Telit Wireless Solutions GE910 Hardware User's Manual
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Telit Wireless Solutions GE910 Hardware User's Manual

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GE910 Hardware User Guide
1vv0300962 Rev.4 – 2012-06-25

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Summary of Contents for Telit Wireless Solutions GE910

  • Page 1 GE910 Hardware User Guide 1vv0300962 Rev.4 – 2012-06-25...
  • Page 2 APPLICABILITY TABLE APPLICABILITY TABLE APPLICABILITY TABLE PRODUCT PRODUCT PRODUCT PRODUCT GE910 GE910- - - - QUAD QUAD GE910 GE910 QUAD QUAD Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 2 of 73 Mod. 0805 2011-07 Rev.2...
  • Page 3 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE Notice While reasonable efforts have been made to assure the accuracy of this document, Telit assumes no liability resulting from any inaccuracies or omissions in this document, or from use of the information obtained herein.
  • Page 4 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 Usage and Disclosure Restrictions License Agreements The software described in this document is the property of Telit and its licensors. It is furnished by express license agreement only and may be used only in accordance with the terms of such an agreement.

  • Page 5: Table Of Contents

    LGA PADs Layout..............................16 Hardware Commands..............................17 4.1. Turning ON the GE910 ............................17 4.2. Turning OFF the GE910 ............................21 4.3. HW Unconditional Shutdown on GE910 .......................23 4.3.1. Hardware Unconditional shutdown ......................23 Power Supply.................................26 5.1. Power Supply Requirements ..........................26 5.2. Power Consumption ...............................27 5.3.
  • Page 6 External SIM Holder Implementation ........................56 11.7. ADC Converter ..............................56 11.7.1. Description ..............................56 11.7.2. Using ADC Converter ...........................56 Mounting the GE910 on your Board........................57 12.1. General ...................................57 12.2. Module finishing & dimensions ..........................57 12.3. Recommended foot print for the application......................58 12.4.

  • Page 7: Introduction

    1.1. Scope The aim of this document is the description of some hardware solutions useful for developing a product with the Telit GE910 module. 1.2. Audience This document is intended for Telit customers, who are integrators, about to implement their applications using our GE910 modules.

  • Page 8: Document Organization

    Chapter 7: “Logic Level specifications” Specific values adopted in the implementation of logic levels for this module. Chapter 8: “Serial ports” The serial port on the Telit GE910 is the core of the interface between the module and OEM hardware Chapter 9: “Audio Section overview”...

  • Page 9: Text Conventions

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 1.5. Text Conventions Danger – This information MUST be followed or catastrophic equipment failure or bodily injury may occur. Caution or Warning – Alerts the user to important points about integrating the module, if these points are not followed, the module and end user equipment may fail or malfunction.

  • Page 10: Overview

    Telit GE910 module. For further hardware details that may not be explained in this document refer to the Telit GE910 Product Description document where all the hardware information is reported.

  • Page 11: Ge910 Module Connections

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 GE910 module connections 3.1. PIN-OUT Signal Function Type COMMENT USB HS 2.0 COMMUNICATION PORT USB_D+ USB differential Data (+) USB_D- USB differential Data (-) Asynchronous UART - Prog.
  • Page 12 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 GPIO_02 GPIO_02 CMOS 1.8V GPIO_03 GPIO_03 CMOS 1.8V GPIO_04 GPIO_04 CMOS 1.8V GPIO_05 GPIO_05 CMOS 1.8V GPIO_06 GPIO_06 CMOS 1.8V GPIO_07 GPIO_07 CMOS 1.8V...
  • Page 13 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 Ground Power Ground Power Ground Power Ground Power Ground Power Ground Power Ground Power Ground Power Ground Power Ground Power Ground...
  • Page 14 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED...
  • Page 15 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 RESERVED RESERVED RESERVED RESERVED WARNING: Reserved pins must not be connected. NOTE: If not used, almost all pins should be left disconnected. The only exceptions are the following...

  • Page 16: Lga Pads Layout

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 3.2. LGA PADs Layout TOP VIEW VBATT_ VBATT_ VBATT VBATT_ VBATT_ EAR+ VBATT SIMVC EAR- SIMIN MIC+ SIMIO MIC- SIMCL DVI_RX...

  • Page 17: Hardware Commands

    Hardware Commands 4.1. Turning ON the GE910 To turn on the GE910 the pad ON-OFF* must be tied low for at least 5 seconds and then released. The maximum current that can be drained from the ON-OFF* pad is 0,2 mA.
  • Page 18 NOTE: In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the GE910 when the module is powered off or during an ON/OFF transition. Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 18 of 73 Mod.
  • Page 19 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 The Flow chart showing the AT commands managing procedure is displayed below: Start AT CMD. DELAY= 300mSec Enter AT<CR> AT init sequence.
  • Page 20 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 For example: 1- Let's assume you need to drive the ON* pad with a totem pole output of a +3/5 V...

  • Page 21: Turning Off The Ge910

    To turn OFF the GE910 the pad ON* must be tied low for at least 2 seconds and then released. A Pulse duration less than 2 seconds should also start the power off procedure, but this is not guaranteed.
  • Page 22 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 The following flow chart shows the proper turnoff procedure: Modem OFF Proc. PWMON = ON? ON_OFF = LOW Delay = 2 Sec ON_OFF = HIGH Modem ON Proc.

  • Page 23: Hw Unconditional Shutdown On Ge910

    Do not use any pull up resistor on the HW_SHUTDOWN* line or any totem pole digital output. Using pull up resistor may bring to latch up problems on the GE910 power regulator and improper functioning of the module. The line HW_SHUTDOWN* must be connected only in open collector configuration.
  • Page 24 NOTE: In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the GE910 when the module is powered off or during an ON/OFF transition. Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 24 of 73 Mod.
  • Page 25 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 For example: 1. Let us assume you need to drive the HW_SHUTDOWN* pad with a totem pole output of a +3/5 V microcontroller: Reproduction forbidden without Telit Communications S.p.A.

  • Page 26: Power Supply

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 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 requirements and the guidelines that will follow for a proper design.

  • Page 27: Power Consumption

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 5.2. Power Consumption The GE910 power consumptions are: GE910 Average Mode Mode description (mA) SWITCHED OFF Module supplied but Switched Off...

  • Page 28: General Design Rules

    • A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks close to the GE910, 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.
  • Page 29 A protection diode should be inserted close to the power input, in order to save the GE910 from power polarity inversion. This can be the same diode as for spike protection. An example of switching regulator with 12V input is in the below schematic: Reproduction forbidden without Telit Communications S.p.A.
  • Page 30 USED DIRECTLY since their maximum voltage can rise over the absolute maximum voltage for the GE910 and damage it. NOTE: DON'T USE any Ni-Cd, Ni-MH, and Pb battery types directly connected with GE910. Their use can lead to overvoltage on the GE910 and damage it. USE ONLY Li-Ion battery types. •...

  • Page 31: Thermal Design Guidelines

    For the heat generated by the GE910, you can consider it to be during transmission 1W max during CSD/VOICE calls and 2W max during class10 GPRS upload.

  • Page 32: Power Supply Pcb Layout Guidelines

    PCB trace from the capacitor to the GE910 is wide enough to ensure a dropless connection even during the 2A current peaks.

  • Page 33: Antenna

    GE910 antenna pad (LGA pad K1) by means of a transmission line implemented on the PCB. In the case the antenna is not directly connected at the antenna pad of the GE910, then a PCB line is needed in order to connect with it or with its connector.

  • Page 34: Gsm Antenna - Pcb Line Guidelines

    Keep the antenna line far away from the GE910 power supply lines; • If EM noisy devices are present on the PCB hosting the GE910, such as fast switching ICs, take care of the shielding of the antenna line by burying it inside the layers of PCB and surround it with Ground planes, or shield it with a metal frame cover.

  • Page 35: Pcb Guidelines In Case Of Fcc Certification

    6.3. PCB Guidelines in case of FCC certification In the case FCC certification is required for an application using GE910, according to FCC KDB 996369 for modular approval requirements, the transmission line has to be similar to that implemented on GE910 interface board and described in the following chapter.

  • Page 36: Transmission Line Measurements

    HP8753E VNA (Full-2-port calibration) has been used in this measurement session. A calibrated coaxial cable has been soldered at the pad corresponding to GE910 RF output; a SMA connector has been soldered to the board in order to characterize the losses of the transmission line including the connector itself.
  • Page 37 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 Line input impedance (in Smith Chart format, once the line has been terminated to 50 load) is shown in the following figure: Insertion Loss of G-CPW line plus SMA connector is shown below: Reproduction forbidden without Telit Communications S.p.A.

  • Page 38: Gsm Antenna - Installation Guidelines

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 6.4. GSM Antenna - Installation Guidelines • Install the antenna in a place covered by the GSM signal. • If the device antenna is located greater then 20cm from the human body and there are no co-located transmitter then the Telit FCC/IC approvals can be re-used by the end product •...

  • Page 39: Logic Level Specifications

    1vv0300962 Rev.4 2012-06-25 Logic level specifications Where not specifically stated, all the interface circuits work at 1.8V CMOS logic levels. The following table shows the logic level specifications used in the GE910 interface circuits: Absolute Maximum Ratings -Not Functional Parameter Input level on any digital pin -0.3V...

  • Page 40: Unconditional Shutdown

    It may only be used to reset a device already on that is not responding to any command. NOTE: Do not use this signal to power off the GE910. Use the ON/OFF signal to perform this function or the AT#SHDN command.

  • Page 41: Serial Ports

    The only configuration that doesn't need a level translation is the 1.8V UART. The serial port on the GE910 is a +1.8V 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 GE910...
  • Page 42 NOTE: In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the GE910 when the module is powered off or during an ON/OFF transition. Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 42 of 73 Mod.

  • Page 43: Rs232 Level Translation

    1vv0300962 Rev.4 2012-06-25 8.2. RS232 level translation In order to interface the GE910 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;...
  • Page 44 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 An example of RS232 level adaptation circuitry could be done using a MAXIM transceiver (MAX218). In this case the chipset is capable to translate directly from 0/1.8V to the RS232 levels (Example done on 4 signals only).

  • Page 45: Usb Port

    10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 USB Port The GE910 includes one integrated universal serial bus (USB) transceiver: • USB 2.0 FS 9.1. USB 2.0 FS This port is compliant with the USB 2.0 specifications.

  • Page 46: Audio Section Overview

    1vv0300962 Rev.4 2012-06-25 Audio Section Overview The Base Band Chip of the GE910 provides one differential input for audio to be transmitted (Uplink) and a balanced BTL output for audio to be received (downlink). The bias for the microphone has to be as clean as possible; the first connection (single ended) is prefearable since the Vmic noise and ground noise are fed into the input as common mode and then rejected.

  • Page 47: Mic Connection

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 10.1. MIC connection Vmic ÷10K 100n MIC+ 2÷5v ÷10u 2.2K INPUT 100n MIC- 33pF 33pF TELIT MODULE If a "balanced way" is anyway desired, much more care has to be taken to Vmic noise and ground noise;...

  • Page 48: Line-In Connection

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 10.2. LINE-IN connection 100n MIC+ 33pF 33pF INPUT 100n MIC- 33pF 33pF LINE_IN+1 Remote_GND TELIT MODULE 100n MIC+ 33pF 33pF INPUT...

  • Page 49: Ear Connection

    MODULE MODULE The audio output of the GE910 is balanced, this is helpful to double the level and to reject common mode (click and pop are common mode and therefore rejected). These outputs can drive directly a small loudspeaker with electrical impedance not lower than 8Ohm.

  • Page 50: Electrical Characteristics

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 10.4. Electrical Characteristics 10.4.1. Input Lines Microphone/Line-in path Line Type Differential Coupling capacitor ≥ 100nF Differential input resistance Levels To have 0dBm0 @1KHz (*)

  • Page 51: Output Lines

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 10.4.2. Output Lines EAR/Line-out Output Direct connection (V =1.3÷1.6V) Differential line coupling One EAR terminal connected via a Single-ended line coupling...

  • Page 52: General Purpose I/O

    . 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 GE910 firmware and acts depending on the function implemented. The following table shows the available GPIO on the GE910 .

  • Page 53: Gpio Logic Levels

    11.1. GPIO Logic levels Where not specifically stated, all the interface circuits work at 1.8V CMOS logic levels. The following table shows the logic level specifications used in the GE910 interface circuits: Absolute Maximum Ratings -Not Functional Parameter Input level on any digital pin -0.3V...

  • Page 54: Using A Gpio Pad As Input

    NOTE: In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the GE910 when the module is powered off or during an ON/OFF transition. 11.3.

  • Page 55: Indication Of Network Service Availability

    Indication of network service availability The STAT_LED pin status shows information on the network service availability and Call status. In the GE910 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.

  • Page 56: Rtc Bypass Out

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 11.5. 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.

  • Page 57: Mounting The Ge910 On Your Board

    10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 Mounting the GE910 on your Board 12.1. General The GE910 modules have been designed in order to be compliant with a standard lead-free SMT process. 12.2. Module finishing & dimensions The GE910 overall dimensions are: •...

  • Page 58: Recommended Foot Print For The Application

    12.3. Recommended foot print for the application In order to easily rework the GE910 is suggested to consider on the application a 1.5mm Inhibit area around the module. It is also suggested, as common rule for an SMT component, to avoid having a mechanical part of the application in direct contact with the module.

  • Page 59: Stencil

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 12.4. Stencil Stencil’s apertures layout can be the same of the recommended footprint (1:1), we suggest a thickness of stencil foil ≥ 120µm.
  • Page 60 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 It is not recommended to place via or micro-via not covered by solder resist in an area of 0.3 mm around the pads unless it carries the same signal of the pad itself (see following figure).

  • Page 61: Solder Paste

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 12.7. Solder paste Lead free Solder paste Sn/Ag/Cu We recommend to use only “no clean” solder paste in order to avoid the cleaning of the modules after assembly.
  • Page 62 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 Profile Feature Profile Feature Profile Feature Profile Feature Pb- - - - Free Ass Free Ass Free Assembly Free Ass embly...

  • Page 63: Debug Of The Ge910 In Production

    Debug of the GE910 in production To test and debug the mounting of the GE910, we strongly recommend to foreseen test pads on the host PCB, in order to check the connection between the GE910 itself and the application and to test the performance of the module connecting it with an external computer.

  • Page 64: Packing System

    14.1. Packing on tray The GE910 modules are packaged on trays of 20 pieces each. These trays can be used in SMT processes for pick & place handling. Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 64 of 73 Mod.
  • Page 65 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 65 of 73 Mod. 0805 2011-07 Rev.2...

  • Page 66: Moisture Sensibility

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 14.2. Moisture sensibility The level of moisture sensibility of the Product is “3”, according with standard IPC/JEDEC J- STD-020, take care of all the relative requirements for using this kind of components.

  • Page 67: Safety Recommandations

    1vv0300962 Rev.4 2012-06-25 Conformity Assessment Issues European Union - Directive 1999/5/EC The GE910-QUAD module has been evaluated against the essential requirements of the 1999/5/EC Directive. Bulgarian С настоящето Telit Communications S.p.A. декларира, че Quad Band GSM/GPRS module отговаря на съществените изисквания и другите приложими изисквания на Директива...
  • Page 68 Härmed intygar Telit Communications S.p.A. att denna Quad Band GSM/GPRS module står I överensstämmelse med de väsentliga egenskapskrav och övriga relevanta bestämmelser som framgår av direktiv 1999/5/EG. In order to satisfy the essential requirements of 1999/5/EC Directive, GE910-QUAD module is compliant with the following standards: RF spectrum use (R&TTE art. 3.2) EN 301 511 V9.0.2...
  • Page 69 The full declaration of conformity can be found on the following address: http://www.telit.com/ There is no restriction for the commercialisation of the GE910-QUAD module in all the countries of the European Union. Final product integrating this module must be assessed against essential requirements of the 1999/5/EC (R&TTE) Directive.
  • Page 70 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 FCC/IC Regulatory notices Modification statement Telit has not approved any changes or modifications to this device by the user. Any changes or modifications could void the user’s authority to operate the equipment.
  • Page 71 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 FCC Class B digital device notice This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
  • Page 72 GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 SAFETY RECOMMANDATIONS READ CAREFULLY Be sure the use of this product is allowed in the country and in the environment required. The...

  • Page 73: Document History

    GE910 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev.4 2012-06-25 Document History Rev.0 2011-11-11 First Release Rev.0 Preliminary 1 Rev.1 2012-02-27 First Release Rev.1 Rev.2 2012-06-07 Added chapter 11.7 ADC Converter – renaming pin RESET# in HW SHUTDOWN* Chapter 5.2 Power consumption...

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