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Telit Communications S p A
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GC864Q2
User Manual
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Telit Communications S p A GC864Q2 User Manual

GC864 QUAD V2 and GC864 DUAL V2 Hardware User Guide

1vv0300874 Rev.0 – 2010-01-25
GC864 Hardware User Guide
1vv0300874 Rev.0 – 2010-01-25

APPLICABILITY TABLE

PRODUCT
GC864-QUAD V2
GC864-DUAL V2
GC864-QUAD V2 with SH
GC864 Hardware User Guide
1vv0300874 Rev.0 – 2010-01-25
DISCLAIMER
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.©
GC864 Hardware User Guide
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Contents
APPLICABILITY TABLE........................................................................................................................................2
1. 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 .....................................................................................................................................8
1.6. RELATED DOCUMENTS..................................................................................................................................8
1.7. DOCUMENT HISTORY ....................................................................................................................................9
2. OVERVIEW...................................................................................................................................... 10
3. GC864 MECHANICAL DIMENSIONS................................................................................................ 11
3.1. MECHANICAL VIEW OF TELIT GC864-QUAD V2 WITH SIM HOLDER.................................................................12
4. GC864-QUAD V2 / GC864-DUAL V2 MODULE CONNECTIONS.......................................................... 13
4.1. PIN-OUT.................................................................................................................................................13
4.1.1. GC864-QUAD V2 / GC864-DUAL V2 Antenna Connector...............................................................16
5. HARDWARE COMMANDS................................................................................................................ 17
5.1. TURNING ON THE GC864-QUAD V2 / GC864-DUAL V2 ..............................................................................17
5.2. TURNING OFF THE GC864-QUAD V2 / GC864-DUAL V2.............................................................................19
5.2.1. Hardware Unconditional Restart ..................................................................................................20
6. POWER SUPPLY............................................................................................................................. 22
6.1. POWER SUPPLY REQUIREMENTS ..................................................................................................................22
6.2. GENERAL DESIGN RULES ............................................................................................................................23
6.2.1. Electrical Design Guidelines .........................................................................................................23
6.2.2. Thermal Design Guidelines...........................................................................................................27
6.2.3. Power Supply PCB Layout Guidelines...........................................................................................28
6.2.4. Parameters for ATEX Applications................................................................................................29
7. ANTENNA ...................................................................................................................................... 31
7.1. GSM ANTENNA REQUIREMENTS ..................................................................................................................31
7.2. GSM ANTENNA – INSTALLATION GUIDELINES................................................................................................32
8. LOGIC LEVEL SPECIFICATIONS...................................................................................................... 33
8.1. RESET SIGNAL...........................................................................................................................................34
9. SERIAL PORTS............................................................................................................................... 35
9.1. MODEM SERIAL PORT ...........................................................................................................................35
9.2. RS232 LEVEL TRANSLATION .......................................................................................................................37
9.3. 5V UART LEVEL TRANSLATION ...................................................................................................................39
10. AUDIO SECTION OVERVIEW........................................................................................................ 41
10.1. SELECTION MODE.......................................................................................................................................41
10.2. ELECTRICAL CHARACTERISTICS....................................................................................................................43
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10.2.1. Input Lines Characteristics ...........................................................................................................43
10.2.2. Output Lines Characteristics.........................................................................................................44
11. GENERAL PURPOSE I/O ............................................................................................................. 46
11.1. GPIO LOGIC LEVELS ..................................................................................................................................47
11.2. USING A GPIO PAD AS INPUT ................................................................................................................48
11.3. USING A GPIO PAD AS OUTPUT .............................................................................................................48
11.4. USING THE RF TRANSMISSION CONTROL GPIO4 .......................................................................................48
11.5. USING THE RFTXMON OUTPUT GPIO5 ...................................................................................................48
11.6. USING THE ALARM OUTPUT GPIO6 ..............................................................................................................49
11.7. USING THE BUZZER OUTPUT GPIO7.........................................................................................................49
11.8. MAGNETIC BUZZER CONCEPTS ................................................................................................................50
11.8.1. Short Description...........................................................................................................................50
11.8.1 Frequency Behavior ............................................................................................................................51
11.8.2. Power Supply Influence.................................................................................................................51
11.8.3. Warning..........................................................................................................................................51
11.8.4. Working Current Influence............................................................................................................52
11.9. USING THE TEMPERATURE MONITOR FUNCTION.........................................................................................52
11.9.1. Short Description...........................................................................................................................52
11.9.2. Allowed GPIO .................................................................................................................................52
11.10. INDICATION OF NETWORK SERVICE AVAILABILITY........................................................................................53
11.11. RTC BYPASS OUT ..................................................................................................................................54
11.12. DAC CONVERTER ..................................................................................................................................55
11.12.1. Description.................................................................................................................................55
11.12.2. Enabling DAC.............................................................................................................................55
11.12.3. Low Pass Filter Example...........................................................................................................56
11.13. ADC CONVERTER ..................................................................................................................................56
11.13.1. Description.................................................................................................................................56
11.13.2. Using ADC Converter.................................................................................................................57
12. ASSEMBLY THE GC864-QUAD V2 / GC864-DUAL V2 ON THE BOARD .......................................... 58
12.1.1. Debug of the GC864-QUAD V2 / GC864-DUAL V2 in Production...................................................59
13. PACKING SYSTEM ...................................................................................................................... 60
14. CONFORMITY ASSESSMENT ISSUES.......................................................................................... 61
15. SAFETY RECOMMENDATIONS .................................................................................................... 63

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 GC864-QUAD V2 / GC864-DUAL V2 module.

1.2. Audience

This document is intended for Telit customers, who are integrators, about to implement their applications using our GC864-QUAD V2 / GC864-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:
GC864 Hardware User Guide
1vv0300874 Rev.0 – 2010-01-25
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.

1.4. Document Organization

This document contains the following chapters:
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Chapter 1: “Introduction” contact and support information, and text conventions.
Chapter 2: “Overview”
Chapter 3: “GC864-QUAD V2 / GC864-DUAL V2 Mechanical Dimensions”
Chapter 4: “GC864-QUAD V2 / GC864-DUAL V2 Module Connections” pin out configuration and layout.
Chapter 5: “Hardware Commands”
Chapter 6: “Power supply”
Chapter 7: “Antenna” important parts in the full product design
Chapter 8: “Logic Level specifications” of logic levels for this module.
Chapter 9: “Serial ports” interface between the module and OEM hardware
Chapter 10: “Audio Section overview” Chip of the GC864 Telit Modules.
Chapter 11: “General Purpose I/O” configured.
Chapter 12 “DAC and ADC Section”
provides a scope for this document, target audience,
provides an overview of the document.
deals with the
How to control the module via hardware.
Power supply requirements and general design rules.
The antenna connection and board layout design are the most
Specific values adopted in the implementation
The serial port on the Telit GC864 is the core of the
Refers to the audio blocks of the Base Band
How the general purpose I/O pads can be
Deals with these two kind of converters.
Chapter 13: “Mounting the GC864-QUAD V2 / GC864-DUAL V2 on the application board” Recommendations and specifics on how to mount the module on the user’s board.

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.
Tip or Information – Provides advice and suggestions that may be useful when
integrating the module.
GC864 Hardware User Guide
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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

1.7. Document History

RReevviissiioonn DDaattee
ISSUE#0 2010-01-25 Release First ISSUE# 0
CChhaannggeess
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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 GC864-QUAD V2 / GC864-DUAL V2 module. For further hardware details that may not be explained in this document refer to the Telit GC864-QUAD V2 / GC864-DUAL V2 Product Description document where all the hardware information is reported.
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NOTICE:
(EN) The integration of the GSM/GPRS GC864-QUAD V2 / GC864-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.
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 10 of 64

3. GC864 Mechanical Dimensions

The Telit GC864-QUAD V2 / GC864-DUAL V2 module overall dimensions are:
• Length: 36.2 mm
• Width: 30 mm
• Thickness: 3.2 mm
• Weight: 4.8g
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3.1. Mechanical View of Telit GC864-QUAD V2 with SIM Holder

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4. GC864-QUAD V2 / GC864-DUAL V2 Module Connections

4.1. PIN-OUT

The GC864-QUAD V2 / GC864-DUAL V2 uses a 80 pin Molex p.n. 53949-0878 male connector for the connections with the external applications. This connector matches the 54150-0878 models.
Pin Signal I/O Function
Power Supply
1 VBATT - Main power supply Power
2 VBATT - Main power supply Power
3 VBATT - Main power supply Power
4 VBATT - Main power supply Power
5 GND - Ground Power
6 GND - Ground Power
7 GND - Ground Power
Audio
8 AXE I Handsfree switching 100KΩ CMOS 2.8V
9 EAR_HF+ AO Handsfree ear output, phase + Audio
10 EAR_HF- AO Handsfree ear output, phase - Audio
11 EAR_MT+ AO Handset earphone signal output, phase + Audio
12 EAR_MT- AO Handset earphone signal output, phase - Audio
13 MIC_HF+ AI Handsfree microphone input; phase Audio
14 MIC_HF- AI Handsfree microphone input; phase Audio
15 MIC_MT+ AI Handset microphone signal input; phase+ Audio
16 MIC_MT- AI Handset microphone signal input; phase- Audio
SIM Card Interface
181 SIMVCC - External SIM signal – Power supply for the SIM 1.8 / 3V
19 SIMRST O External SIM signal – Reset 1.8 / 3V
20 SIMIO I/O External SIM signal - Data I/O 1.8 / 3V
21 SIMIN I External SIM signal - Presence (active low) 47KΩ 1.8 / 3V
22 SIMCLK O External SIM signal – Clock 1.8 / 3V
Trace
23 RX_TRACE I RX Data for debug monitor CMOS 2.8V
24 TX_TRACE O TX Data for debug monitor CMOS 2.8V
Internal Pull up
Type
1
On this line a maximum of 10nF bypass capacitor is allowed
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Pin Signal I/O Function
Servicepinshallbeusedtoupgradethe modulefromASC1(RX_TRACE,
47 SERVICE I
Prog. / Data + Hw Flow Control
25 C103/TXD I Serial data input (TXD) from DTE CMOS 2.8V
26 C104/RXD O Serial data output (RXD) to DTE CMOS 2.8V
27 C107/DSR O Output for Data set ready signal (DSR) to DTE CMOS 2.8V
28 C106/CTS O Output for Clear to send signal (CTS) to DTE CMOS 2.8V
29 C108/DTR I Input for Data terminal ready signal (DTR) from DTE CMOS 2.8V
30 C125/RING O Output for Ring indicator signal (RI) to DTE CMOS 2.8V
31 C105/RTS I Input for Request to send signal (RTS) from DTE CMOS 2.8V
32 C109/DCD O Output for Data carrier detect signal (DCD) to DTE CMOS 2.8V
DAC and ADC
37 ADC_IN1 AI Analog/Digital converter input A/D
38 ADC_IN2 AI Analog/Digital converter input A/D
39 ADC_IN3 AI Analog/Digital converter input A/D
40 DAC_OUT AO Digital/Analog converter output D/A
Miscellaneous Functions
45 STAT_LED O Status indicator led CMOS 1.8V
46 GND - Ground Ground
49 PWRMON O Power ON Monitor CMOS 2.8V
53 ON/OFF* I
54 RESET* I Reset input
55 VRTC AO VRTC Backup capacitor Power
Telit GPIO / DVI
36 DVI_CLK - DVI_CLK (Digital Voice Interface Clock) CMOS 2.8V
59 TGPIO_04/TXCNTRL I/O Telit GPIO4 Configurable GPIO / RF Transmission Control CMOS 2.8V
63 TGPIO_10/DVI_TX I/O Telit GPIO10 Configurable GPIO / DVI_TX (Digital Voice Interface) CMOS 2.8V
65 DVI_RX I/O DVI_RX (Digital Voice Interface) CMOS 2.8V
66 TGPIO_03 I/O Telit GPIO3 Configurable GPIO CMOS 2.8V
67 TGPIO_08 I/O Telit GPIO8 Configurable GPIO CMOS 2.8V
68 TGPIO_06 / ALARM I/O Telit GPIO6 Configurable GPIO / ALARM CMOS 2.8V
70 TGPIO_01 I/O Telit GPIO1 Configurable GPIO CMOS 2.8V
71 DVI_WAO I/O DVI_WAO (Digital Voice Interface) CMOS 2.8V
73 TGPIO_07 / BUZZER I/O Telit GPIO7 Configurable GPIO / Buzzer CMOS 2.8V
74 TGPIO_02 / JDR I/O Telit GPIO02 I/O pin / Jammer detect report CMOS 2.8V
76 TGPIO_09 I/O Telit GPIO9 Configurable GPIO CMOS 2.8V
78 TGPIO_05/ RFTXMON I/O Telit GPIO05 Configurable GPIO / Transmitter ON monitor CMOS 2.8V
TX_TRACE). Thepinshallbetiedlowtoenablethefeature onlyincaseofa SWUpdateactivity.Itis required,fordebugpurpose,tobeconnected toatestpadonthefinalapplication.
Input command for switching power ON or OFF (toggle command). The pulse to be sent to the GC864-QUAD V2 / GC864-DUAL V2 must be equal or greater than 1 second.
Internal Pull up
CMOS 2.8V
47KΩ Pull up to VBATT
Type
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Pin Signal I/O Function
RESERVED
17 Reserved -
33 Reserved -
34 Reserved -
35 Reserved -
41 Reserved -
42 Reserved -
43 Reserved -
44 Reserved -
48 Reserved
50 Reserved -
51 Reserved
52 Reserved
56 Reserved
57 Reserved
58 Reserved
60 Reserved
61 Reserved
62 Reserved
64 Reserved
69 Reserved -
72 Reserved
75 Reserved
77 Reserved
79 Reserved -
80 Reserved -
-
-
-
-
-
-
-
-
-
-
-
-
-
Internal Pull up
Type
NOTE:
The GC864-QUAD V2 / GC864-DUAL V2 Modules has one DVI ports on the system interface.
NOTE:
Reserved pins must not be connected.
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NOTE:
RTS must be connected to the GND (on the module side) if flow control is not used.
NOTE:
If not used, almost all pins must be left disconnected. The only exceptions are the following pins:
Pin Signal Function
1 VBATT Main power supply
2 VBATT Main power supply
3 VBATT Main power supply
4 VBATT Main power supply
5 GND Ground
6 GND Ground
7 GND Ground
46 GND Ground
25 C103/TXD Serial data input (TXD) from DTE
26 C104/RXD Serial data output to DTE
31 C105/RTS Input for Request to send signal (RTS) from DTE
53 ON/OFF* Input command for switching power ON or OFF (toggle command).
54 RESET* Reset input
23 RX_TRACE RX Data for debug monitor
24 TX_TRACE TX Data for debug monitor
47 SERVICE SERVICE connection

4.1.1. GC864-QUAD V2 / GC864-DUAL V2 Antenna Connector

The GC864-QUAD V2 / GC864-DUAL V2 module is equipped with a 50 RF connector from Murata, GSC type P/N MM9329-2700B. The counterpart suitable is Murata MXTK92 Type or MXTK88 Type.
Moreover, the GC864-QUAD V2 / GC864-DUAL V2 has the antenna pads on the back side of the PCB. This allows the manual soldering of the coaxial cable directly on the back side of the PCB. However, the soldering is not an advisable solution for a reliable connection of the antenna.
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GC864 Hardware User Guide
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5. Hardware Commands

5.1. Turning ON the GC864-QUAD V2 / GC864-DUAL V2

To turn the GC864-QUAD V2 / GC864-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:
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:
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 GC864-QUAD V2 / GC864-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.
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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:
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GC864 Hardware User Guide
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5.2. Turning OFF the GC864-QUAD V2 / GC864-DUAL V2

Turning off of the device can be done in three ways:
• by software command (see GC864-QUAD V2 / GC864-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 GC864 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:
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.
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved. Page 19 of 64

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 GC864-QUAD V2 / GC864-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:
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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 GC864-QUAD V2 / GC864­DUAL V2 power regulator and improper functioning of the module. The line RESET* must be connected only in open collector configuration.
TIP:
The unconditional hardware reboot must always be implemented on the boards and the software must use it as an emergency exit procedure.
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