test pad on the final application. CMOS 2.8V Prog. / Data + HW Flow ControlProg. / Data + HW Flow ControlProg. / Data + HW Flow ControlProg. / Data + HW Flow Control B6B6B6B6 C125/RING O Output for Ring indicator signal (RI) to DTE CMOS 2.8V B7B7B7B7 C108/DTR I Input for Data terminal ready signal (DTR) from DTE CMOS 2.8V D9D9D9D9 C109/DCD O Output for Data carrier detect signal (DCD) to DTE CMOS 2.8V E7E7E7E7 C103/TXD I Serial data input (TXD) from DTE CMOS 2.8V E11E11E11E11 C107/DSR O Output for Data set ready signal (DSR) to DTE CMOS 2.8V F7F7F7F7 C105/RTS I Input for Request to send signal (RTS) from DTE CMOS 2.8V F6F6F6F6 C106/CTS O Output for Clear to send signal (CTS) to DTE CMOS 2.8V H8H8H8H8 C104/RXD O Serial data output to DTE CMOS 2.8V DADADADAC and ADCC and ADCC and ADCC and ADC C7C7C7C7 DAC_OUT AO Digital/Analog converter output D/A J11J11J11J11 ADC_IN1 AI Analog/Digital converter input A/D H11H11H11H11 ADC_IN2 AI Analog/Digital converter input A/D
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 13 of 73 BallBallBallBall SignalSignalSignalSignal I/OI/OI/OI/O FunctionFunctionFunctionFunction Internal Internal Internal Internal PULL UPPULL UPPULL UPPULL UP TypeTypeTypeType Miscellaneous FunctionsMiscellaneous FunctionsMiscellaneous FunctionsMiscellaneous Functions A2A2A2A2 RESET* I Reset input D8D8D8D8 STAT_LED O Status indicator led CMOS 1.8V E2E2E2E2 VRTC AO VRTC Power J5J5J5J5 ON_OFF* I Input command for switching power ON or OFF (toggle command). The pulse to be sent to the GE864-QUAD V2 must be equal or greater than 1 second. Pull up 47K Pull up to VBATT L8L8L8L8 PWRMON I/O PWRMON CMOS 2.8V L4L4L4L4 GSM Antenna O Antenna output – 50 ohm RF Telit GPIOTelit GPIOTelit GPIOTelit GPIO / DVI / DVI / DVI / DVI C1C1C1C1 GPIO_01 I/O GPIO_01 CMOS 2.8V E6E6E6E6 GPIO_02 / JDR I/O GPIO_02 / JDR CMOS 2.8V C2C2C2C2 GPIO_03 I/O GPIO_03 CMOS 2.8V B3B3B3B3 GPIO_04 / TX_DISABLE I/O GPIO_04 / TX_DISABLE CMOS 2.8V K8K8K8K8 GPIO_05 / RFTXMON I/O Telit GPIO05 Configurable GPIO / Transmitter ON monitor CMOS 2.8V B5B5B5B5 GPIO_06 / ALARM I/O Telit GPIO06 Configurable GPIO / ALARM CMOS 2.8V L9L9L9L9 GPIO_07 / BUZZER I/O Telit GPIO07 Configurable GPIO / Buzzer CMOS 2.8V K11K11K11K11 GPIO_08 I/O GPIO_08 CMOS 2.8V C9C9C9C9 GPIO_09 I/O GPIO_09 CMOS 2.8V H3H3H3H3 GPIO_10 / DVI_TX I/O GPIO_10 / DVI_TX CMOS 2.8V K7K7K7K7 DVI_RX I/O DVI_RX CMOS 2.8V D7D7D7D7 DVI_CLK I/O DVI_CLK CMOS 2.8V H5H5H5H5 DVI_WA0 I/O DVI_WA0 CMOS 2.8V Power SupplyPower SupplyPower SupplyPower Supply J1J1J1J1 VBATT - Main power supply Power K1K1K1K1 VBATT - Main power supply Power J2J2J2J2 VBATT - Main power supply Power K2K2K2K2 VBATT - Main power supply Power A1A1A1A1 GND - Ground Power A11A11A11A11 GND - Ground Power D6D6D6D6 GND - Ground Power F1F1F1F1 GND - Ground Power F11F11F11F11 GND - Ground Power HHHH1111 GND - Ground Power H2H2H2H2 GND - Ground Power J3J3J3J3 GND - Ground Power K3K3K3K3 GND - Ground Power K4K4K4K4 GND - Ground Power K5K5K5K5 GND - Ground Power K6K6K6K6 GND - Ground Power L1L1L1L1 GND - Ground Power L2L2L2L2 GND - Ground Power L3L3L3L3 GND - Ground Power
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 14 of 73 BallBallBallBall SignalSignalSignalSignal I/OI/OI/OI/O FunctionFunctionFunctionFunction Internal Internal Internal Internal PULL UPPULL UPPULL UPPULL UP TypeTypeTypeType L6L6L6L6 GND - Ground Power L11L11L11L11 GND - Ground Power RESERVEDRESERVEDRESERVEDRESERVED A3A3A3A3 - - Reserved A4A4A4A4 - - Reserved A5A5A5A5 - - Reserved A6A6A6A6 - - Reserved A7A7A7A7 - - Reserved A8A8A8A8 - - Reserved A9A9A9A9 - - Reserved A10A10A10A10 - - Reserved B1B1B1B1 - - Reserved B2B2B2B2 - - Reserved B4B4B4B4 - - Reserved B8B8B8B8 - - Reserved B9B9B9B9 - - Reserved B10B10B10B10 - - Reserved B11B11B11B11 - - Reserved C3C3C3C3 - - Reserved C4C4C4C4 - - Reserved C5C5C5C5 - - Reserved C6C6C6C6 - - Reserved C8C8C8C8 - - Reserved D1D1D1D1 - - Reserved D2D2D2D2 - - Reserved D3D3D3D3 - - Reserved D5D5D5D5 - - Reserved E1E1E1E1 - - Reserved E3E3E3E3 - - Reserved E4E4E4E4 - - Reserved E5E5E5E5 - - Reserved E8E8E8E8 - - Reserved E10E10E10E10 - - Reserved F2F2F2F2 - - Reserved F3F3F3F3 - - Reserved F4F4F4F4 - - Reserved F5F5F5F5 - - Reserved F8F8F8F8 - - Reserved G1G1G1G1 - - Reserved G2G2G2G2 - - Reserved G3G3G3G3 - - Reserved G4G4G4G4 - - Reserved G5G5G5G5 - - Reserved G6G6G6G6 - - Reserved
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 15 of 73 BallBallBallBall SignalSignalSignalSignal I/OI/OI/OI/O FunctionFunctionFunctionFunction Internal Internal Internal Internal PULL UPPULL UPPULL UPPULL UP TypeTypeTypeType G7G7G7G7 - - Reserved G11G11G11G11 - - Reserved H6H6H6H6 - - Reserved H7H7H7H7 - - Reserved J4J4J4J4 - - Reserved J6J6J6J6 - - Reserved J7J7J7J7 - - Reserved K9K9K9K9 - - Reserved K10K10K10K10 - - Reserved L5L5L5L5 - - Reserved L7L7L7L7 - - Reserved L10L10L10L10 - - Reserved NOTE:NOTE:NOTE:NOTE: The GE864-QUAD V2 / GE864-DUAL V2 Modules has only one DVI ports on the system interface. NOTE:NOTE:NOTE:NOTE: Reserved pins must not be connected. NOTE:NOTE:NOTE:NOTE: RTS must be connected to the GND (on the module side) if flow control is not used.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 16 of 73 NOTENOTENOTENOTE:::: If not used, almost all pins must be left disconnected. The only exceptions are the following pins: BallBallBallBall SignalSignalSignalSignal FunctionFunctionFunctionFunction JJJJ1111, J, J, J, J2222, K1, K2, K1, K2, K1, K2, K1, K2 VBATT Main power supply A1, A11, D6, F1, F11, H1, A1, A11, D6, F1, F11, H1, A1, A11, D6, F1, F11, H1, A1, A11, D6, F1, F11, H1, H2, J3, K3, K4, K5H2, J3, K3, K4, K5H2, J3, K3, K4, K5H2, J3, K3, K4, K5, K6, L1, , K6, L1, , K6, L1, , K6, L1, L2, L3, L6, L11L2, L3, L6, L11L2, L3, L6, L11L2, L3, L6, L11 GND Ground E7E7E7E7 C103/TXD Serial data input (TXD) from DTE H8H8H8H8 C104/RXD Serial data output to DTE F7F7F7F7 C105/RTS Input for Request to send signal (RTS) from DTE J5J5J5J5 ON/OFF* Input command for switching power ON or OFF (toggle command). A2A2A2A2 RESET* Reset input F10F10F10F10 RX_TRACE RX Data for debug monitor D11D11D11D11 TX_TRACE TX Data for debug monitor H4H4H4H4 SERVICE SERVICE connection
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 17 of 73 4.1.1.4.1.1.4.1.1.4.1.1. BGA Balls LayoutBGA Balls LayoutBGA Balls LayoutBGA Balls Layout TOP VIEWTOP VIEWTOP VIEWTOP VIEW AAAA BBBB CCCC DDDD EEEE FFFF GGGG HHHH JJJJ KKKK LLLL 1111 GND - GPIO_01 - - GND - GND VBATT VBATT GND 2222 RESET* - GPIO_03 - VRTC - - GND VBATT VBATT GND 3333 - GPIO_04 / TX_DISABLE - - - _ - GPIO_10 / DVI_TX GND GND GND 4444 -- - - SIMVCC - - - SERVICE - GND GSM Antenna 5555 - GPIO_06 / ALARM - - - - - DVI_WA0 ON_OFF* GND - 6666 - C125/RING - GND GPIO_02 / JDR C106 / CTS - - - GND GND 7777 - C108 / DTR DAC_OUT DVI_CLK C103 / TXD C105 / RTS - - - DVI_RX - 8888 - - - STAD_ LED - - MIC_HF+ C104 / RXD MIC_MT+ GPIO_05 / RFTXMON PWRMON 9999 - - GPIO_09 C109 / DCD SIMRST AXE MIC_MT- EAR_MT- MIC_HF- - GPIO_07 / BUZZER 10101010 - - SIMCLK SIMIO - RX_TRACE EAR_MT+ EAR_HF+ EAR_HF- - - 11111111 GND - SIMIN TX_TRACE C107 / DSR GND - ADC_IN2 ADC_IN1 GPIO_08 GND
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 18 of 73 AUDIO Signals balls SIM CARD interface balls TRACE Signals balls Prog. / data + Hw Flow Control signals balls ADC signals balls MISCELLANEOUS functions signals balls TELIT GPIO balls POWER SUPPLY VBATT balls POWER SUPPLY GND balls RESERVED
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 19 of 73 5. Hardware Commands 5.1. Turning ON the GE864-QUAD V2 / GE864-DUAL V2 To turn the GE864-QUAD V2 / GE864-DUAL V2 on, the pad ON# must be tied low for at least 1000ms and then released. A pulse duration less than 1000ms should also start the power on procedure, but this is not guaranteed. The maximum current that can be drained from the ON# pad is 0,1 mA. A simple circuit to do it is: TIP:TIP:TIP:TIP: To check if the device has powered on, the hardware line PWRMON must be monitored. After 1000ms the line raised up the device could be considered powered on. NOTE:NOTE:NOTE:NOTE: Do not use any pull up resistor on the ON# line, it is internally pulled up. Using pull up resistor may bring to latch up problems on the GE864-QUAD V2 / GE864-DUAL V2 power regulator and improper power on/off of the module. The line ON# must be connected only in open collector configuration. In this document all the lines that are inverted, hence have active low signals are labeled with a name that ends with a "#" or with a bar over the name. NOTENOTENOTENOTE: When the power supply voltage is lower than 3.4V, to turn ON the module, the pad ON# must be tied low for at least 3 seconds.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 20 of 73 For example: 1- Let us assume you need to drive the ON# pad with a totem pole output of a +3/5 V microcontroller (uP_OUT1): 2- Let us assume you need to drive the ON# pad directly with an ON/OFF button: A flow chart with proper turn on procedure is detailed below:
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 21 of 73 5.2. Turning OFF the GE864-QUAD V2 / GE864-DUAL V2 Turning off of the device can be done in three ways: • by software command (see GE864-QUAD V2 / GE864-DUAL V2 Software User Guide) • by tying low pin ON# Either ways, the device issues a detach request to network informing that the device will not be reachable any more. To turn OFF the GE864-QUAD V2 / GE864-DUAL via pin ON#, this must be tied low for at least 1000ms and then released.The same circuitry and timing for the power on shall be used.The device shuts down after the release of the ON# pin. The following flow chart shows the proper turnoff procedure: TIP:TIP:TIP:TIP: To check if the device has powered off, the hardware line PWRMON must be monitored. When PWRMON goes low, then the device has powered off.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 22 of 73 5.2.1. Hardware Unconditional Restart WARNING: The hardware unconditional Restart must not be used during normal operation of the device since it does not detach the device from the network. It shall be kept as an emergency exit procedure to be done in the rare case that the device gets stacked waiting for some network or SIM responses. To unconditionally Restart the GE864-QUAD V2 / GE864-DUAL V2, the pad RESET# must be tied low for at least 200 ms and then released. The maximum current that can be drained from the RESET# pad is 0,15 mA. A simple circuit to do it is: NOTE:NOTE:NOTE:NOTE: Do not use any pull up resistor on the RESET* line nor any totem pole digital output. Using pull up resistor may cause latch up problems on the GE864-QUAD V2 / GE864-DUAL V2 power regulator and improper functioning of the module. The line RESET* must be connected only in open collector configuration. TIP:TIP:TIP:TIP: The unconditional hardware reboot must always be implemented on the boards and the software must use it as an emergency exit procedure.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 23 of 73 In the following flow chart is detailed the proper restart procedure: For example: 1- Let us assume you need to drive the RESET# pad with a totem pole output of a +3/5 V microcontroller (uP_OUT2):
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 24 of 73 6. Power Supply The power supply circuitry and board layout are a very important part in the full product design and they strongly reflect on the product overall performances, hence read carefully the following requirements and guidelines for a proper design. 6.1. Power Supply Requirements ConditionConditionConditionCondition ValueValueValueValue Nominal Supply Voltage 3.80 V Normal operating Voltage Range 3.40 V - 4.20 V Extended operating Voltage Range 3.22 V – 4.50 V The GE864-QUAD V2 / GE864-DUAL V2 power consumptions are: GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2DUAL V2DUAL V2DUAL V2 ModeModeModeMode Average (mA)Average (mA)Average (mA)Average (mA) Mode descriptionMode descriptionMode descriptionMode description SWITCHED OFFSWITCHED OFFSWITCHED OFFSWITCHED OFF Switched Off <62 uA Module supplied but Switched Off IDLE modeIDLE modeIDLE modeIDLE mode AT+CFUN=1 19.0 Normal mode: full functionality of the module AT+CFUN=4 18.0 Disabled TX and RX; module is not registered on the network 3.9 Paging Multiframe 2 2.9 Paging Multiframe 4 2.1 Paging Multiframe 6 1.9 Paging Multiframe 8 AT+CFUN=0 or =5 1.6 Paging Multiframe 9 CSD TX and RX modeCSD TX and RX modeCSD TX and RX modeCSD TX and RX mode GSM900 CSD PL5 300 DCS1800 CSD PL0 200 GSM VOICE CALL GPRS (class 10) 1TXGPRS (class 10) 1TXGPRS (class 10) 1TXGPRS (class 10) 1TX GSM900 PL5 260 DCS1800 PL0 170 GPRS Sending data mode GPRSGPRSGPRSGPRS (class 10) 2TX (class 10) 2TX (class 10) 2TX (class 10) 2TX GSM900 PL5 470 DCS1800 PL0 300 GPRS Sending data mode
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 25 of 73 The GSM system is made in a way that the RF transmission is not continuous but it is packed into bursts at a base frequency of about 216 Hz. The relative current peaks can be as high as about 2A. Therefore the power supply has to be designed in order to withstand with these current peaks without big voltage drops; this means that both the electrical design and the board layout must be designed for this current flow. If the layout of the PCB is not well designed, then a strong noise floor is generated on the ground and the supply; this will reflect on all the audio paths producing an audible and annoying noise at 216 Hz; if the voltage drop during the peak current absorption is too much, then the device may even shutdown as a consequence of the supply voltage drop. TIPTIPTIPTIP:::: The power supply must be designed so that it is capable of a peak current output of at least 2 A. TIPTIPTIPTIP: the supply voltage is directly measured between VBATT and GND balls. It must stay within the Wide Supply Voltage tolerant range including any drop voltage and overshoot voltage (during the slot tx, for example). NOTENOTENOTENOTE: The Operating Voltage Range MUST never be exceeded also in power off condition; care must be taken in order to fulfill min/max voltage requirement NOTENOTENOTENOTE: When the power supply voltage is lower than 3.4V, to turn ON the module, the pad ON# must be tied low for at least 3 seconds. 6.2. General Design Rules The principal guidelines for the Power Supply Design embrace three different design steps: • the electrical design • the thermal design • the PCB layout. 6.2.1. Electrical Design Guidelines The electrical design of the power supply depends strongly from the power source where this power is drained. We will distinguish them into three categories: • +5V input (typically PC internal regulator output) • +12V input (typically automotive) • Battery
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 26 of 73 6.2.1.1.6.2.1.1.6.2.1.1.6.2.1.1. ++++5V input Source Power Supply Design Guidelines5V input Source Power Supply Design Guidelines5V input Source Power Supply Design Guidelines5V input Source Power Supply Design Guidelines • The desired output for the power supply is 3.8V, hence there is no big difference between the input source and the desired output. A linear regulator can be used. A switching power supply will not be suited because of the low drop out requirements. • When using a linear regulator, a proper heat sink shall be provided in order to dissipate the power generated. • A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks close to the GE864-QUAD V2 / GE864-DUAL V2, a 100µF tantalum capacitor is usually suited. • Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is rated at least 10V. • A protection diode can be inserted close to the power input, in order to save the GE864-QUAD V2 / GE864-DUAL V2 from power polarity inversion. An example of linear regulator with 5V input is:
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 27 of 73 6.2.1.2.6.2.1.2.6.2.1.2.6.2.1.2. ++++12V input Source Power Supply Design Guidelines12V input Source Power Supply Design Guidelines12V input Source Power Supply Design Guidelines12V input Source Power Supply Design Guidelines • The desired output for the power supply is 3.8V, hence, due to the big difference between the input source and the desired output, a linear regulator is not suited and shall not be used. A switching power supply will be preferable because of its better efficiency especially with the 2A peak current load represented by the GE864-QUAD V2 / GE864-DUAL V2. • When using a switching regulator, a 500kHz (or more) switching frequency regulator is preferable, because of its smaller inductor size and its faster transient response. This allows the regulator to respond quickly to the current peaks absorption. • In any case the frequency and switching design selection is related to the application to be developed, due to the fact that the switching frequency could also generate EMC interferences. • As far as car PB battery, the input voltage can rise up to 15.8V. This must be kept in mind when choosing components: all components in the power supply must withstand this voltage. • A Bypass low ESR capacitor of adequate capacity must be provided, in order to cut the current absorption peaks. A 100µF tantalum capacitor is typically used. • Make sure the low ESR capacitor on the power supply output (usually a tantalum one) is rated at least 10V. • As far as car applications, a spike protection diode must be inserted close to the power input, in order to clean the supply from spikes. • A protection diode can be inserted close to the power input, in order to save the GE864-QUAD V2 / GE864-DUAL V2 from power polarity inversion. This can be the same diode used for spike protection.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 28 of 73 An example of switching regulator with 12V input is in the schematic below (split in 2 parts):
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 29 of 73 6.2.1.3.6.2.1.3.6.2.1.3.6.2.1.3. Battery Source Power Supply Design GuidelinesBattery Source Power Supply Design GuidelinesBattery Source Power Supply Design GuidelinesBattery Source Power Supply Design Guidelines The desired nominal output for the power supply is 3.8V and the maximum voltage allowed is 4.5V. A single 3.7V Li-Ion cell battery type is suited for supplying the power to the Telit GE864-QUAD V2 / GE864-DUAL V2 module. CAUTION:CAUTION:CAUTION:CAUTION: The three cells Ni/Cd or Ni/MH 3,6 V Nom. Battery types or 4V PB types MUST NOT BE USED DIRECTLY since their maximum voltage can rise over the absolute maximum voltage for the GE864-QUAD V2 / GE864-DUAL V2 and damage it. CAUTION:CAUTION:CAUTION:CAUTION: DO NOT USE any Ni-Cd, Ni-MH, and Pb battery types directly connected with GE864-QUAD V2 / GE864-DUAL V2. Their use can lead to overvoltage on the GE864-QUAD V2 / GE864-DUAL V2 and damage it. USE ONLY Li-Ion battery types. A Bypass low ESR capacitor of adequate capacity must be provided, in order to cut the current absorption peaks. A 100µF tantalum capacitor is typically used. Make sure the low ESR capacitor (usually a tantalum one) is rated at least 10V. A protection diode can be inserted close to the power input, in order to save the GE864-QUAD V2 / GE864-DUAL V2 from power polarity inversion. Otherwise the battery connector must be done in a way to avoid polarity inversions when connecting the battery. The battery capacity must be at least 500mAh in order to withstand the current peaks of 2A; the suggested capacity is from 500mAh to 1000mAh. 6.2.2. Thermal Design Guidelines The thermal design for the power supply heat sink must be done with the following specifications: • Average current consumption during transmission @PWR level max: 500mA • Average current consumption during transmission @ PWR level min: 100mA • Average current during Power Saving (CFUN=5): from 1.6 to 3.9mA • Average current during idle (Power Saving disabled): 19mA
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 30 of 73 NOTENOTENOTENOTE:::: The average consumption during transmissions depends on the power level at which the device is requested to transmit by the network. The average current consumption hence varies significantly. Considering the very low current during idle, especially if Power Saving function is enabled, it is possible to consider from the thermal point of view that the device absorbs current significantly only during calls. If we assume that the device stays into transmission for short periods of time (let us say few minutes) and then remains for a quite long time in idle (let us say one hour), then the power supply has always the time to cool down between the calls, and the heat sink could be smaller than the calculated one for 500mA maximum RMS current, or even could be the simple chip package (no heat sink). Moreover, in the average network conditions, the device is requested to transmit at a lower power level than the maximum, hence the current consumption will be less than 500mA, usually around 150mA. For these reasons the thermal design is rarely a concern and the simple ground plane where the power supply chip is placed grants a good thermal condition to avoid overheating as well. As far as the heat generated by the GE864-QUAD V2 / GE864-DUAL V2, you can consider it to be during transmissions of 1W max during CSD/VOICE calls and 2W max during class10 GPRS upload. This generated heat will be mostly conducted to the ground plane under the GE864-QUAD V2 / GE864-DUAL V2; you must ensure that your application can dissipate it. 6.2.3. Power Supply PCB Layout Guidelines As seen on the electrical design guidelines the power supply shall have a low ESR capacitor on the output to cut the current peaks and a protection diode on the input to protect the supply from spikes and polarity inversion. The placement of these components is crucial for the correct working of the circuitry. A misplaced component can be useless or can even decrease the power supply performances. • The Bypass low ESR capacitor must be placed close to the Telit GE864-QUAD V2 / GE864-DUAL V2 power input pads or in the case the power supply is a switching type it can be placed close to the inductor to cut the ripple provided the PCB trace from the capacitor to the GE864-QUAD V2 / GE864-DUAL V2 is wide enough to ensure a dropless connection even during the 2A current peaks. • The protection diode must be placed close to the input connector where the power source is drained.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 31 of 73 • The PCB traces from the input connector to the power regulator IC must be wide enough to ensure no voltage drops occur when the 2A current peaks are absorbed. Note that this is not made in order to save power loss but especially to avoid the voltage drops on the power line at the current peaks frequency of 216 Hz that will reflect on all the components connected to that supply, introducing the noise floor at the burst base frequency. For this reason while a voltage drop of 300-400 mV may be acceptable from the power loss point of view, the same voltage drop may not be acceptable from the noise point of view. If your application does not have audio interface but only uses the data feature of the Telit GE864-QUAD V2 / GE864-DUAL V2, then this noise is not so disturbing and power supply layout design can be more forgiving. • The PCB traces to the GE864-QUAD V2 / GE864-DUAL V2 and the Bypass capacitor must be wide enough to ensure no significant voltage drops occur when the 2A current peaks are absorbed. This is for the same reason as previous point. Try to keep this trace as short as possible. • The PCB traces connecting the Switching output to the inductor and the switching diode must be kept as short as possible by placing the inductor and the diode very close to the power switching IC (only for switching power supply). This is done in order to reduce the radiated field (noise) at the switching frequency (100-500 kHz usually). • The use of a good common ground plane is suggested. • The placement of the power supply on the board must be done in such a way to guarantee that the high current return paths in the ground plane are not overlapped to any noise sensitive circuitry as the microphone amplifier/buffer or earphone amplifier. • The power supply input cables must be kept separate from noise sensitive lines such as microphone/earphone cables. 6.2.4. Parameters for ATEX Applications In order to integrate the Telit’s GE864-QUAD V2 / GE864-DUAL V2 module into an ATEX application, the appropriate reference standard IEC EN xx and integrations shall be followed. Below are listed parameters and useful information to integrate the module in your application: • Total capacity: 27.45 uF • Total inductance: 55.20 nH • No voltage upper than supply voltage is present in the module. • No step-up converters are present in the module.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 32 of 73 • In abnormal conditions, the maximum RF output power may be up to 34 dBm. For this particular application, we recommend the customer to involve TTSC (Telit Technical Support Center) in the design phase of the application.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 33 of 73 7. Antenna The antenna connection and board layout design are the most important part in the full product design and they strongly reflect on the product overall performances, hence read carefully and follow the requirements and the guidelines for a proper design. 7.1. GSM Antenna Requirements As suggested on the Product Description the antenna for a Telit GE864-QUAD V2 / GE864-DUAL V2 device shall fulfill the following requirements: ANTENNA REQUIREMENTSANTENNA REQUIREMENTSANTENNA REQUIREMENTSANTENNA REQUIREMENTS Frequency rangeFrequency rangeFrequency rangeFrequency range Depending by frequency band(s) provided by the network operator, the customer shall use the most suitable antenna for that/those band(s) BandwidthBandwidthBandwidthBandwidth for GEfor GEfor GEfor GE864864864864----QUAD V2QUAD V2QUAD V2QUAD V2 70 MHz in GSM850, 80 MHz in GSM900, 170 MHz in DCS and 140 MHz PCS band Bandwidth Bandwidth Bandwidth Bandwidth for GEfor GEfor GEfor GE888864646464----DUAL V2DUAL V2DUAL V2DUAL V2 80 MHz in GSM900 and 170 MHz in DCS GainGainGainGain Gain < 1,4dBi in GSM 850 & 900 and < 3,0dBi DCS & PCS ImpedanceImpedanceImpedanceImpedance 50 • Input powerInput powerInput powerInput power > 2 W peak power VSWR absolute maxVSWR absolute maxVSWR absolute maxVSWR absolute max <= 10:1 VSWR recommendedVSWR recommendedVSWR recommendedVSWR recommended <= 2:1 Furthermore if the device is developed for the US market and/or Canada market, it shall comply to the FCC and/or IC approval requirements: This device is to be used only for mobile and fixed application. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter. End-Users must be provided with transmitter operation conditions for satisfying RF exposure compliance. OEM integrators must ensure that the end user has no manual instructions to remove or install the GE864-QUAD V2 / GE864-DUAL V2 module. Antennas used for this OEM module must not exceed 3dBi gain for mobile and fixed operating configurations.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 34 of 73 7.2. GSM Antenna – Installation Guidelines • Install the antenna in a place covered by the GSM signal. • The Antenna must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter; • Antenna shall not be installed inside metal cases • Antenna shall be installed also according Antenna manufacturer instructions.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 35 of 73 8. Logic Level Specifications Where not specifically stated, all the interface circuits work at 2.8V CMOS logic levels. The following table shows the logic level specifications used in the Telit GE864-QUAD V2 / GE864-DUAL V2 interface circuits: Absolute Maximum RAbsolute Maximum RAbsolute Maximum RAbsolute Maximum Ratings atings atings atings – Not FunctionalNot FunctionalNot FunctionalNot Functional ParameterParameterParameterParameter MinMinMinMin MaxMaxMaxMax Input level on any digital pin when on -0.3V +3.1V Input voltage on analog pins when on -0.3V +3.0 V Operating Range Operating Range Operating Range Operating Range – Interface L Interface L Interface L Interface Levels (2.8V CMOS)evels (2.8V CMOS)evels (2.8V CMOS)evels (2.8V CMOS) LevelLevelLevelLevel MinMinMinMin MaxMaxMaxMax Input high level 2.1V 3.1V Input low level 0V 0.5V Output high level 2.2V 3.0V Output low level 0V 0.35V For 1,8V signals: Operating Range Operating Range Operating Range Operating Range – Interface Levels (1.8V CMOS) Interface Levels (1.8V CMOS) Interface Levels (1.8V CMOS) Interface Levels (1.8V CMOS) LevelLevelLevelLevel MinMinMinMin MaxMaxMaxMax Input high level 1.6V 2.2V Input low level 0V 0.4V Output high level 1,65V 2.2V Output low level 0V 0.35V CCCCurrent characteristicsurrent characteristicsurrent characteristicsurrent characteristics LevelLevelLevelLevel TypicalTypicalTypicalTypical Output Current 1mA Input Current 1uA
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 36 of 73 8.1. Reset Signal SignalSignalSignalSignal FunctionFunctionFunctionFunction I/OI/OI/OI/O BallBallBallBall Number Number Number Number RESET Reset I A2 RESET is used to reset the GE864-QUAD V2 / GE864-DUAL V2 modules. Whenever this signal is pulled low, the GE864-QUAD V2 / GE864-DUAL V2 is reset. When the device is reset it stops any operation. After the release of the reset GE864-QUAD V2 / GE864-DUAL V2 is unconditionally shut down, without doing any detach operation from the network where it is registered. This behavior is not a proper shut down because any GSM device is requested to issue a detach request on turn off. For this reason the Reset signal must not be used to normally shutting down the device, but only as an emergency exit in the rare case the device remains stuck waiting for some network response. The RESET is internally controlled on start-up to achieve always a proper power-on reset sequence, so there is no need to control this pin on start-up. It may only be used to reset a device already on that is not responding to any command. NOTE:NOTE:NOTE:NOTE: Do not use this signal to power off the GE864-QUAD V2 / GE864-DUAL V2. Use the ON/OFF signal to perform this function or the AT#SHDN command. Reset Signal Operating Reset Signal Operating Reset Signal Operating Reset Signal Operating LLLLevels:evels:evels:evels: SignalSignalSignalSignal MinMinMinMin MaxMaxMaxMax RESET Input high 2.0V* 2.2V RESET Input low 0V 0.2V * this signal is internally pulled up so the pin can be left floating if not used. If unused, this signal may be left unconnected. If used, then it must always be must always be must always be must always be connected with an open collector transistorconnected with an open collector transistorconnected with an open collector transistorconnected with an open collector transistor, to permit to the internal circuitry the power on reset and under voltage lockout functions.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 37 of 73 9. Serial Ports The serial port on the Telit GE864-QUAD V2 / GE864-DUAL V2 is the core of the interface between the module and OEM hardware. 2 serial ports are available on the module: • MODEM SERIAL PORT • MODEM SERIAL PORT 2 (TRACE for debug) 9.1. MODEM SERIAL PORT Several configurations can be designed for the serial port on the OEM hardware, but the most common are: • RS232 PC com port • microcontroller UART @ 2.8V – 3V (Universal Asynchronous Receive Transmit) • microcontroller UART@ 5V or other voltages different from 2.8V Depending from the type of serial port on the OEM hardware a level translator circuit may be needed to make the system work. The only configuration that does not need a level translation is the 2.8V UART. The serial port on the GE864-QUAD V2 / GE864-DUAL V2 is a +2.8V UART with all the 7 RS232 signals. It differs from the PC-RS232 in the signal polarity (RS232 is reversed) and levels. The levels for the GE864-QUAD V2 / GE864-DUAL V2 UART are the CMOS levels: Absolute Maximum Ratings Absolute Maximum Ratings Absolute Maximum Ratings Absolute Maximum Ratings –Not FunctionalNot FunctionalNot FunctionalNot Functional ParameterParameterParameterParameter MinMinMinMin MaxMaxMaxMax Input level on any digital pad when on -0.3V +3.1V Input voltage on analog pads when on -0.3V +3.0 V
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 38 of 73 Operating Range Operating Range Operating Range Operating Range – Interface levels (2.8V CMOS) Interface levels (2.8V CMOS) Interface levels (2.8V CMOS) Interface levels (2.8V CMOS) LevelLevelLevelLevel MinMinMinMin MaxMaxMaxMax Input high level VIH 2.1V 3.1V Input low level VIL 0V 0.5V Output high level VOH 2.2V 3.0V Output low level VOL 0V 0.35V The table below shows the signals of the GE864-QUAD V2 / GE864-DUAL V2 serial port: RS232 Pin RS232 Pin RS232 Pin RS232 Pin NumberNumberNumberNumber SignaSignaSignaSignallll GE864GE864GE864GE864----QUAD V2 / QUAD V2 / QUAD V2 / QUAD V2 / GE864GE864GE864GE864----DUAL V2DUAL V2DUAL V2DUAL V2 Pad Pad Pad Pad NumberNumberNumberNumber NameNameNameName UsageUsageUsageUsage 1 DCD – dcd_uart D9 Data Carrier Detect Output from the GE864-QUAD V2 / GE864-DUAL V2 that indicates the carrier presence 2 RXD – tx_uart H8 Transmit line *see Note Output transmit line of GE864-QUAD V2 / GE864-DUAL V2 UART 3 TXD – rx_uart E7 Receive line *see Note Input receive of the GE864-QUAD V2 / GE864-DUAL V2 UART 4 DTR – dtr_uart B7 Data Terminal Ready Input to the GE864-QUAD V2 / GE864-DUAL V2 that controls the DTE READY condition 5 GND A1,F1, H1 L1, H2, L2, J3, K3…. Ground ground 6 DSR – dsr_uart E11 Data Set Ready Output from the GE864-QUAD V2 / GE864-DUAL V2 that indicates the module is ready 7 RTS –rts_uart F7 Request to Send Input to the GE864-QUAD V2 / GE864-DUAL V2 that controls the Hardware flow control 8 CTS – cts_uart F6 Clear to Send Output from the GE864-QUAD V2 / GE864-DUAL V2 that controls the Hardware flow control 9 RI – ri_uart B6 Ring Indicator Output from the GE864-QUAD V2 / GE864-DUAL V2 that indicates the incoming call condition ****NOTE:NOTE:NOTE:NOTE: According to V.24, RX/TX signal names are referred to the application side, therefore on the GE864-QUAD V2 / GE864-DUAL V2 side these signal are on the opposite direction: TXD on the application side will be connected to the receive line (here named TXD/ rx_uart ) of the GE864-QUAD V2 / GE864-DUAL V2 serial port and viceversa for RX.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 39 of 73 TIP:TIP:TIP:TIP: For a minimum implementation, only the TXD and RXD lines can be connected, the other lines can be left open provided a software flow control is implemented. 9.2.9.2.9.2.9.2. RS232 LRS232 LRS232 LRS232 Level evel evel evel TTTTranslationranslationranslationranslation In order to interface the Telit GE864-QUAD V2 / GE864-DUAL V2 with a PC com port or a RS232 (EIA/TIA-232) application a level translator is required. This level translator must • invert the electrical signal in both directions • change the level from 0/+3V to +15/-15V Actually, the RS232 UART 16450, 16550, 16650 & 16750 chipsets accept signals with lower levels on the RS232 side (EIA/TIA-562), allowing for a lower voltage-multiplying ratio on the level translator. Note that the negative signal voltage must be less than 0V and hence some sort of level translation is always required. The simplest way to translate the levels and invert the signal is by using a single chip level translator. There are a multitude of them, differing in the number of driver and receiver and in the levels (be sure to get a true RS232 level translator not a RS485 or other standards). By convention the driver is the level translator from the 0/+3V UART level to the RS232 level, while the receiver is the translator from RS232 level to 0/+3V UART. In order to translate the whole set of control lines of the UART you will need: • 5 driver • 3 receiver NOTE:NOTE:NOTE:NOTE: The digital input lines working at 2.8VCMOS have an absolute maximum input voltage of 3,1V; therefore the level translator IC shall not be powered by the +3.8V supply of the module. Instead it shall be powered from a +2.8V / +3.0V (dedicated) power supply. This is because in this way the level translator IC outputs on the module side (i.e. GE864-QUAD V2 / GE864-DUAL V2 inputs) will work at +3.8V interface levels, stressing the module inputs at its maximum input voltage. This can be acceptable for evaluation purposes, but not on production devices.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 40 of 73 NOTE:NOTE:NOTE:NOTE: In order to be able to do in circuit reprogramming of the GE864-QUAD V2 / GE864-DUAL V2 firmware, the serial port on the Telit GE864-QUAD V2 / GE864-DUAL V2 shall be available for translation into RS232 and either it is controlling device shall be placed into tristate, disconnected or as a gateway for the serial data when module reprogramming occurs. Only RXD, TXD, GND, SERVICE and the On/off module turn on pad are required to the reprogramming of the module, the other lines are unused. All applicator shall include in their design such a way of reprogramming the GE864-QUAD V2 / GE864-DUAL V2. An example of level translation circuitry of this kind is:
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 41 of 73 The RS232 serial port lines are usually connected to a DB9 connector with the following layout: 9.3. 5V UART Level Translation If the OEM application uses a microcontroller with a serial port (UART) that works at a voltage different from 2.8 – 3V, then a circuitry has to be provided to adapt the different levels of the two set of signals. As for the RS232 translation there are a multitude of single chip translators. For example a possible translator circuit for a 5V TRANSMITTER/RECEIVER can be:
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 42 of 73 TIP:TIP:TIP:TIP: Note that the TC7SZ07AE has open drain output; therefore the resistor R2 is mandatory.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 43 of 73 NOTE:NOTE:NOTE:NOTE: The UART input line TXD (rx_uart) of the GE864-QUAD V2 / GE864-DUAL V2 is NOT internally pulled up with a resistor, so there may be the need to place an external 47KΩ pull-up resistor, either the DTR (dtr_uart) and RTS (rts_uart) input lines are not pulled up internally, so an external pull-up resistor of 47KΩ may be required. Care must be taken to avoid latch-up on the GE864-QUAD V2 / GE864-DUAL V2 and the use of this output line to power electronic devices shall be avoided, especially for devices that generate spikes and noise such as switching level translators, micro controllers, failure in any of these condition can severely compromise the GE864-QUAD V2 / GE864-DUAL V2 functionality. NOTE:NOTE:NOTE:NOTE: In case of reprogramming of the module has to be considered the use of the RESET line to start correctly the activity. The preferable configuration is having an external supply for the buffer level translator.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 44 of 73 10. Audio Section Overview The first Baseband chip was developed for the cellular phones, which needed two separated amplifiers both in RX and in TX section. A couple of amplifiers had to be used with internal audio transducers while the other couple of amplifiers had to be used with external audio transducers. To distinguish the schematic signals and the Software identifiers, two different definitions were introduced, with the following meaning: • internal audio transducers  HSHSHSHS/MT (from HHHHandSSSSet or MMMMicroTTTTelephone ) • external audio transducers  HFHFHFHF (from HHHHandsFFFFree ) Actually the acronyms have not the original importance. In other words this distinction is not necessary, being the performances between the two blocks like the same. Only if the customer needs higher output power to drive the speaker, he needs to adopt the Aduio2 Section ( HF ) . Otherwise the choice could be done in order to overcome the PCB design difficulties. For these reasons we have not changed the HS and HF acronyms, keeping them in the Software and on the schematics. The Base Band Chip of the GE864-QUAD V2 / GE864-DUAL V2 Telit Modules maintains the same architecture. For more information and suggestions refer to Telit document: • Audio settings application note , 80000NT10007a 10.1.10.1.10.1.10.1. Selection mode Selection mode Selection mode Selection mode Only one block can be active at a time, and the activation of the requested audio path is done via hardware ,by AXEAXEAXEAXE line, or via software ,by AT#CAPAT#CAPAT#CAPAT#CAP command . Moreover the SidetoneSidetoneSidetoneSidetone functionality could be implemented by the amplifier fitted between the transmit path and the receive path, enabled at request in both modes.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 45 of 73 MICN2100nF100nFSingle endedBalancedSingle endedBiasMICP2100nF100nFSingle ended16Balancedxgaffull.skdEar MT+Ear MT-MICP1MICN1Mic MT-Mic MT+Ear HF+Mic HF+Mic HF-LOUD1Ear HF-LOUD2 HS Earpiece HF Speaker Fully DifferentialAudio AmplifierFully DifferentialAudio Amplifier HSMicrophone HFMicrophoneAUDIO 2SECTIONAUDIO 1SECTION BasebandAudio Front EndEP P1EP N1Single endedBiasBalanced8Balanced GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 DUAL V2 DUAL V2 DUAL V2 Audio Front End Block DiagramAudio Front End Block DiagramAudio Front End Block DiagramAudio Front End Block Diagram
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 46 of 73 10.2.10.2.10.2.10.2. Electrical CharacteristicsElectrical CharacteristicsElectrical CharacteristicsElectrical Characteristics TIP: TIP: TIP: TIP: Being the microphone circuitry the more noise sensitive, its design and layout must be done with particular care. Both microphone paths are balanced and the OEM circuitry must be balanced designed to reduce the common mode noise typically generated on the ground plane. However the customer can use the unbalanced circuitry for its particular application. 10.2.1.10.2.1.10.2.1.10.2.1. Input Lines CharacteristicsInput Lines CharacteristicsInput Lines CharacteristicsInput Lines Characteristics “MIC_MT” and “MIC_HF” differential microphone paths“MIC_MT” and “MIC_HF” differential microphone paths“MIC_MT” and “MIC_HF” differential microphone paths“MIC_MT” and “MIC_HF” differential microphone paths Line Coupling AC* Line Type Balanced Differential input voltage ≤ 1,03Vpp @ Mic G=0dB Gain steps 7 Gain increment 6dB per step Coupling capacitor ≥ 100nF Differential input resistance 50KΩ Input capacitance • 10pF (*) WARNING : (*) WARNING : (*) WARNING : (*) WARNING : AC means that the signals from the microphone have to be connected to input lines of the module through capacitors which value has to be ≥ 100nF. Not respecting this constraint, the input stages will be damaged. WARNING: WARNING: WARNING: WARNING: when particular OEM application needs a Single Ended Input configuration, it is forbidden connecting the unused input directly to Ground, but only through a 100nF capacitor. Don’t forget that the useful input signal will be halved in Single Ended Input configuration.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 47 of 73 10.2.2.10.2.2.10.2.2.10.2.2. Output Lines CharacteristicsOutput Lines CharacteristicsOutput Lines CharacteristicsOutput Lines Characteristics TIPTIPTIPTIP: We suggest driving the load differentially from both output drivers, thus the output swing will double and the need for the output coupling capacitor avoided. However if particular OEM application needs also a Single Ended circuitry can be implemented, but the output power will be reduced four times . The OEM circuitry shall be designed to reduce the common mode noise typically generated on the ground plane and to get the maximum power output from the device (low resistance tracks). WARNING: WARNING: WARNING: WARNING: The loads are directly connected to the amplifier outputs when in Differential configuration, through a capacitor when in Single Ended configuration. Using a Single Ended configuration, the unused output line must be left open . Not respecting this constraint, the output stage will be damaged. TIP : TIP : TIP : TIP : Remember that there are slightly different electrical performances between the two internal audio amplifiers: • the “Ear_MTEar_MTEar_MTEar_MT” lines can directly drive a 16161616Ω load load load load at –12dBFS (**)(**)(**)(**) in Differential configuration • the “Ear_HFEar_HFEar_HFEar_HF” lines can directly drive a 4444Ω load load load load in Differential configurations • There is no difference if the amplifiers drive an external amplifier (**) (**) (**) (**) 0dBFS is the normalized overall Analog Gain for each Output channel equal to 3,7Vpp differential
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 48 of 73 “EAR_MTEAR_MTEAR_MTEAR_MT” Output Lines Output Lines Output Lines Output Lines line coupling AC single-ended DC differential 0dBFS normalized gain 3,7 Vpp differential output load resistance ≥ 16 Ω @ -12dBFS internal output resistance 4Ω (typical) signal bandwidth 150 - 4000 Hz @ -3 dB maximal full scale differential output voltage 3,7 Vpp (typical) Rload=open circuit differential output voltage 925mVpp / Rload=16Ω @ -12dBFS volume increment 2 dB per step volume steps 10 “EAR_HFEAR_HFEAR_HFEAR_HF” Output LinesOutput LinesOutput LinesOutput Lines line coupling AC single-ended DC differential output load resistance ≥ 8 Ω signal bandwidth 150 - 4000 Hz @ -3 dB maximal output power @ battery voltage ≥ 3,6V 0.35 Wrms /8 Ω volume increment 2 dB per step volume steps 10
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 49 of 73 11. General Purpose I/O The general-purpose I/O pads can be configured to act in three different ways: • Input • Output • Alternate function (internally controlled) Input pads can only be read and report the digital value (high or low) present on the pad at the read time; output pads can only be written or queried and set the value of the pad output; an alternate function pad is internally controlled by the GE864-QUAD V2 / GE864-DUAL V2 firmware and acts depending on the function implemented. The following GPIO are available on the GE864-QUAD V2 / GE864-DUAL V2: BallBallBallBall SignalSignalSignalSignal I/OI/OI/OI/O FunctionFunctionFunctionFunction TypeTypeTypeType Input / output Input / output Input / output Input / output currentcurrentcurrentcurrent DefaultDefaultDefaultDefault sssstatetatetatetate ON_OFF ON_OFF ON_OFF ON_OFF statestatestatestate During During During During ResetResetResetReset statestatestatestate NoteNoteNoteNote C1C1C1C1 TGPIO_01 I/O GPIO01 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 E6E6E6E6 TGPIO_02 / JDR I/O GPIO02 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 Alternate function (JDR) C2C2C2C2 TGPIO_03 I/O GPIO03 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 B3B3B3B3 TGPIO_04 / TXCNTRL I/O GPIO04 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 Alternate function (RF Transmission Control) K8K8K8K8 TGPIO_05 / RFTXMON I/O GPIO05 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 Alternate function (RFTXMON) B5B5B5B5 TGPIO_06 / ALARM I/O GPIO06 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 Alternate function (ALARM) L9L9L9L9 TGPIO_07 / BUZZER I/O GPIO07 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 Alternate function (BUZZER) K11K11K11K11 TGPIO_08 I/O GPIO08 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 C9C9C9C9 TGPIO_09 I/O GPIO09 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 H3H3H3H3 TGPIO_10 / DVI_TX I/O GPIO10 Configurable GPIO CMOS 2.8V 1uA / 1mA INPUT 0 0 Alternate function (DVI_TX)
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 50 of 73 Not all GPIO pads support all these three modes: • GPIO2 supports all three modes and can be input, output, Jamming Detect Output (Alternate function) • GPIO4 supports all three modes and can be input, output, RF Transmission Control (Alternate function) • GPIO5 supports all three modes and can be input, output, RFTX monitor output (Alternate function) • GPIO6 supports all three modes and can be input, output, alarm output (Alternate function) • GPIO7 supports all three modes and can be input, output, buzzer output (Alternate function) 11.1.11.1.11.1.11.1. GPIO Logic GPIO Logic GPIO Logic GPIO Logic LLLLevelsevelsevelsevels Where not specifically stated, all the interface circuits work at 2.8V CMOS logic levels. The following tables show the logic level specifications used in the GE864-QUAD V2 / GE864-DUAL V2 interface circuits: Absolute Maximum Ratings Absolute Maximum Ratings Absolute Maximum Ratings Absolute Maximum Ratings –Not FunctionalNot FunctionalNot FunctionalNot Functional ParameterParameterParameterParameter MinMinMinMin MaxMaxMaxMax Input level on any digital pin when on -0.3V +3.1V Input voltage on analog pins when on -0.3V +3.0 V Operating Range Operating Range Operating Range Operating Range – Interface L Interface L Interface L Interface Levels (2.8V CMOS)evels (2.8V CMOS)evels (2.8V CMOS)evels (2.8V CMOS) LevelLevelLevelLevel MinMinMinMin MaxMaxMaxMax Input high level 2.1V 3.1V Input low level 0V 0.5V Output high level 2.2V 3.0V Output low level 0V 0.35V
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 51 of 73 11.2. Using a GPIO Pad as INPUT The GPIO pads, when used as inputs, can be connected to a digital output of another device and report its status, provided this device has interface levels compatible with the 2.8V CMOS levels of the GPIO. If the digital output of the device to be connected with the GPIO input pad has interface levels different from the 2.8V CMOS, then it can be buffered with an open collector transistor with a 47K pull up to 2.8V, this pull up must be switched off when the module is in off condition. 11.3. Using a GPIO Pad as OUTPUT The GPIO pads, when used as outputs, can drive 2.8V CMOS digital devices or compatible hardware. When set as outputs, the pads have a push-pull output and therefore the pull-up resistor may be omitted. The illustration below shows the base circuit of a push-pull stage: 11.4. Using the RF Transmission Control GPIO4 The GPIO4 pin, when configured as RF Transmission Control Input, permits to disable the Transmitter when the GPIO is set to Low by the application. In the design is necessary to add a resistor 47K pull up to 2.8V, this pull up must be switched off when the module is in off condition. Q1Q2VDDGPIO7
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 52 of 73 11.5. Using the RFTXMON Output GPIO5 The GPIO5 pin, when configured as RFTXMON Output, is controlled by the module and will rise when the transmitter is active and fall after the transmitter activity is completed. For example, if a call is started, the line will be HIGH during all the conversation and it will be again LOW after hanged up. The line rises up 300ms before first TX burst and will became again LOW from 500ms to 1sec after last TX burst.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 53 of 73 Using the Alarm Output GPIO6 The GPIO6 pad, when configured as Alarm Output, is controlled by the module and will rise when the alarm starts and fall after the issue of a dedicated AT command. This output can be used to power up the module controlling micro controller or application at the alarm time, giving you the possibility to program a timely system wake-up to achieve some periodic actions and completely turn off either the application and the module during sleep periods, dramatically reducing the sleep consumption to few µA. In battery-powered devices this feature will greatly improve the autonomy of the device. NOTE:NOTE:NOTE:NOTE: During RESET the line is set to HIGH logic level. 11.6. Using the Buzzer Output GPIO7 As Alternate Function, the GPIO7 is controlled by the firmware that depends on the function implemented internally. This setup places always the GPIO7 pin in OUTPUT direction and the corresponding function must be activated properly by AT#SRPAT#SRPAT#SRPAT#SRP command (refer to AT commands specification). Also in this case, the dummy value for the pin state can be both “0” or “1”. • Send the command AT#GPIO=7, 1, 2<cr>: • Wait for response OK • Send the command AT#SRP=3 The GPIO7 pin will be set as Alternate Function pin with its dummy logic status set to HIGH value. The “Alternate Function” permits your application to easily implement Buzzer Buzzer Buzzer Buzzer featurefeaturefeaturefeature with some small hardware extension of your application as shown in the sample figure below.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 54 of 73 Example of Buzzer’s driving circuit NOTE:NOTE:NOTE:NOTE: To correctly drive a buzzer, a driver must be provided; its characteristics depend on the Buzzer and for them refer to your buzzer vendor. 11.7. Magnetic Buzzer Concepts 11.7.1. Short Description A magnetic Buzzer is a sound-generating device with a coil located in the magnetic circuit consisting of a permanent magnet, an iron core, a high permeable metal disk, and a vibrating diaphragm. Drawing of the Magnetic Buzzer TR1BCR141WTR2SMBT2907AR14,7KR21KD1D1N4148 C133pF +-+V buzzerGPIO7
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 55 of 73 The disk and diaphragm are attracted to the core by the magnetic field. When an oscillating signal is moved through the coil, it produces a fluctuating magnetic field, which vibrates the diaphragm at a frequency of the drive signal. Thus the sound is produced relative to the frequency applied. Diaphragm movement 1.1.1 Frequency Behavior The frequency behavior represents the effectiveness of the reproduction of the applied signals. Because its performance is related to a square driving waveform (whose amplitude varies from 0V to Vpp), if you modify the waveform (e.g. from square to sinus) the frequency response will change. 11.7.2. Power Supply Influence Applying a signal whose amplitude is different from that suggested by manufacturer, the performance change following the rule: if resonance frequency ffffo increases, amplitude decreases. Because of resonance frequency depends from acoustic design, lowering the amplitude of the driving signal the response bandwidth tends to become narrow, and vice versa. Summarizing: Vpp ↑  ffffo ↓ Vpp ↓  ffffo ↑ The risk is that the ffffoooo could easily fall outside of new bandwidth; consequently the SPL could be much lower than the expected. 11.7.3. Warning It is very important to respect the sense of the applied voltage: never apply to the “-“ pin a voltage more positive than the “+” pin. If this happens, the diaphragm vibrates in the opposite sense with a high probability to be expelled from its physical position, damaging the device forever.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 56 of 73 11.7.4. Working Current Influence In the component data sheet you will find the value of MAX CURRENT that represents the maximum average current that can flow at nominal voltage without current limitation. In other words it is not the peak current, which could be twice or three times higher. If driving circuitry does not support these peak values, the SPL will never reach the declared level or the oscillations will stop. 11.8. Using the Temperature Monitor Function 11.8.1. Short Description The Temperature Monitor is a function of the module that permits to control its internal temperature and if properly set (see the #TEMPMON command on AT Interface guide) it raise to High Logic level a GPIO when the maximum temperature is reached. 11.8.2. Allowed GPIO The AT#TEMPMON set command could be used with one of the following GPIO: SignalSignalSignalSignal FunctionFunctionFunctionFunction TypeTypeTypeType Input / Input / Input / Input / output output output output currentcurrentcurrentcurrent NoteNoteNoteNote TGPIO_01 GPIO01 Configurable GPIO CMOS 2.8V 1µA / 1mA TGPIO_03 GPIO03 Configurable GPIO CMOS 2.8V 1µA / 1mA TGPIO_08 GPIO08 Configurable GPIO CMOS 2.8V 1µA / 1mA TGPIO_09 GPIO09 Configurable GPIO CMOS 2.8V 1µA / 1mA TGPIO_10 GPIO10 Configurable GPIO CMOS 2.8V 1µA / 1mA The set command could be used also with one of the following GPIO but in that case the alternate function is not usable: SignalSignalSignalSignal FunctionFunctionFunctionFunction TypeTypeTypeType Input / Input / Input / Input / output output output output currentcurrentcurrentcurrent NoteNoteNoteNote TGPIO_02 GPIO02 Configurable GPIO CMOS 2.8V 1µA / 1mA Alternate function (JDR) TGPIO_04 GPIO04 Configurable GPIO CMOS 2.8V 1µA / 1mA Alternate function (RF Transmission Control) TGPIO_05 GPIO05 Configurable GPIO CMOS 2.8V 1µA / 1mA Alternate function (RFTXMON) TGPIO_07 GPIO07 Configurable GPIO CMOS 2.8V 1µA / 1mA Alternate function (BUZZER)
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 57 of 73 11.9. Indication of Network Service Availability The STAT_LED pin status shows information on the network service availability and Call status. In the GE864-QUAD V2 / GE864-DUAL V2 modules, the STAT_LED usually needs an external transistor to drive an external LED. Therefore, the status indicated in the following table is reversed with respect to the pin status. LED stLED stLED stLED statusatusatusatus DeviceDeviceDeviceDevice StatusStatusStatusStatus Permanently off Device off Fast blinking (Period 1s, Ton 0,5s) Net search / Not registered / turning off Slow blinking (Period 3s, Ton 0,3s) Registered full service Permanently on a call is active A schematic example could be:
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 58 of 73 11.10. RTC Bypass Out The VRTC pin brings out the Real Time Clock supply, which is separate from the rest of the digital part, allowing having only RTC going on when all the other parts of the device are off. To this power output a backup capacitor can be added in order to increase the RTC autonomy during power off of the battery. NO Devices must be powered from this pin.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 59 of 73 11.11. DAC Converter 11.11.1. Description BallBallBallBall SignalSignalSignalSignal I/OI/OI/OI/O FunctionFunctionFunctionFunction InternalInternalInternalInternal Pull upPull upPull upPull up TypeTypeTypeType DAC ConverterDAC ConverterDAC ConverterDAC Converter C7C7C7C7 DAC_OUT AO Digital/Analog converter output D/A The GE864-QUAD V2 / GE864-DUAL V2 module provides one Digital to Analog Converter. The on board DAC is a 10-bit converter, able to generate a analogue value based a specific input in the range from 0 up to 1023. However, an external low-pass filter is necessary. MinMinMinMin MaxMaxMaxMax UnitsUnitsUnitsUnits Voltage range (filtered) 0 2,6 Volt Range 0 1023 Steps The precision is 10 bits, so if we consider that the maximum voltage is 2V, the integrated voltage could be calculated with the following formula: Integrated output voIntegrated output voIntegrated output voIntegrated output voltage = 2 * value / 1023ltage = 2 * value / 1023ltage = 2 * value / 1023ltage = 2 * value / 1023 DAC_OUT line must be integrated (for example with a low band pass filter) in order to obtain an analog voltage. 11.11.2. Enabling DAC The AT command below is available to use the DAC function: AT#DAC[=<enable>[,<value>]]AT#DAC[=<enable>[,<value>]]AT#DAC[=<enable>[,<value>]]AT#DAC[=<enable>[,<value>]] <value><value><value><value> – scale factor of the integrated output voltage (0–1023, with 10 bit precision), and it must be present if <enable>=1<enable>=1<enable>=1<enable>=1. Refer to SW User Guide or AT Commands Reference Guide for the full description of this function. Refer to SW User Guide or AT Commands Reference Guide for the full description of this function.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 60 of 73 NOTE:NOTE:NOTE:NOTE: The DAC frequency is selected internally. D/A converter must not be used during POWERSAVING. 11.11.3. Low Pass Filter Example 11.12. ADC Converter 11.12.1. Description BallBallBallBall SignalSignalSignalSignal I/OI/OI/OI/O FunctionFunctionFunctionFunction InternalInternalInternalInternal Pull upPull upPull upPull up TypeTypeTypeType ADC ConvADC ConvADC ConvADC Converterserterserterserters J11J11J11J11 ADC_IN1 AI Analog/Digital converter input A/D H11H11H11H11 ADC_IN2 AI Analog/Digital converter input A/D The GE864-QUAD V2 / GE864-DUAL V2 module provides three Analog to Digital Converter. The on board A/D are 11-bit converter. They are able to read a voltage level in the range of 0÷2 volts applied on the ADC pin input, store and convert it into 11 bit word. MinMinMinMin MaxMaxMaxMax UnitsUnitsUnitsUnits Input Voltage range 0 2 Volt AD conversion - 11 bits Resolution - < 1 mV
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 61 of 73 11.12.2. Using ADC Converter The AT command below is available to use the ADC function: AT#ADC=1,2AT#ADC=1,2AT#ADC=1,2AT#ADC=1,2 The read value is expressed in mV. Refer to SW User Guide or AT Commands Reference Guide for the full description of this function. 11.13.11.13.11.13.11.13. Debug of the Debug of the Debug of the Debug of the GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2DUAL V2DUAL V2DUAL V2 in in in in ProductionProductionProductionProduction To test and debug the mounting of the GE864-QUAD V2 / GE864-DUAL, we strongly recommend to foreseen test pads on the host PCB, in order to check the connection between the GE864-QUAD V2 / GE864-DUAL V2 itself and the application and to test the performance of the module connecting it with an external computer. Depending by the customer application, these pads include, but are not limited to the following signals: BallBallBallBall SignalSignalSignalSignal FunctionFunctionFunctionFunction JJJJ1111, J, J, J, J2222, K1, K2, K1, K2, K1, K2, K1, K2 VBATT Main power supply A1, A11, D6, F1, F11, A1, A11, D6, F1, F11, A1, A11, D6, F1, F11, A1, A11, D6, F1, F11, H1, H2, J3, K3, K4, H1, H2, J3, K3, K4, H1, H2, J3, K3, K4, H1, H2, J3, K3, K4, K5, K6, L1,K5, K6, L1,K5, K6, L1,K5, K6, L1, L2, L3, L2, L3, L2, L3, L2, L3, L6, L11L6, L11L6, L11L6, L11 GND Ground E7E7E7E7 C103/TXD Serial data input (TXD) from DTE H8H8H8H8 C104/RXD Serial data output (RXD) to DTE L8L8L8L8 PRWMON Power ON Monitor J5J5J5J5 ON/OFF* Input command for switching power ON or OFF (toggle command). A2A2A2A2 RESET* Reset input F10F10F10F10 RX_TRACE RX Data for debug monitor D11D11D11D11 TX_TRACE TX Data for debug monitor H4H4H4H4 SERVICE SERVICE connection
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 62 of 73 12. Assembly the GE864-QUAD V2 / GE864-DUAL V2 on the Board The Telit GE864-QUAD V2 / GE864-DUAL V2 have been designed in order to be compliant with the standard lead-free SMT process. LeadLeadLeadLead----free Alloy:free Alloy:free Alloy:free Alloy: Surface finishing Sn/Ag/Cu for all solder pads Pin A1
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 63 of 73 12.1.12.1.12.1.12.1. Recommended foot print for the applicationRecommended foot print for the applicationRecommended foot print for the applicationRecommended foot print for the application NNNNOOOOTTTTEEEE:::: In order to easily rework the GE864-QUAD V2 / GE864-DUAL V2 module is suggested to consider on the application a 1.5mm inhibit area around the module. It is also suggested, as common rule for a SMT component, to avoid having a mechanical part of the application in direct contact with the module. 12.2.12.2.12.2.12.2. StencilStencilStencilStencil Stencil’s apertures layout can be the same of the recommended footprint (1:1), we suggest a thickness of stencil foil >120µm.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 64 of 73 12.3.12.3.12.3.12.3. PCB pad designPCB pad designPCB pad designPCB pad design Non solder mask defined” (NSMD) type is recommended for the solder pads on the PCB. Recommendations for PCB pad dimensions Ball pitch [mm] 2,4 Solder resist opening diameter A [mm] 1,150 Metal pad diameter B [mm] 1 ± 0.05
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 65 of 73 It is recommended no microvia without solder resist cover under the module and no microvia around the pads (see following figure). Holes in pad are allowed only for blind holes and not for through holes. Recommendations for PCB pad surfaces: FinishFinishFinishFinish Layer thickness [µm]Layer thickness [µm]Layer thickness [µm]Layer thickness [µm] PropertiesPropertiesPropertiesProperties Electro-less Ni / Immersion Au 3 –7 / 0.05 – 0.15 good solder ability protection, high shear force values The PCB must be able to resist the higher temperatures which are occurring at the lead-free process. This issue should be discussed with the PCB-supplier. Generally, the wettability of tin-lead solder paste on the described surface plating is better compared to lead-free solder paste. 12.4.12.4.12.4.12.4. SolderSolderSolderSolder paste paste paste paste Lead freeLead freeLead freeLead free Solder pasteSolder pasteSolder pasteSolder paste Sn/Ag/Cu
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 66 of 73 12.4.1.12.4.1.12.4.1.12.4.1. GE865 Solder reflowGE865 Solder reflowGE865 Solder reflowGE865 Solder reflow The following is the recommended solder reflow profile Profile FeatureProfile FeatureProfile FeatureProfile Feature PbPbPbPb----Free AssemblyFree AssemblyFree AssemblyFree Assembly Average ramp-up rate (TL to TP) 3°C/second max Preheat – Temperature Min (Tsmin) – Temperature Max (Tsmax) – Time (min to max) (ts) 150°C 200°C 60-180 seconds Tsmax to TL – Ramp-up Rate 3°C/second max Time maintained above: – Temperature (TL) – Time (tL) 217°C 60-150 seconds Peak Temperature (Tp) 245 +0/-5°C Time within 5°C of actual Peak Temperature (tp) 10-30 seconds Ramp-down Rate 6°C/second max. Time 25°C to Peak Temperature 8 minutes max.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 67 of 73 NOTE:NOTE:NOTE:NOTE: All temperatures refer to topside of the package, measured on the package body surface WARNINGWARNINGWARNINGWARNING:::: The GE865 module withstands one reflow process only.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 68 of 73 13. Packing system The GE864-QUAD V2 / GE864-DUAL V2 are packaged on trays of 20202020 pieces each. This is especially suitable for the GE864-QUAD V2 / GE864-DUAL V2 according to SMT processes for pick & place movement requirements. The size of the tray is: 329 x 176mm. Section A-A
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 69 of 73 WARNING:WARNING:WARNING:WARNING: These trays can withstand at the maximum temperature of 65° C. NOTE:NOTE:NOTE:NOTE: All temperatures refer to topside of the package, measured on the package body surface 13.1.13.1.13.1.13.1. Moisture sensibilityMoisture sensibilityMoisture sensibilityMoisture sensibility The level of moisture sensibility of GE864-QUAD V2 / GE864-DUAL V2 is “3”, in according with standard IPC/JEDEC J-STD-020, take care all the relatives requirements for using this kind of components.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 70 of 73 14. Conformity Assessment Issues The Telit GE864-QUAD V2 has been assessed in order to satisfy the essential requirements of the R&TTE Directive 1999/05/EC (Radio Equipment & Telecommunications Terminal Equipments) to demonstrate the conformity against the harmonized standards with the final involvement of a Notified Body. If the module is installed in conformance to the Telit installation manuals, no further evaluation under Article 3.2Article 3.2Article 3.2Article 3.2 of the R&TTE Directive and do not require further involvement of a R&TTE Directive Notified Body for the final product. In all other cases, or if the manufacturer of the final product is in doubt, then the equipment integrating the radio module must be assessed against Article 3.2Article 3.2Article 3.2Article 3.2 of the R&TTE Directive. In all cases the assessment of the final product must be made against the Essential requirements of the R&TTE Directive Articles 3.1(a)Articles 3.1(a)Articles 3.1(a)Articles 3.1(a) and (b)(b)(b)(b), Safety and EMC respectively, and any relevant Article 3.3 requirements. This Hardware User Guide contains all the information you may need for developing a product meeting the R&TTE Directive. Furthermore the GE864-QUAD V2 module is FCC Approved as module to be installed in other devices. This device is to be used only for fixed and mobile applications. If the final product after integration is intended for portable use, a new application and FCC is required. The GE864-QUAD V2 is conforming to the following US Directives: • Use of RF Spectrum. Standards: FCC 47 Part 24 (GSM 1900) • EMC (Electromagnetic Compatibility). Standards: FCC47 Part 15 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. To meet the FCC's RF exposure rules and regulations:
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 71 of 73 • The system antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all the persons and must not be co-located or operating in conjunction with any other antenna or transmitter. • The system antenna(s) used for this module must not exceed 1.4dBi (850MHz) and 3.0dBi (1900MHz) for mobile and fixed or mobile operating configurations. • Users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance. Manufacturers of mobile, fixed or portable devices incorporating this module are advised to clarify any regulatory questions and to have their complete product tested and approved for FCC compliance.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 72 of 73 15. SAFETY RECOMMENDATIONS NOTE:NOTE:NOTE:NOTE: Read this section carefully to ensure the safe operation. Be sure the use of this product is allowed in the country and in the environment required. The use of this product may be dangerous and has to be avoided in the following areas: • Where it can interfere with other electronic devices in environments such as hospitals, airports, aircrafts, etc • Where there is risk of explosion such as gasoline stations, oil refineries, etc It is responsibility of the user to enforce the country regulation and the specific environment regulation. Do not disassemble the product; any mark of tampering will compromise the warranty validity. We recommend following the instructions of the hardware user guides for a correct wiring of the product. The product has to be supplied with a stabilized voltage source and the wiring has to be conforming to the security and fire prevention regulations. The product has to be handled with care, avoiding any contact with the pins because electrostatic discharges may damage the product itself. Same cautions have to be taken for the SIM, checking carefully the instruction for its use. Do not insert or remove the SIM when the product is in power saving mode. The system integrator is responsible of the functioning of the final product; therefore, care has to be taken to the external components of the module, as well as of any project or installation issue, because the risk of disturbing the GSM network or external devices or having impact on the security. Should there be any doubt, please refer to the technical documentation and the regulations in force. Every module has to be equipped with a proper antenna with specific characteristics. The antenna has to be installed with care in order to avoid any interference with other electronic devices and has to guarantee a minimum distance from the body (20 cm). In case of this requirement cannot be satisfied, the system integrator has to assess the final product against the SAR regulation EN 50360.
GE864GE864GE864GE864----QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864QUAD V2 / GE864----DUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User GuideDUAL V2 Hardware User Guide 1vv0300875 Rev.1 – 2010-03-29 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 73 of 73 The European Community provides some Directives for the electronic equipments introduced on the market. All the relevant information are available on the European Community website: http://europa.eu.int/comm/enterprise/rtte/dir99-5.htm The text of the Directive 99/05 regarding telecommunication equipments is available, while the applicable Directives (Low Voltage and EMC) are available at: http://europa.eu.int/comm/enterprise/electr_equipment/index_en.htm

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