Telit Communications S p A GL865Q User Manual

1vv0300910

Rev.

1 – 2011-07-22

GL865 Hardware User Guide

1vv0300910 Rev.1 – 2011-07-22

APPLICABILITY TABLE

PRODUCT

GL865 QUAD GL865 DUAL

GL865 Hardware User Guide

1vv0300910 Rev.1 – 2011-07-22

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 application note.

GL865 Hardware User Guide

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Contents

1. INTRODUCTION ......................................................................................................................................................... 6

1.1. S

1.2. A

1.3. C

1.4. D

1.5. T

1.6. R

1.7. D

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

3. GL865 MECHANICAL DIMENSIONS .......................................................................................................................... 12

4. GL865 MODULE CONNECTIONS ............................................................................................................................... 13

4.1. PIN-OUT .................................................................................................................................................................. 13

4.2. P

5. HARDWARE COMMANDS ........................................................................................................................................ 17

5.1. A

5.2. T

5.3. R

6. POWER SUPPLY ....................................................................................................................................................... 23

6.1. P

6.2. P

6.3. G

COPE

......................................................................................................................................................................... 6

UDIENCE

.................................................................................................................................................................... 6

ONTACT INFORMATION, SUPPORT

OCUMENT ORGANIZATION

EXT CONVENTIONS

ELATED DOCUMENTS

OCUMENT HISTORY

IN LAYOUT

UTO-TURNING ON THE

URNING

ESETTING THE

5.3.1.

OWER SUPPLY REQUIREMENTS

OWER CONSUMPTION

ENERAL DESIGN RULES

6.3.1.

6.3.2.

6.3.3.

............................................................................................................................................................... 16

OFF

THE

GL865 ................................................................................................................................................ 21

Hardware Unconditional restart .................................................................................................................... 21

Electrical Design Guidelines ........................................................................................................................... 25

Thermal Design Guidelines ............................................................................................................................ 29

Power Supply PCB layout Guidelines ............................................................................................................. 30

.................................................................................................................................. 6

............................................................................................................................................ 6

....................................................................................................................................................... 7

................................................................................................................................................... 8

..................................................................................................................................................... 8

GL865 ................................................................................................................................... 17

GL865 ........................................................................................................................................... 19

..................................................................................................................................... 23

................................................................................................................................................ 24

............................................................................................................................................... 25

7. ANTENNA ................................................................................................................................................................ 32

7.1. GSM A

7.2. GSM A

7.3. GSM A

8. LOGIC LEVEL SPECIFICATIONS .................................................................................................................................. 38

8.1. R

9. SERIAL PORTS .......................................................................................................................................................... 41

9.1. MODEM SERIAL PORT ............................................................................................................................................. 41

9.2. RS232

9.3. ................................................................................................................................................................................ 46

9.4. 5V UART

10. AUDIO SECTION OVERVIEW ................................................................................................................................ 49

NTENNA REQUIREMENTS

NTENNA -

NTENNA - INSTALLATION GUIDELINES

ESET SIGNAL

LEVEL TRANSLATION

PCB

LINE GUIDELINES

............................................................................................................................................................. 39

.......................................................................................................................................... 43

LEVEL TRANSLATION

.................................................................................................................................... 32

.......................................................................................................................... 33

................................................................................................................... 37

...................................................................................................................................... 47

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10.1. E

LECTRICAL CHARACTERISTICS

10.1.1. Input Lines ..................................................................................................................................................... 52

10.1.2. Output Lines................................................................................................................................................... 53

........................................................................................................................................ 52

11. GENERAL PURPOSE I/O ....................................................................................................................................... 55

11.1. GPIO L

11.2. U

11.3. U

11.4. U

11.5. U

11.6. U

11.7. M

1.1.1 Short Description .................................................................................................................................................... 59

11.7.1. Frequency Behaviour ..................................................................................................................................... 60

11.7.2. Power Supply Influence .................................................................................................................................. 60

11.7.3. Working Current Influence ............................................................................................................................. 61

11.8. STAT LED I

11.9. SIMIN

11.10. RTC B

11.11. SIM H

12. DAC AND ADC SECTION ....................................................................................................................................... 65

12.1. DAC C

12.1.1. Description ..................................................................................................................................................... 65

12.1.2. Enabling DAC ................................................................................................................................................. 66

12.1.3. Low Pass Filter Example................................................................................................................................. 66

12.2. ADC C

12.2.1. Description ..................................................................................................................................................... 67

12.2.2. Using ADC Converter ..................................................................................................................................... 67

12.3. D

OGIC LEVELS

SING A

GPIO P

SING A

GPIO P

SING THE

SING THE ALARM OUTPUT

SING THE BUZZER OUTPUT

AGNETIC BUZZER CONCEPTS

DETECTION

YPASS OUT

OLDER IMPLEMENTATION

ONVERTER

EBUG OF THE

..................................................................................................................................................... 56

AD AS

INPUT ...................................................................................................................................... 57

AD AS

OUTPUT .................................................................................................................................. 57

RFTXMON O

NDICATION OF NETWORK SERVICE AVAILABILITY

GL865

UTPUT

...................................................................................................................................................... 62

.................................................................................................................................................... 64

........................................................................................................................................................ 65

........................................................................................................................................................ 67

IN PRODUCTION

GPIO5 ......................................................................................................................... 57

GPIO6 ............................................................................................................................... 58

GPIO7 ............................................................................................................................... 58

....................................................................................................................................... 59

................................................................................................. 61

................................................................................................................................ 64

........................................................................................................................... 67

13. MOUNTING THE GL865 ON YOUR BOARD ........................................................................................................... 69

13.1. G

13.2. M

13.3. R

13.4. S

14. PACKING SYSTEM ................................................................................................................................................ 73

14.1. M

15. CONFORMITY ASSESSMENT ISSUES ..................................................................................................................... 75

16. SAFETY RECOMMANDATIONS ............................................................................................................................. 76

ENERAL

................................................................................................................................................................... 69

ODULE FINISHING & DIMENSIONS

ECOMMENDED FOOT PRINT FOR THE APPLICATION

OLDER PASTE

13.4.1. GL865 Solder reflow ....................................................................................................................................... 71

OISTURE SENSIBILITY

............................................................................................................................................................ 71

................................................................................................................................................. 74

................................................................................................................................ 69

........................................................................................................... 70

GL865 Hardware User Guide

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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-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:

Chapter 1: “Introduction” provides a scope for this document, target audience, contact and support information, and text conventions.

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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.

1.5. Text Conventions

Danger – This information MUST be followed or catastrophic equipment failure or bodily injury may occur.

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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

1.7. Document History

RReevviissiioon

ISSUE#0 ISSUE#1

DDaattee CChhaannggeess

2011-01-05 2011-07-22

First ISSUE Add FCC IC note in Safety recommendations

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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:

(

EN) The integration of the GSM/GPRS GL865 cellular module within

user application shall be done according to the design rules described in this manual.

(IT) L’integrazione del modulo cellulare GSM/GPRS dell’applicazione dell’utente dovrà rispettare le indicazioni progettuali descritte in questo manuale.

(DE) Die Integration des muß gemäß der in diesem Dokument beschriebenen Kunstruktionsregeln erfolgen.

(SL) Integracija GSM/GPRS morala upoštevati projektna navodila, opisana v tem piročniku.

(SP) La utilización del modulo GSM/GPRS usos para los cuales ha sido deseñado descritos en este manual del usuario.

(FR) L’intégration du module cellulaire GSM/GPRS l’application de l’utilisateur sera faite selon les règles de conception décrites dans ce manuel.

(HE)

GL865

GSM/GPRS Mobilfunk-Moduls in ein Gerät

modula v uporabniški aplikaciji bo

GL865

The information presented in this document is believed to be accurate and reliable. However, no responsibility is assumed by

GL865

debe ser conforme a los

GL865

all’interno

dans

GL865 Hardware User Guide

1vv0300910 Rev.1 – 2011-07-22

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

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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

can be

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4. GL865 module connections

4.1. PIN-OUT

Pad Signal

20 21 22 24 23

10 11

All

GPI0

program

med

44 45

7 8

13 14 15

EAR- AO EAR+ AO MIC- AI MIC+ AI AGND - Analog Ground -

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

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

SIMIO

SIMIN I

RXD_AUX I Auxiliary UART (RX Data) CMOS 2.8V TXD_AUX O Auxiliary UART (TX Data) CMOS 2.8V

C109/DCD/GPO O

C125/RING/GPO O

C107/DSR/GPO O

C108/DTR/GPI I

C105/RTS/GPI I

C106/CTS/GPO O

C103/TXD I Serial data input (TXD) from DTE CMOS 2.8V C104/RXD O Serial data output to DTE CMOS 2.8V

ADC_IN1 AI ADC_IN2 AI DAC_OUT AO

Earphone signal output, phase - Audio Earphone signal output, phase + Audio

Mic.signal input; phase- Audio Mic.signal input; phase+ Audio

SIM card interface

External SIM signal – Power supply for

External SIM signal – Data I/O

Prog. / Data + HW Flow Control

Output for Data carrier detect signal

Output for Ring indicator signal (RI)

Output for Data set ready signal (DSR)

Input for Data terminal ready signal

Input for Request to send signal (RTS)

Output for Clear to send signal (CTS)

Analog/Digital converter input A/D Analog/Digital converter input A/D

Digital/Analog converter output D/A

Function Note Type

Audio

the SIM

Presence SIM input

(See para 11.9)

Trace

(DCD) to DTE

/ GP output

to DTE

/ GP output

to DTE

/ GP output

(DTR) from DTE

/ GP input

from DTE

/ GP input

to DTE

/ GP output

DAC and ADC

1,8 / 3V

4.7K

Pull up

CMOS 2.8V

1,8 / 3V

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Pad Signal

30 47

43 34

38 37 23 32 33 35 36 46

48 16 17 18 19 25 31

VRTC AO

RESET* I Reset input CMOS 1.8V

V_AUX / PWRMON O

Antenna O Antenna output – 50 Ω RF

GPIO_01 /

DVI_WA0

GPIO_02 / JDR /

DVI_RX

GPIO_03 /

DVI_TX

GPIO_04 / TX

Disable /

DVI_CLK

GPIO_05 /

RFTXMON

GPIO_06 / ALARM

GPIO_07 /

BUZZER

GPIO_08 /

STAT_LED

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 GND - Ground Power GND - Ground Power GND - Ground Power GND - Ground Power

Miscellaneous Functions

2.8V stabilized output Imax=100mA

I/O GPIO01 Configurable GPIO

/ Digital Audio Interface (WA0) GPIO02 Configurable GPIO / Jammer

Detect Report

/ Digital Audio Interface (RX)

I/O GPIO03 Configurable GPIO

/ Digital Audio Interface (TX) GPIO04 Configurable GPIO / TX Disable

input

/ Digital Audio Interface (CLK)

I/O GPIO05 Configurable GPIO

/ Transmitter ON monitor

I/O GPIO06 Configurable GPIO

/ ALARM

I/O GPIO07 Configurable GPIO

/ Buzzer

I/O GPIO08 Configurable GPIO

/ STAT LED

Function Note Type

VRTC Backup Power

/ Power ON monitor

GPIO

Power Supply

RESERVED

CMOS 2.8V

Power Out

2.8V

WARNING:

Reserved pins must not be connected.

pin signal

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NOTE:

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

38, 37 VBATT & VBATT_PA

32, 33, 35, 36, 46 GND

23 AGND

7 TXD 8 RXD

5 RTS 43 V_AUX / PWRMON 47 RESET* 45 TXD_AUX 44 RXD_AUX

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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.

Modem Reset Proc

AT init sequence

Start AT CMD

PWMON = ON?

Enter AT<CR>

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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

can be consider fully operating.

When the power supply voltage is lower than 3.4V, after 4000 mseconds, the and the module can be consider fully operating.

The following flow chart shows the proper turn on procedure:

Modem ON Proc.

pin will be at the high logic level and the module

V_AUX / PWRMON

pin will be at the high logic level

PWR supply =

Delay 300mS

ON?

AT answer in

1second ?

Delay 1s - 4s

for Low Voltage

Delay 1s

Modem ON Proc.

Disconnect PWR

AT init

Enter AT<CR>

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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:

Start AT CMD.

Delay 300mS

AT answer in

1second ?

sequence.

supply

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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, about 30uA, 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

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:

V_AUX /

Modem OFF

Disconnect PWR

Modem ON

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Proc.

PWRMON = OFF?

supply

Place AT command

AT#SYSHALT

Wait

PWRMON =OFF

15s timeout

supply

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:

Delay 1.5s

Proc.

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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:

Reset = LOW

Delay 200ms

Reset = HIGH

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In the following flow chart is detailed the proper restart procedure:

Modem Reset

Proc.

PWRMON =

Delay 1s

Delay 1,5s

Start AT

CMD.

Disconnect PWR

supply

Modem ON

Proc.

NOTE:

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6. Power Supply

The power supply circuitry and board layout are a very important part in the full product design and they strongly reflect on the product overall performances, hence read carefully the requirements and the guidelines that will follow for a proper design.

6.1. Power Supply Requirements

The external power supply must be connected to VBATT & VBATT_PA signals and must fulfill the following requirements:

POWER SUPPLY

Nominal Supply Voltage Normal Operating Voltage Range Extended Operating Voltage Range

3.8 V

3.4 V÷ 4.20 V

3.22 V÷ 4.50 V

NOTE:

The Operating Voltage Range MUST never be exceeded; care must be taken in order to fulfil min/max voltage requirement.

NOTE:

Overshoot voltage (regarding MAX Extended Operating Voltage) and drop in voltage (regarding MIN Extended Operating Voltage) MUST never be exceeded;

The “Extended Operating Voltage Range” can be used only with completely assumption and application of the HW User guide suggestions.

NOTE:

When the power supply voltage is lower than 3.4V, after 4000 mseconds, the

V_AUX / PWRMON

pin will be at the high logic level

and the module can be consider fully operating. See para 5.1.

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6.2. Power Consumption

The GL865 power consumptions are:

GL 865

Mode

SWITCHED OFF

Switched Off <5uA Switched Off with

AT#SYSHALT

IDLE mode

AT+CFUN=1

AT+CFUN=4

AT+CFUN=0 or =5

CSD TX and RX mode

GSM900 CSD PL5 DCS1800 CSD PL0

GPRS (class 8) 1TX

DCS1800 PL0

GPRS (class 10) 2TX

GSM900 PL5 360 DCS1800 PL0 300

The GSM system is made in a way that the RF transmission is not continuous, else it is packed into bursts at a base frequency of about 216 Hz, and the relative current peaks can be as high as about 2A. Therefore the power supply has to be designed in order to withstand with these current peaks without big voltage drops; this means that both the electrical design and the board layout must be designed for this current flow. If the layout of the PCB is not well designed a strong noise floor is generated on the ground and the supply; this will reflect on all the audio paths producing an audible annoying noise at 216 Hz; if the voltage drop during the peak current absorption is too much, then the device may even shutdown as a consequence of the supply voltage drop.

Average

(mA)

<650uA

21,0

18,0

3,9 2,5 2,4 1,5

230

180

225 175

Mode description

Module power supplied only on VBATT_PA pin, the VBATT pin is not power supplied. Module power supplied on VBATT_PA pin and VBATT pin, the at command applied.

AT#SYSHALT

Normal mode: full functionality of the module Disabled TX and RX; module is not registered on the network Paging Multiframe 2 Paging Multiframe 3 Paging Multiframe 4 Paging Multiframe 9

GSM VOICE CALL

GPRS Sending data mode GSM900 PL5

GPRS Sending data mode

+ 55 hidden pages

Telit Communications S p A GL865Q User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual