Telit Communications S p A GE864QA User Manual

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

This document is relating to the following products:

GE864-AUTO 3990250701

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

Contents

1 Overview ...........................................................................................................................6

2 GE864-AUTO Mechanical Dimensions ...........................................................................7

3 GE864-AUTO module connections .................................................................................8

3.1 PIN-OUT...................................................................................................................................8

3.1.1 BGA Balls Layout........................................................................................................................... 12

4 Hardware Commands ....................................................................................................14

4.1 Turning ON the GE864-AUTO module ................................................................................14

4.2 Turning OFF the GE864-AUTO ............................................................................................16

4.2.1 Hardware shutdown....................................................................................................................... 16

4.2.2 Hardware Unconditional Restart.................................................................................................... 16

5 Power Supply .................................................................................................................18

5.1 Power Supply Requirements...............................................................................................18

5.2 General Design Rules ..........................................................................................................20

5.2.1 Electrical Design Guidelines .......................................................................................................... 20

5.2.1.1 + 5V input Source Power Supply Design Guidelines ................................................................ 20

5.2.1.2 + 12V input Source Power Supply Design Guidelines .............................................................. 21

5.2.1.3 Battery Source Power Supply Design Guidelines ..................................................................... 23

5.2.2 Thermal Design Guidelines ........................................................................................................... 24

5.2.3 Power Supply PCB layout Guidelines ........................................................................................... 25

6 Antenna...........................................................................................................................26

6.1 GSM Antenna Requirements ...............................................................................................26

6.2 GSM Antenna - PCB line Guidelines...................................................................................27

6.3 GSM Antenna - Installation Guidelines ..............................................................................28

7 Logic level specifications..............................................................................................29

7.1 Reset signal ..........................................................................................................................30

8 Serial Ports .....................................................................................................................31

8.1 MODEM SERIAL PORT......................................................................................................... 31

8.2 RS232 level translation ........................................................................................................33

8.3 5V UART level translation....................................................................................................35

9 Audio Section Overview ................................................................................................37

9.1 INPUT LINES (Microphone) .................................................................................................38

9.1.1 Short description............................................................................................................................ 38

9.1.2 Input Lines Characteristics ............................................................................................................ 39

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

9.2 OUTPUT LINES (Speaker).................................................................................................... 40

9.2.1 Short description............................................................................................................................ 40

9.2.2 Output Lines Characteristics.......................................................................................................... 41

10 General Purpose I/O.......................................................................................................42

10.1 GPIO Logic levels .............................................................................................................44

10.2 Using a GPIO Pad as INPUT.............................................................................................45

10.3 Using a GPIO Pad as OUTPUT.........................................................................................45

10.4 Using the RF Transmission Control GPIO4.................................................................... 45

10.5 Using the RFTXMON Output GPIO5 ................................................................................46

10.6 Using the Alarm Output GPIO6........................................................................................ 47

10.7 Using the Buzzer Output GPIO7 ......................................................................................47

10.8 Indication of network service availability .......................................................................48

10.9 RTC Bypass out ................................................................................................................49

10.10 External 32KHz oscillator.................................................................................................49

11 ADC section....................................................................................................................51

11.1 ADC Converter ..................................................................................................................51

11.1.1 Description..................................................................................................................................... 51

11.1.2 Using ADC Converter .................................................................................................................... 51

11.2 Mounting the GE864-AUTO on your Board ....................................................................52

11.2.1 General .......................................................................................................................................... 52

11.2.2 Module finishing & dimensions...................................................................................................... 52

11.2.3 Recommended foot print for the application (GE864)................................................................... 53

11.2.4 Debug of the GE864 in production ................................................................................................ 54

11.2.5 Stencil ............................................................................................................................................ 54

11.2.6 PCB pad design............................................................................................................................. 55

11.2.7 Solder paste................................................................................................................................... 56

11.2.8 GE864 Solder reflow...................................................................................................................... 57

11.3 Packing system.................................................................................................................58

11.3.1 GE864 orientation on the tray........................................................................................................ 59

11.3.2 Moisture sensibility ........................................................................................................................ 59

12 Conformity Assessment Issues....................................................................................60

13 SAFETY RECOMMANDATIONS.....................................................................................61

14 Document Change Log ..................................................................................................62

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

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.

