Telit Wireless Solutions GM862-GPS Design Manual
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Telit Wireless Solutions GM862-GPS Design Manual

Sim integration
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SIM integration design guide
8000NT10001a Rev.9 – 2012-06-19

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Summary of Contents for Telit Wireless Solutions GM862-GPS

  • Page 1 SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19...
  • Page 2 SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 APPLICABILITY TABLE PRODUCT GM862-GPS GC864-QUAD V2 GC864-DUAL V2 UC864-E UC864-G UC864-WD UC864-WDU GE863-GPS GE863-SIM GE863-PRO GE864-QUAD V2 GE864-DUAL V2 GE864-QUAD AUTOMOTIVE V2 GE864-QUAD ATEX GE865-QUAD GL865-DUAL/QUAD GE864-GPS HE910 GE910 Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved.
  • Page 3 SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 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 SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 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

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 Contents Introduction ..........................6 1.1. Scope ............................6 1.2. Audience ..........................6 1.3. Contact Information, Support ....................6 1.4. Document Organization ......................7 1.5. Text Conventions ........................7 1.6. Related Documents ......................... 8 Overview ............................

  • Page 6: Introduction

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 Introduction 1.1. Scope Aim of this document is to give basic design guide lines to integrate a SIM holder in applications that uses Telit modules. 1.2. Audience This document is intended for Telit customers, who are integrators, about to add SIM holder functionality on their applications.

  • Page 7: Document Organization

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 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 a quick SIM contacts explanation. Chapter 3: “Schematics “...

  • Page 8: Related Documents

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 1.6. Related Documents • GM862 Family Hardware User Guide, 1vv0300794 • GC864 Hardware User Guide, 1vv0300733 • GE863 Family Hardware User Guide, 1vv0300783 • GE864 Hardware User Guide, 1vv0300694 • GE865 Hardware User Guide, 1vv0300799 •...

  • Page 9: Overview

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 Overview In all Telit modules there are five pins for SIM card holder connection; these lines are: SIMVCC (SIM Power supply) SIMRST (SIM Reset) SIMIO (SIM Data) SIMIN (SIM Presence/Absence) SIMCLK (SIM Clock) SIM connection design must take in account these general rules: Data Integrity: standard rules for digital layout and routing must be followed taking in consideration that SIMCLK has frequency of 3.57 MHz and SIMIO baud rate is greater or...
  • Page 10 SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 NOTE: SIM card is detected inserted when SIMIN line is shorted to ground. If in the application the SIM holder doesn’t foresee the switch for the presence/absence of the SIM card, the SIMIN line must be connected to ground. NOTE: On GL865 there isn’t a dedicated SIMIN pin.

  • Page 11: Schematics

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 Schematics This section deals with the recommended schematics for the design of SIM interfaces on the application boards. 3.1. SIM Schematic example Figure 1 illustrates in particular how the application side should be designed, and what values the components should have.

  • Page 12: 3.2. Component's Values

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 3.2. Component’s Values Values reported on Table 1 are based on the UC864-E/G/WD/WDU used in conjunction with the Telit EVK and representing the deviation by R1 regarding the rise time and the fall time of SIMIO signal.

  • Page 13: Pcb Layout

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 PCB Layout In this section general rules are given on how to place and connect the components on the PCB in order to obtain the better results on the EMI side. The placement of the 33 pF filtering capacitors is very important in order to maximize their effectiveness;...

  • Page 14: Esd Protection

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 ESD Protection WARNING: Do use TVS diodes or varistors to protect Telit modules from Electrostatic discharge. 5.1. ESD protection for SIM interface The following schematics (Figure 5) are recommended for the SIM interface. A single TVS diode or varistor can be used on the respective pins and the VTS should clamp at 3.5V and the total capacity on each line shall be maximum 33pF.

  • Page 15: Dual Sim Selection

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 Dual SIM selection The Telit modules can already support more than one SIM card. The SIM selection circuit, described below, can be applied to our GSM/GPRS and UC864 modules that provide 2.8V GPIOs.
  • Page 16 SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 To enable SIM B: AT#GPIO=X,1,1 AT#GPIO=Z,0,1 AT#GPIO=Y,1,1 AT#SIMDET=0 (5 seconds of pause) AT#SIMDET=2 If the user doesn't need SIM hot removal he can ground SIMIN pin on module side as showed in the example schematic in Figure 7 Figure 7 In this case the AT command sequence change a little as AT#SIMDET has to be set to 1 and not to 2:...
  • Page 17 SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 To enable SIM B: AT#GPIO=X,1,1 AT#GPIO=Z,0,1 AT#GPIO=Y,1,1 AT#SIMDET=0 (5 seconds of pause) AT#SIMDET=1 NOTE: These solutions cannot be applied to devices with only 1.8V GPIO such as HE910, since they cannot correctly drive the Mosfet on SIMVCC. For 1.8V GPIO devices either a level shifter is required or we suggest using a dedicated component such as the FSA2567 low power dual SIM Card analog switch as shown in the following example.
  • Page 18 SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 NOTE: This solution cannot be applied to GM862 and GC864 with SIM holder when internal SIM holder is used. Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved. Page 18 of 22 Mod.

  • Page 19: Sim-On-Chip

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 SIM-On-Chip In the M2M applications, there are several cases where the SIM Card will never be changed once installed, also it would be preferable if it shouldn’t be possible to remove it at all; furthermore the SIM Card is required to work in a more harsh environment with respect to standard mobile phones SIM Cards.
  • Page 20 SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 Since the SIM On Chip are not removable, it is possible to tie SIMIN to GND and eventually use the AT command AT#SIMDET to simulate insertion/removal. Furthermore if the SIM On Chip is shielded inside the application box and cannot be subject to ESD discharges, the ESD protections can be omitted.

  • Page 21: List Of Acronyms

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 List of acronyms SIM: Subscriber Identity Module EMI: Electromagnetic Interference Electromagnetic Compatibility EMC: Electrostatic Discharge ESD: Machine to Machine Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights Reserved. Page 21 of 22 Mod.

  • Page 22: Document History

    SIM integration design guide 8000NT10001a Rev.9 – 2012-06-19 Document History ISSUE#0 2006-09-29 Release First ISSUE# 0 ISSUE#1 2007-09-04 Updated applicability table ISSUE#2 2009-05-29 Applied new layout Updated applicability table ISSUE#3 2010-09-01 Updated capacitor value on SIMVCC Updated applicability table ISSUE#4 2010-10-04 Added GL865-DUAL to applicability table ISSUE#5...

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