Telit Wireless Solutions GL865 QUAD Hardware User's Manual

Brand: Telit Wireless Solutions

Model: GL865 QUAD

Type: Hardware User's Manual

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

APPLICABILITY TABLE

PRODUCT

GL865 QUAD

GL865 DUAL

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

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. The information in this document has been carefully checked and is

believed to be entirely reliable. However, no responsibility is assumed for inaccuracies or

omissions. Telit reserves the right to make changes to any products described herein and

reserves the right to revise this document and to make changes from time to time in content

hereof with no obligation to notify any person of revisions or changes. Telit does not assume

any liability arising out of the application or use of any product, software, or circuit described

herein; neither does it convey license under its patent rights or the rights of others.

It is possible that this publication may contain references to, or information about Telit products

(machines and programs), programming, or services that are not announced in your country.

Such references or information must not be construed to mean that Telit intends to announce

such Telit products, programming, or services in your country.

Copyrights

This instruction manual and the Telit products described in this instruction manual may be,

include or describe copyrighted Telit material, such as computer programs stored in

semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit

and its licensors certain exclusive rights for copyrighted material, including the exclusive right

to copy, reproduce in any form, distribute and make derivative works of the copyrighted

material. Accordingly, any copyrighted material of Telit and its licensors contained herein or in

the Telit products described in this instruction manual may not be copied, reproduced,

distributed, merged or modified in any manner without the express written permission of Telit.

Furthermore, the purchase of Telit products shall not be deemed to grant either directly or by

implication, estoppel, or otherwise, any license under the copyrights, patents or patent

applications of Telit, as arises by operation of law in the sale of a product.

Computer Software Copyrights

The Telit and 3rd Party supplied Software (SW) products described in this instruction manual

may include copyrighted Telit and other 3rd Party supplied computer programs stored in

semiconductor memories or other media. Laws in the Italy and other countries preserve for Telit

and other 3rd Party supplied SW certain exclusive rights for copyrighted computer programs,

including the exclusive right to copy or reproduce in any form the copyrighted computer

program. Accordingly, any copyrighted Telit or other 3rd Party supplied SW computer programs

contained in the Telit products described in this instruction manual may not be copied (reverse

engineered) or reproduced in any manner without the express written permission of Telit or the

3rd Party SW supplier. Furthermore, the purchase of Telit products shall not be deemed to grant

either directly or by implication, estoppel, or otherwise, any license under the copyrights,

patents or patent applications of Telit or other 3rd Party supplied SW, except for the normal

non-exclusive, royalty free license to use that arises by operation of law in the sale of a product.

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

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.

Copyrighted Materials

Software and documentation are copyrighted materials. Making unauthorized copies is

prohibited by law. No part of the software or documentation may be reproduced, transmitted,

transcribed, stored in a retrieval system, or translated into any language or computer language,

in any form or by any means, without prior written permission of Telit

High Risk Materials

Components, units, or third-party products used in the product described herein are NOT fault-

tolerant and are NOT designed, manufactured, or intended for use as on-line control equipment

in the following hazardous environments requiring fail-safe controls: the operation of Nuclear

Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life

Support, or Weapons Systems (High Risk Activities"). Telit and its supplier(s) specifically

disclaim any expressed or implied warranty of fitness for such High Risk Activities.

Trademarks

TELIT and the Stylized T Logo are registered in Trademark Office. All other product or service

names are the property of their respective owners.

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

Contents

1. INTRODUCTION ........................................................................................................................................................... 7

1.1. SCOPE ....................................................................................................................................................................... 7

1.2. AUDIENCE ................................................................................................................................................................. 7

1.3. CONTACT INFORMATION, SUPPORT ........................................................................................................................... 7

1.4. DOCUMENT ORGANIZATION ..................................................................................................................................... 8

1.5. TEXT CONVENTIONS ................................................................................................................................................. 9

1.6. RELATED DOCUMENTS ............................................................................................................................................. 9

2. OVERVIEW .................................................................................................................................................................. 10

3. GL865 MECHANICAL DIMENSIONS ..................................................................................................................... 11

4. GL865 MODULE CONNECTIONS ........................................................................................................................... 12

4.1. PIN-OUT ................................................................................................................................................................ 12

4.2. PIN LAYOUT ............................................................................................................................................................ 15

5. HARDWARE COMMANDS ....................................................................................................................................... 16

5.1. AUTO-TURNING ON THE GL865 ............................................................................................................................. 16

5.2. TURNING OFF THE GL865 ...................................................................................................................................... 18

5.3. RESETTING THE GL865 ........................................................................................................................................... 20

5.3.1. Hardware Unconditional restart ................................................................................................................... 20

6. POWER SUPPLY ......................................................................................................................................................... 22

6.1. POWER SUPPLY REQUIREMENTS ............................................................................................................................. 22

6.2. POWER CONSUMPTION ............................................................................................................................................ 22

6.3. GENERAL DESIGN RULES ........................................................................................................................................ 23

6.3.1. Electrical Design Guidelines ......................................................................................................................... 24

6.3.2. Thermal Design Guidelines ........................................................................................................................... 28

6.3.3. Power Supply PCB layout Guidelines ........................................................................................................... 29

7. ANTENNA ..................................................................................................................................................................... 30

7.1. GSM ANTENNA REQUIREMENTS ............................................................................................................................ 30

7.1.1. GL865 Antenna – PCB line Guidelines ......................................................................................................... 30

7.2. PCB GUIDELINES IN CASE OF FCC CERTIFICATION ................................................................................................. 31

7.2.1. Transmission line design ............................................................................................................................... 31

7.2.2. Transmission line measurements ................................................................................................................... 32

7.3. GSM ANTENNA - INSTALLATION GUIDELINES ........................................................................................................ 35

8. LOGIC LEVEL SPECIFICATIONS .......................................................................................................................... 36

8.1. RESET SIGNAL ......................................................................................................................................................... 37

9. SERIAL PORTS ........................................................................................................................................................... 38

9.1. MODEM SERIAL PORT ....................................................................................................................................... 38

9.2. RS232 LEVEL TRANSLATION ................................................................................................................................... 40

9.3. ....................................................................................................................................................................................... 42

9.4. 5V UART LEVEL TRANSLATION ............................................................................................................................. 43

10. AUDIO SECTION OVERVIEW ............................................................................................................................ 45

10.1. ELECTRICAL CHARACTERISTICS ............................................................................................................................. 48

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10.1.1. Input Lines ..................................................................................................................................................... 48

10.1.2. Output Lines .................................................................................................................................................. 49

11. GENERAL PURPOSE I/O ...................................................................................................................................... 50

11.1. GPIO LOGIC LEVELS ............................................................................................................................................... 51

11.2. USING A GPIO PAD AS INPUT ............................................................................................................................... 51

11.3. USING A GPIO PAD AS OUTPUT ........................................................................................................................... 52

11.4. USING THE RF TRANSMISSION CONTROL GPIO4 .................................................................................................... 52

11.5. USING THE RFTXMON OUTPUT GPIO5 ................................................................................................................ 52

11.6. USING THE ALARM OUTPUT GPIO6 ........................................................................................................................ 53

11.7. USING THE BUZZER OUTPUT GPIO7 ....................................................................................................................... 53

11.8. MAGNETIC BUZZER CONCEPTS ............................................................................................................................... 53

1.1.1 Short Description ................................................................................................................................................... 53

11.8.1. Frequency Behaviour .................................................................................................................................... 54

11.8.2. Power Supply Influence ................................................................................................................................. 54

11.8.3. Working Current Influence ............................................................................................................................ 55

11.9. STAT LED INDICATION OF NETWORK SERVICE AVAILABILITY............................................................................... 55

11.10. SIMIN DETECT FUNCTION .................................................................................................................................. 57

11.11. RTC BYPASS OUT ............................................................................................................................................... 58

11.12. SIM HOLDER IMPLEMENTATION ........................................................................................................................ 58

12. DAC AND ADC SECTION ..................................................................................................................................... 59

12.1. DAC CONVERTER ................................................................................................................................................... 59

12.1.1. Description .................................................................................................................................................... 59

12.1.2. Enabling DAC ............................................................................................................................................... 60

12.1.3. Low Pass Filter Example ............................................................................................................................... 60

12.2. ADC CONVERTER ................................................................................................................................................... 61

12.2.1. Description .................................................................................................................................................... 61

12.2.2. Using ADC Converter ................................................................................................................................... 61

12.3. DEBUG OF THE GL865 IN PRODUCTION ................................................................................................................... 62

13. MOUNTING THE GL865 ON YOUR BOARD .................................................................................................... 63

13.1. GENERAL ................................................................................................................................................................ 63

13.2. MODULE FINISHING & DIMENSIONS ........................................................................................................................ 63

13.3. RECOMMENDED FOOT PRINT FOR THE APPLICATION ................................................................................................ 64

13.4. SOLDER PASTE ........................................................................................................................................................ 65

13.4.1. GL865 Solder reflow ..................................................................................................................................... 65

14. PACKING SYSTEM ................................................................................................................................................ 67

14.1. MOISTURE SENSIBILITY ........................................................................................................................................... 68

15. CONFORMITY ASSESSMENT ISSUES .............................................................................................................. 69

16. SAFETY RECOMMANDATIONS ......................................................................................................................... 70

17. DOCUMENT HISTORY ......................................................................................................................................... 71

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

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 GL865 module.

1.2. Audience

This document is intended for Telit customers, who are integrators, about to implement their

applications using our GL865 modules.

1.3. Contact Information, Support

For general contact, technical support, to report documentation errors and to order manuals,

contact Telit’s Technical Support Center (TTSC) at:

TS-[email protected]om

TS-NORTHAMERICA@telit.com

TS-LATINAMERICA@telit.com

TS-[email protected]

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.

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

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: “GL865 Mechanical Dimensions”

Chapter 4: “GL865 Module Connections

” deals with the pin out configuration and layout.

Chapter 5: “Hardware Commands”

How to operate on 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 GL865 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

GL865 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 GL865 on the application board”

Recommendations and specifics on

how to mount the module on the user’s board.

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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.

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

• GL865 Product description, 80370ST10080a

• SIM Holder Design Guides, 80000NT10001a

• AT Commands Reference Guide, 80000ST10025a

• Telit EVK2 User Guide, 1vv0300704

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

2. Overview

The aim of this document is the description of some hardware solutions useful for developing a

product with the Telit GL865 module.

In this document all the basic functions of a mobile phone will be taken into account; for each

one of them a proper hardware solution will be suggested and eventually the wrong solutions

and common errors to be avoided will be 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 GL865 module. For further hardware

details that may not be explained in this document refer to the Telit GL865 Product Description

document where all the hardware information is reported.

NOTICE:

The integration of the GSM/GPRS GL865 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, nor 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.

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

3. GL865 Mechanical Dimensions

The GL865 overall dimensions are:

• Length: 24.4 mm

• Width: 24.4 mm

• Thickness: 2.7 mm

• Weight 2.48 g

GL865 Hardware User Guide

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4. GL865 module connections

4.1. PIN-OUT

Pad Signal I/O Function Note Type

Audio

EAR- AO Earphone signal output, phase - Audio

EAR+ AO Earphone signal output, phase + Audio

MIC- AI Mic.signal input; phase- Audio

MIC+ AI Mic.signal input; phase+ Audio

AGND - Analog Ground -

SIM card interface

SIMVCC - External SIM signal – Power supply for the SIM 1,8 / 3V

SIMRST O External SIM signal – Reset 1,8 / 3V

SIMCLK O External SIM signal – Clock 1,8 / 3V

SIMIO I/O External SIM signal – Data I/O

4.7K Pull

1,8 / 3V

All GPI0

can be

program

med

SIMIN I

Presence SIM input

(See para 11.9)

CMOS 2.8V

Trace

RX_AUX I Auxiliary UART (RX Data) CMOS 2.8V

TX_AUX O Auxiliary UART (TX Data) CMOS 2.8V

Prog. / Data + HW Flow Control

C109/DCD/GPO O

Output for Data carrier detect signal (DCD) to DTE

/ GP output

CMOS 2.8V

C125/RING/GPO O

Output for Ring indicator signal (RI) to DTE

/ GP output

CMOS 2.8V

C107/DSR/GPO O

Output for Data set ready signal (DSR) to DTE

/ GP output

CMOS 2.8V

C108/DTR/GPI I

Input for Data terminal ready signal (DTR) from DTE

/ GP input

CMOS 2.8V

C105/RTS/GPI I

Input for Request to send signal (RTS) from DTE

/ GP input

CMOS 2.8V

C106/CTS/GPO O

Output for Clear to send signal (CTS) to DTE

/ GP output

CMOS 2.8V

C103/TXD I Serial data input (TXD) from DTE CMOS 2.8V

C104/RXD O Serial data output to DTE CMOS 2.8V

DAC and ADC

ADC_IN1 AI Analog/Digital converter input A/D

ADC_IN2 AI Analog/Digital converter input A/D

DAC_OUT AO Digital/Analog converter output D/A

Miscellaneous Functions

VRTC AO VRTC Backup Power

RESET* I Reset input CMOS 1.8V

V_AUX / PWRMON O

2.8V stabilized output Imax=100mA

/ Power ON monitor

Power Out 2.8V

GL865 Hardware User Guide

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Pad Signal I/O Function Note Type

Antenna O Antenna output – 50 Ω RF

GPIO

GPIO_01 / DVI_WA0 I/O

GPIO01 Configurable GPIO

/ Digital Audio Interface (WA0)

CMOS 2.8V

GPIO_02 / JDR /

DVI_RX

I/O

GPIO02 Configurable GPIO / Jammer Detect Report

/ Digital Audio Interface (RX)

CMOS 2.8V

GPIO_03 / DVI_TX I/O

GPIO03 Configurable GPIO

/ Digital Audio Interface (TX)

CMOS 2.8V

GPIO_04 / TX Disable

/ DVI_CLK

I/O

GPIO04 Configurable GPIO / TX Disable input

/ Digital Audio Interface (CLK)

CMOS 2.8V

GPIO_05 / RFTXMON I/O

GPIO05 Configurable GPIO

/ Transmitter ON monitor

CMOS 2.8V

GPIO_06 / ALARM I/O

GPIO06 Configurable GPIO

/ ALARM

CMOS 2.8V

GPIO_07 / BUZZER I/O

GPIO07 Configurable GPIO

/ Buzzer

CMOS 2.8V

GPIO_08 / STAT_LED I/O

GPIO08 Configurable GPIO

/ STAT LED

CMOS 2.8V

Power Supply

VBATT - Main power supply (Baseband) Power

VBATT_PA - Main power supply (Radio PA) Power

AGND - AF Signal Ground (see audio section) AF Signal

GND - Ground Power

RESERVED

WARNING:

Reserved pins must not be connected.

NOTE:

GL865 Hardware User Guide

1vv0300910 Rev.3 – 2011-10-03

If not used, almost all pins should be left disconnected. The only exceptions are the following

pins:

signal

38, 37

VBATT & VBATT_PA

32, 33, 35, 36, 46

GND

AGND

TXD

8 RXD

RTS

V_AUX / PWRMON

RESET*

TX_AUX

RX_AUX

GL865 Hardware User Guide

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4.2. Pin Layout

TOP VIEW

NOTE:

The pin defined as NC/RFU has to be considered RESERVED and don’t connect on any pin in

the application.

GL865 Hardware User Guide

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5. Hardware Commands

5.1. Auto-Turning ON the GL865

To Auto-turn on the GL865, the power supply must be applied on the power pins VBATT and

VBATT_PA, after 1000 m-seconds, the

V_AUX / PWRMON pin will be at the high logic level

and the module can be consider fully operating.

When the power supply voltage is lower than 3.4V, after 5000 m-seconds, the

V_AUX /

PWRMON

pin will be at the high logic level and the module can be consider fully operating.

The following flow chart shows the proper turn on procedure:

Modem ON Proc

PWR supply = ON?

Delay 1s - 5s for Low

Voltage Operating

Modem Reset Proc.

AT init sequence

Start AT CMD

PWMON = ON?

Delay 300mS

Enter AT<CR>

AT answer in

1second ?

Delay 1s

GL865 Hardware User Guide

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NOTE:

The power supply on the pins VBATT and VBATT_PA must be applied at the same time or for

the special application in the first apply the VBATT_PA and in second time apply VBATT,

never vice versa in this case can be damage the unit.

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 GL865 when the module is powered OFF or during

an ON/OFF transition.

A flow chart showing the AT command managing procedure is displayed below:

Modem ON Proc.

Disconnect PWR

supply

AT init

sequence.

Delay 300mS

Enter AT<CR>

AT answer in

1second ?

Start AT CMD

GL865 Hardware User Guide

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5.2. Turning OFF the GL865

Turning off of the device can be done in two ways:

• General turn OFF

• Processor turn OFF

General turn OFF – disconnect the power supply from the both power pins VBATT and

VBATT_PA at the same time. In this case all parts of the module are in OFF condition, any

power consumption is present.

Processor turn OFF – disconnect the power supply only from the power pin VBATT, the power

pin VBATT_PA can be connected to power supply, in this case a low, typical 2uA max 20uA,

power consumption is present.

Before any of both OFF procedure will be applied, the AT#SYSHALT AT command must be

send (see AT Commands Reference Guide, 80000ST10025a), after the OK response message,

check the

V_AUX / PWRMON pin, when the logic level is low the module can be consider fully

not operating and at this moment is possible disconnect the Power Supply.

The following flow chart shows the proper turnoff procedure:

GL865 Hardware User Guide

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TIP:

To check if the device has been powered off, the hardware line PWRMON must be monitored.

The device is powered off when PWRMON goes low.

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 GL865 when the module is powered OFF or during

an ON/OFF transition.

Modem OFF

Proc.

PWRMON = OFF?

Place AT command

AT#SYSHALT

Disconnect PWR

supply

Disconnect PWR

supply

Wait

PWRMON =OFF

15s timeout

Modem ON Proc

Delay 1.5s

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5.3. Resetting the GL865

5.3.1. 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 reboot the GL865, the pad RESET* must be tied low for at least 200

milliseconds and then released.

NOTE:

Do not use any pull up resistor on the RESET* line nor any totem pole digital output. Using pull

up resistor may bring to latch up problems on the GL865 power regulator and improper

functioning of the module. The line RESET* must be connected only in open collector

configuration; the transistor must be connected as close as possible to the RESET* pin.

TIP:

The unconditional hardware restart must always be implemented on the boards and the software

must use it as an emergency exit procedure.

A simple circuit to do it is:

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Telit Wireless Solutions GL865 QUAD Hardware User's Manual

Telit Wireless Solutions GL865 QUAD Hardware User's Manual

Telit Wireless Solutions GL865 QUAD Hardware User's Manual

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