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

1 Overview

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

Telit GE864-AUTO 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 GE864-AUTO module. For further hardware details that may not be explained in this document refer to the Telit GE864-AUTO Product Description document where all the hardware information is reported.

NOTICE

(EN) The integration of the GSM/GPRS according to the design rules described in this manual.

(IT) L’integrazione del modulo cellulare GSM/GPRS GE864-AUTO all’interno dell’applicazione dell’utente dovrà rispettare le indicazioni progettuali descritte in questo manuale.

(DE) Die integration des GE864-AUTO GSM/GPRS Mobilfunk-Moduls in ein Gerät muß gemäß der in diesem Dokument beschriebenen Kunstruktionsregeln erfolgen

(SL) Integracija GSM/GPRS GE864-AUTO modula v uporabniški aplikaciji bo morala upoštevati projektna navodila, opisana v tem piročniku.

(SP) La utilización del modulo GSM/GPRS GE864-AUTO debe ser conforme a los usos para los cuales ha sido deseñado descritos en este manual del usuario.

(FR) L’intégration du module cellulaire GSM/GPRS GE864-AUTO dans l’application de l’utilisateur sera faite selon les règles de conception décrites dans ce manuel.

GE864-AUTO cellular module within user application shall be done

GE864-AUTO

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.

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

2 GE864-AUTO Mechanical Dimensions

The Telit GE864-AUTO module overall dimension are:

• Length: 30 mm

• Width: 30 mm

• Thickness: 2.8 mm

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

3 GE864-AUTO module connections

3.1 PIN-OUT

Ball Signal I/O Function Internal PULL UP Type

Audio

F9 AXE I Handsfree switching 100K CMOS 2.8V

G8 MIC_HF+ AI

G9 MIC_MT- AI

G10 EAR_MT+ AO Handset earphone signal output, phase + Audio

J8 MIC_MT+ AI

J9 MIC_HF- AI

J10 EAR_HF- AO Handsfree ear output, phase - Audio

H9 EAR_MT- AO Handset earphone signal output, phase - Audio

H10 EAR_HF+ AO Handsfree ear output, phase + Audio

C10 SIMCLK O External SIM signal – Clock 1,8 / 3V

C11 SIMIN I External SIM signal - Presence (active low) 47K 1,8 / 3V

D4 SIMVCC - External SIM signal – Power supply for the SIM 1,8 / 3V

D10 SIMIO I/O External SIM signal - Data I/O 1,8 / 3V

E9 SIMRST O External SIM signal – Reset 1,8 / 3V

D11 TX_TRACE O TX Data for debug monitor CMOS 2.8V

F10 RX_TRACE I RX Data for debug monitor CMOS 2.8V

B6 C125/RING O Output for Ring indicator signal (RI) to DTE CMOS 2.8V

B7 C108/DTR I

D9 C109/DCD O

E7 C103/TXD I Serial data input (TXD) from DTE CMOS 2.8V

E11 C107/DSR O Output for Data set ready signal (DSR) to DTE CMOS 2.8V

F7 C105/RTS I

F6 C106/CTS O Output for Clear to send signal (CTS) to DTE CMOS 2.8V

H8 C104/RXD O Serial data output to DTE CMOS 2.8V

D2 IIC_SDA_HW I/O IIC HW interface /Configurable GPIO CMOS 2.8V

E1 IIC_SCL_HW I/O IIC HW interface /Configurable GPIO CMOS 2.8V

Handsfree mic. input; phase +, nom. level 3mVrms Handset mic.signal input; phase-, nom. level 50mVrms

Handset mic.signal input; phase+, nom. level 50mVrms Handsfree mic.input; phase -, nom. level 3mVrms

SIM card interface

Trace

Prog. / Data + HW Flow Control

Input for Data terminal ready signal (DTR) from DTE Output for Data carrier detect signal (DCD) to DTE

Input for Request to send signal (RTS) from DTE

IIC

Audio

CMOS 2.8V

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

Ball Signal I/O Function Internal PULL UP Type

DAC and ADC

J11 ADC_IN1 AI Analog/Digital converter input A/D

H11 ADC_IN2 AI Analog/Digital converter input A/D

G11 ADC_IN3 AI Analog/Digital converter input A/D

Miscellaneous Functions

A2 RESET* I Reset input

D8 STAT_LED O Status indicator led CMOS 1.8V

E2 VRTC AO VRTC Power

F3 32K_IN I 32.768 KHz Square Wave Input CMOS 1.8V

Input command for switching power ON or OFF

J5 ON_OFF* I

L8 PWRMON O Power ON Monitor CMOS 2.8V

L4 Antenna O Antenna output – 50 ohm RF

E6 TGPIO_01 / JDR I/O Telit GPIO01 I/O pin / Jammer detect report CMOS 2.8V

H5 TGPIO_02/PCM_WAO I/O Telit GPIO02 Configurable GPIO / PCM audio * CMOS 2.8V

K7 TGPIO_03 / PCM_RX I/O Telit GPIO03 Configurable GPIO / PCM audio * CMOS 2.8V

B3 TGPIO_04 I/O

K8 TGPIO_05 / RFTXMON I/O

B5 TGPIO_06 / ALARM I/O Telit GPIO06 Configurable GPIO / ALARM CMOS 2.8V

L9 TGPIO_07 / BUZZER I/O Telit GPIO07 Configurable GPIO / Buzzer CMOS 2.8V

H3 TGPIO_08 / PCM_TX I/O Telit GPIO08 Configurable GPIO / PCM audio * CMOS 2.8V

D7 PCM_CLK I/O Configurable GPIO / PCM audio * CMOS 2.8V

J1 VBATT - Main power supply Power

K1 VBATT - Main power supply Power

J2 VBATT - Main power supply Power

K2 VBATT - Main power supply Power

A1 GND - Ground Power

F1 GND - Ground Power

H1 GND - Ground Power

L1 GND - Ground Power

H2 GND - Ground Power

L2 GND - Ground Power

J3 GND - Ground Power

K3 GND - Ground Power

L3 GND - Ground Power

K4 GND - Ground Power

K5 GND - Ground Power

D6 GND - Ground Power

K6 GND - Ground Power

L6 GND - Ground Power

(toggle command). The pulse to be sent to the GE864 must be equal or greater than 1 second.

Telit GPIO

Telit GPIO04 Configurable GPIO / RF Transmission Control Telit GPIO05 Configurable GPIO / Transmitter ON monitor

Power Supply

47K Pull up to VBATT

CMOS 2.8V

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

Ball Signal I/O Function Internal PULL UP Type

A11 GND - Ground Power

F11 GND - Ground Power

L11 GND - Ground Power

RESERVED

A10

B10

B11

E10

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

Ball Signal I/O Function Internal PULL UP Type

K10

K11

L10

* Ref. to Digital Voice Interface Application Note 80000NT10004a.

NOTE: RESERVED pins must not be connected

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

pins:

pin signal

J1,K1,J2,K2 A1,F1,H1,L1,H2,L2,J3,K3,L3, K4,K5,D6,K6,L6,A11,F11,L11

E7 A2 H8

VBATT

GND

ON/OFF*

TXD

RESET*

RXD

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

3.1.1 BGA Balls Layout

TOP VIEW

A B C D E F G H J K L

GND - - -

RESET* - -

- TGPIO_04 - - - 32K_IN -

-- - - SIMVCC - - - - - GND Antenna

TGPIO_06

/ ALARM

C125/RING

C108 /

DTR

IIC_SCL_

IIC_SDA_

- -

- GND

PCM_CLK

VRTC - - GND VBATT VBATT GND

TGPIO_01

C103 /

- - -

/ JDR

TXD

GND - GND VBATT VBATT GND

C106 /

CTS

C105 /

RTS

- -

TGPIO_08 / PCM_TX

TGPIO_02 / PCM_WAO

- - GND GND

GND GND GND

ON_OFF* GND -

TGPIO_03/

PCM_RX

- - -

- - SIMCLK SIMIO

GND - SIMIN

STAD_

C109 /

TX_TRACE

LED

DCD

- - MIC_HF+

SIMRST AXE MIC_MT- EAR_MT- MIC_HF- -

- RX_TRACE

C107 /

DSR

GND ADC_IN3 ADC_IN2 ADC_IN1 - GND

EAR_MT+ EAR_HF+ EAR_HF- - -

C104 /

RXD

MIC_MT+

TGPIO_05

RFTXMON

PWRMON

TGPIO_07 / BUZZER

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

AUDIO Signals balls

SIM CARD interface balls

TRACE Signals balls

Prog. / data + Hw Flow Control signals balls

IIC

DAC and ADC signals balls

MISCELLANEOUS functions signals balls

TELIT GPIO balls

POWER SUPPLY VBATT balls

POWER SUPPLY GND balls

RESERVED

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

4 Hardware Commands

4.1 Turning ON the GE864-AUTO module

To turn on the GE864-AUTO the pad ON* must be tied low for at least 1 seconds and then released. The maximum current that can be drained from the ON* pad is 0,1 mA. A simple circuit to do it is:

Power ON impulse

GND

NOTE: don't 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 GE864-AUTO power regulator and improper power on/off of the module. The line ON* must be connected only in open collector configuration.

NOTE: In this document all the lines that are inverted, hence have active low signals are labeled with a name that ends with a "*" .

TIP: To check if the device has powered on, the hardware line PWRMON should be monitored. After 900ms the line raised up the device could be considered powered on.

ON*

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

For example: 1- Let's assume you need to drive the ON* pad with a totem pole output from +1.8V up to 5V microcontroller (uP_OUT1):

ON*

10k

1.8V ... 5V

2- Let's assume you need to drive the ON* pad directly with an ON/OFF button:

ON*

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

4.2 Turning OFF the GE864-AUTO

The turning off of the device can be done in three ways:

• by software command (see GE864-AUTO Software User Guide)

• by hardware shutdown

• by Hardware Unconditional Restart

When the device is shut down by software command or by hardware shutdown, it issues to the network a detach request that informs the network that the device will not be reachable any more.

4.2.1 Hardware shutdown

To turn OFF the GE864-AUTO the pad ON* must be tied low for at least 2 seconds 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* pad.

TIP: To check if the device has powered off, the hardware line PWRMON should be monitored. When PWRMON goes low, the device has powered off.

4.2.2 Hardware Unconditional Restart

To unconditionally Restart the GE864-AUTO, the pad RESET* must be tied low for at least 200 milliseconds and then released. A simple circuit to do it is:

Unconditional Restart impulse

RESET*

GND

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

NOTE: don't 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 GE864-AUTO power regulator and improper functioning of the module. The line RESET* must be connected only in open collector configuration.

TIP: The unconditional hardware Restart should be always implemented on the boards and software should use it as an emergency exit procedure.

For example: 1- Let's assume you need to drive the RESET* pad with a totem pole output from +1.8V up to +5V microcontroller (uP_OUT2):

RESET*

.8V ... 5V

10k

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

5 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.

5.1 Power Supply Requirements

POWER SUPPLY

Nominal Supply Voltage 3.8V

Max Supply Voltage 4.2V

Operating Supply Voltage Range 3.4V – 4.2V

Wide Supply Voltage tolerant 3.25V – 4.2V

TIP: the supply voltage is directly measured between VBATT and GND balls. It must stay within the Wide Supply Voltage tolerant range including any drop voltage and overshoot voltage (during the slot tx, for example).

GE864-AUTO Hardware User Guide

1vv0300779 Rev.0 - 20/06/08

The GE864-AUTO power consumptions are:

GE864-AUTO

Mode Average (mA) Mode description

IDLE mode

AT+CFUN=1 23,9

AT+CFUN=4 22

AT+CFUN=0 or

AT+CFUN=5

7,20 / 3,561

Disabled TX and RX; module is not registered on the

Power saving: CFUN=0 module registered on the network

and can receive voice call or an SMS; but it is not possible

to send AT commands; module wakes up with an

unsolicited code (call or SMS) or rising RTS line. CFUN=5

full functionality with power saving; module registered on

the network can receive incoming calls and SMS

Stand by mode; no call in progress

Normal mode: full functionality of the module

network

RX mode

1 slot in downlink 52,3 2 slot in downlink 65,2

GSM Receiving data mode

3 slot in downlink 78,6 4 slot in downlink 88,4

GSM TX and RX mode

Min power level 78,1

GSM Sending data mode

Max power level 200,1

GPRS (class 10) TX and RX mode

Min power level 123,7

GPRS Sending data mode

Max power level 370,8

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, 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.

TIP: The electrical design for the Power supply should be made ensuring it will be capable of a peak current output of at least 2A.

Worst/best case depends on network configuration and is not under module control

+ 43 hidden pages

Telit Communications S p A GE864QA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual