Sierra Wireless Q24PL006, Q24PL003, Q24AU001, Q24EX001, Q24PL005 Users manual

WM_

Wireless CPU Q24 Series

Product Technical Specification

Revision: 003

Date: November 2006

Wireless CPU Q24 Series

Product Technical Specification

Reference: WM_PRJ_Q24NG_PTS_001

Revision:

Date:

003
November 2006

Powered by the Open AT

®

Software Suite

confidential © Page: 1 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Cautions

This platform contains a modular transmitter. This device is used for wireless
applications. Note that all electronics parts and elements are ESD sensitive.

Information provided herein by WAVECOM is accurate and reliable. However, no
responsibility is assumed for its use and any of such WAVECOM information is herein
provided "as is" without any warranty of any kind, whether express or implied.

Trademarks

®, WAVECOM®, WISMO®, Open AT® and certain other trademarks and logos
appearing on this document, are filed or registered trademarks of Wavecom S.A. in
France or in other countries. All other company and/or product names mentioned may
be filed or registered trademarks of their respective owners.

Copyright

This manual is copyrighted by WAVECOM with all rights reserved. No part of this
manual may be reproduced in any form without the prior written permission of
WAVECOM. No patent liability is assumed with respect to the use of their respective
owners.

confidential © Page: 2 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Web Site Support

General information about Wavecom and its range of products:

Specific support is available for the Q24 Classic, Plus, Extended and Auto Wireless
CPU:

www.wavecom.com/Q24Classic,

www.wavecom.com/Q24Plus,

www.wavecom.com/Q24Extended,

www.wavecom.com/Q24Auto

Carrier/Operator approvals:

Open AT® Introduction:

Developer support for software and hardware:

www.wavecom.com/approvals

www.wavecom.com/OpenAT

www.wavecom.com/forum

www.wavecom.com

confidential © Page: 3 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Overview

This Product Specification document defines and specifies the Wireless CPU Q24
Series is available in four different GSM/GPRS Class 10 quad-band versions:

• Q24 Classic: EGSM 900/1800/850/1900 MHz version with 32 Mb of Flash

memory and 16 Mb of PSRAM (32/16), T° range [-20°C / +55°C].

• Q24 Plus: EGSM/GPRS 900/1800/850/1900 MHz version with 32 Mb of Flash

memory and 16 Mb of PSRAM (32/16), T° range [-20°C / +55°C].

• Q24 Extended: EGSM/GPRS 900/1800/850/1900 MHz version with 32 Mb of

Flash memory and 4 Mb of SRAM (32/4), extended T° range.

• Q24 Automotive: EGSM/GPRS 900/1800/850/1900 MHz version with 32 Mb of

Flash memory and 4 Mb of PSRAM (32/4), extended T° range.

This version is dedicated to automotive applications.

This document covers the Wireless CPU alone and do not include the programmable
capabilities provided in Open AT® Software Suites.

For detailed software programming guides, refer to the documents shown in the
"Reference documents" section.

Open AT® Software Suites allow developers to natively execute ANSI C software
programs directly on the Wireless CPU.

confidential © Page: 4 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Document History

Revision Date List of revisions

001

002

003

May 2006

September 2006

November 2006

Creation (Preliminary version)

First update

Update

confidential © Page: 5 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Contents

1 References.......................................................................................................10

1.1 Reference Documents..................................................................................... 10

1.1.1 Wavecom Reference Documents............................................................. 10

1.1.2 General Reference Documents ................................................................ 10

1.2 Abbreviations.................................................................................................. 11

2 General Description .........................................................................................14

2.1 General Information ........................................................................................ 14

2.1.1 Overall Dimensions................................................................................. 14

2.1.2 Open AT® Software Suite ........................................................................ 14

2.1.3 GSM/GPRS Features ............................................................................... 15

2.1.4 Interfaces................................................................................................ 15

2.1.5 External RF Connection Interfaces........................................................... 16

2.1.6 SIM Card Holder ..................................................................................... 16

2.1.7 Green Policy............................................................................................ 16

2.2 Functional Architecture................................................................................... 17

2.2.1 RF Functionalities ................................................................................... 18

2.2.2 Baseband Functionalities ........................................................................ 18

3 Interfaces ........................................................................................................19

3.1 General Purpose Connector (GPC)................................................................... 19

3.2 Power Supply ................................................................................................. 20

3.2.1 Power Supply Description....................................................................... 20

3.2.2 Power Supply Recommendation ............................................................. 22

3.2.3 Power Consumption ............................................................................... 24

3.3 Electrical Information for Digital I/O................................................................. 28

3.4 Serial Interface ................................................................................................ 28

3.4.1 SPI Bus................................................................................................... 28

3.4.2 SPI Auxiliary Bus .................................................................................... 28

3.4.3 Two-wire Bus Interface (I2C) ................................................................... 29

3.5 Keyboard Interface ..........................................................................................29

3.6 Main Serial Link (UART1) ................................................................................30

3.7 Auxiliary Serial Link (UART2) ..........................................................................32

3.8 SIM Interface .................................................................................................. 32

3.8.1 General Description.................................................................................32

3.8.2 SIM Card Holder ..................................................................................... 34

3.9 General Purpose Input/Output......................................................................... 36

confidential © Page: 6 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

3.10 Activity Status Indication ................................................................................ 37

3.11 Analog to Digital Converter (ADC) ...................................................................38

3.12 Audio Interface ............................................................................................... 38

3.12.1 Microphone Inputs.................................................................................. 39

3.12.2 Speaker Outputs ..................................................................................... 42

3.13 Buzzer Output ................................................................................................ 44

3.13.1 Hardware Description ............................................................................. 44

3.14 Battery Charging Interface .............................................................................. 45

3.14.1 Hardware Description ............................................................................. 45

3.14.2 Temperature Monitoring ......................................................................... 47

3.14.3 Ni-Cd / Ni-Mh Charging Algorithm .......................................................... 47

3.14.4 Li-Ion Charging Algorithm....................................................................... 49

3.15 ON / ~OFF....................................................................................................... 52

3.15.1 General Description................................................................................. 52

3.15.2 Operating Sequences.............................................................................. 53

3.16 BOOT (optional) .............................................................................................. 55

3.17 Reset Signal (~RST) ........................................................................................ 56

3.17.1 General Description................................................................................. 56

3.17.2 Reset Sequence ...................................................................................... 58

3.18 External Interrupt (~INTR) ............................................................................... 58

3.19 VCC output ..................................................................................................... 59

3.20 Real Time Clock Supply (VCC_RTC) ................................................................. 60

3.21 RF Interface .................................................................................................... 61

3.21.1 RF Connections....................................................................................... 61

3.21.2 RF Performance ......................................................................................62

3.21.3 Antenna Specifications ...........................................................................62

4 Technical Specifications...................................................................................63

4.1 General Purpose Connector Pin-out Description.............................................. 63

4.2 I/O Circuit Diagram .........................................................................................67

5 Environmental Specifications ...........................................................................68

5.1 Environmental Qualifications ..........................................................................69

5.1.1 Reflow Soldering:....................................................................................70

5.2 Mechanical Specifications............................................................................... 71

5.2.1 Physical Characteristics .......................................................................... 71

5.2.2 Mechanical Drawings ............................................................................. 71

6 Connector and Peripheral Device References....................................................73

6.1 General Purpose Connector Data Sheet ..........................................................73

6.2 SIM Card Reader............................................................................................. 73

6.3 Microphone .................................................................................................... 73

6.4 Speaker........................................................................................................... 73

confidential © Page: 7 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

6.5 Antenna Cable ................................................................................................ 73

6.6 RF board-to-board Connector.......................................................................... 74

6.7 GSM Antenna .................................................................................................74

7 Appendix.........................................................................................................75

7.1 Standards and Recommendations .................................................................. 75

7.2 Safety Recommendations (for Information only).............................................. 77

7.2.1 RF safety................................................................................................. 78

7.2.2 General safety......................................................................................... 79

confidential © Page: 8 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Table of Figures

Figure 1: Functional architecture ..............................................................................17

Figure 2: Power supply during burst emission.......................................................... 21

Figure 3: Maximum voltage ripple (Uripp) versus Frequencies in GSM & DCS.......... 23

Figure 4: UART1 Serial Link signals .......................................................................... 31

Figure 5: UART2 Serial Link signals .......................................................................... 32

Figure 6: SIM Card holder constraints ......................................................................34

Figure 7: Buzzer connection .....................................................................................45

Figure 8: Ni-Cd / Ni-Mh charging waveform .............................................................49

Figure 9: Li-Ion full-charging waveform .................................................................... 52

Figure 10: Power-ON sequence diagram ..................................................................54

Figure 11: Power-OFF sequence diagram ................................................................. 55

Figure 12: RST pin connection.................................................................................. 58

Figure 13: Reset sequence diagram ..........................................................................58

Figure 14: Wireless CPU pin position (bottom view) ................................................. 66

Figure 15: I/O Circuit Diagram................................................................................... 67

Figure 16: Q24 Classic, Q24 Plus and Q24 Extended Environmental classes............ 69

Figure 17: Q24 Automotive environmental classes ................................................... 70

Figure 18: Mechanical drawing. ............................................................................... 71

confidential © Page: 9 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

References

1 References

1.1 Reference Documents

For more details, several reference documents may be consulted. The Wavecom
reference documents are provided in the Wavecom documents package contrary to
the general reference documents, which are not Wavecom owned.

1.1.1 Wavecom Reference Documents

[1] Automotive Environmental Control Plan for Wireless CPU Q24 Series

WM_PRJ_Q24NG_DCP_001

[2] Environmental Control Plan for Wireless CPU Q24 Series

WM_PRJ_Q24NG_DCP_002

[3] Wireless CPU Q24 Series Customer Design Guidelines

WM_PRJ_Q24NG_PTS_002

[4] Wireless CPU Q24 Series Process Customer Guidelines

WM_PRJ_Q24NG_PTS_003

[5] AT Commands Interface Guide for OS 6.57

WM_ASW_OAT_UGD_0044

[6] AT Commands Interface Guide (Bluetooth)

WM_ASW_BLU_UGD_001

[7] ADL User Guide for Open ATA® V3.12

WM_ASW_OAT_UGD_006

1.1.2 General Reference Documents

[8] "I²C Bus Specification", Version 2.0, Philips Semiconductor 1998
[9] ISO 7816-3 Standard

©Confidential Page: 10 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

1.2 Abbreviations

Abbreviation Description

3GPP Third Generation Partnership Project

ADC Analog to Digital Converter

A/D Analog to Digital conversion

AT ATtention (prefix for modem commands)

AUX AUXiliary

CBS Cell Broadcast Service

CLK CLocK

CMOS Complementary Metal Oxide Semiconductor

CODEC COder DECoder

CPU Central Processing Unit

CTS Clear To Send

dB Decibel

DC Direct Current

DCD Data Carrier Detect

DCS Digital Cellular System

DCXO Digitally Controlled C

DR Dynamic Range

DSR Data Set Ready

DTR Data Terminal Ready

EDGE Enhanced Data rates for GSM Evolution

EGSM Extended GSM

EN Enable

ESD ElectroStatic Discharges

ETSI European Telecommunications Standards Institute

FEM Front End Module

FR Full Rate

GND GrouND

GPI General Purpose Input

GPC General Purpose Connector

GPIO General Purpose Input Output

GPO General

Purpose Output

GPRS General Packet Radio Service

GSM Global System for Mobile communications

rystal Oscillator

References

©Confidential Page: 11 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Abbreviation Description

IF Intermediate Frequency

INTR INTeRrupt

I/O Input / Output

LCD Liquid Crystal Display

LED Light Emitting Diode

LNA Low Noise Amplifier

LSB Less Significant Bit

MAX MAXimum

MIC MICrophone

MIN MINimum

MMS Multimedia Message Service

MS Mobile Station

NOM NOMinal

NTC Negative Temperature Coefficient

PA Power Amplifier

PBB PolyBrominated Biphenyl

PBDE PolyBrominated Diphenyl Ethers

PCB Printed Circuit Board

PCL Power Control Level

PCS Personal Communications Services

PLL Phase Lock Loop

RAM Random Access Memory

RF Radio Frequency

RI Ring Indicator

RoHS Restriction of Hazardous Substances

RST ReSeT

RTC Real Time Clock

RTS Request To Send

RX Receive

SCL Serial CLock

SDA Serial DAta

SIM Subscriber Identification Module

SMS Short M

essage Service

SPI Serial Peripheral Interface

SPK SPeaKer

Wireless CPU Q24 Series

References

©Confidential Page: 12 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Abbreviation Description

SRAM Static RAM

TDMA Time Division Multiple Access

TU Typical Urban fading profile

TUHigh Typical Urban, High speed fading profile

TDMA Time Division Multiple Access

TX Transmit

TYP TYPical

UART Universal Asynchronous Receiver-Transmitter

VLSI Very Large Scale Integration

VSWR Voltage Standing Wave Ratio

References

©Confidential Page: 13 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

General Description

2 General Description

2.1 General Information

The Wireless CPU Q24 Series are self-contained EGSM/GPRS 900/1800 and 850/1900
quad-band Wireless CPUs with the following characteristics:

Note:

The Q24 classic is limited to GSM only (GPRS not supported).

2.1.1 Overall Dimensions

Completely shielded:

• Length: 58.4 mm

• Width: 32.2 mm

• Thickness: 3.9 mm:

- Excluding Shielding legs

- 6, 2 mm for Q24 Automotive, which offers either a MMS or UFL connector
on the top side

• Weight:<11 g (12g for Q24 Automotive)

®

2.1.2 Open AT

Software Suite

Every Wavecom Wireless CPU comes with the "Open AT® Software", which has the
following five elements:

Î Open AT® IDEs

Î Open AT® Applications

Î Open AT® Plug-Ins

Î Open AT® Operating Systems

Î Open AT® Firmwares

The Open AT® Software Suite enables a customer to develop within the Open AT®
IDE an ANSI C based Open AT® Application, which is natively executed under the
Open AT® OS which may utilise one or more Open AT® Plug-Ins and connect to
wireless networks, peripheral devices & companion controllers via the Open AT®
Firmware.

Among other things (please refer to Open AT

®

Programming Guides), the Open AT®

firmware offers:

• Real Time Clock (RTC) with calendar

• Echo Cancellation and noise reduction (quadri codec)

• Full GSM or GSM/GPRS Operating System stacks

©Confidential Page: 14 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

AAA

Wireless CPU Q24 Series

General Description

The Wireless CPU Q24 Series are designed to integrate various types of specific
process applications such as vertical applications (telemetry, multimedia,
automotive).

The Open AT firmware offers a set of AT commands to control the Wireless CPU.

With this standard Operating System, some interfaces of the Wireless CPU are not
available since they are dependent on the peripheral devices connected to the

Wireless CPU.

TTT

The Open AT OS offers a set of Open AT

limitation mentioned above is not valid in this case.

2.1.3 GSM/GPRS Features

This symbol is used to indicate that the interfaces are not available with AT
commands.

®

The Operating System is Open AT

compliant.

®

AT API’s to control the Wireless CPU. The

• 2-Watt EGSM 900/GSM 850 radio section running under 3.6 volts

• 1-Watt GSM1800/1900 radio section running under 3.6 Volts

• Hardware GSM/GPRS class 10 capable (except the Wireless CPU Q24

Classic)

2.1.4 Interfaces

• Complete interfacing is through a 60-pin connector:
o SPI and 2-wire bus interface

o Keyboard interface
o Two serial link interfaces (UART1 and UART2)
o 3V/1.8V SIM interface
o GPIOs
o Activity status indication interface
o Analog to digital converter
o Analog audio
o Buzzer interface
o Battery charging interface
o External interrupt
o Power supply interface
o Back-up battery interface

• Optional SIM holder (offered on Wireless Q24 Classic and Wireless CPU Q24

Plus)

©Confidential Page: 15 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

General Description

2.1.5 External RF Connection Interfaces

The Wireless CPU Q24 Series are available with different external RF connection
configurations:

Product reference UFL UFL or MMS Antenna pad IMP

Position Bottom side Top side Top side Bottom side

Q24 Classic X X X

Q24 Plus X X X

Q24 Extended X X X

Q24 Automotive X X X

2.1.6 SIM Card Holder

The Wireless CPU Q24 Series are available with a SIM Card holder at the TOP:

SIM interface location

Product reference 60-pin connector Optional SIM holder

Q24 Classic X X

Q24 Plus X X

Q24 Extended X

Q24 Automotive X

Caution:

• The Wireless CPU Q24 Series does not allow two SIM Cards to be connected

at the same time.

• If a Wireless CPU Q24 Classic or Q24 Plus is used with a SIM Card holder at

the top, it is mandatory

to avoid a SIM interface connection through the 60-

pin General Purpose Connector (GPC).

2.1.7 Green Policy

The Wireless CPU Q24 Series are compliant with RoHS (Restriction of Hazardous
Substances in Electrical and Electronic Equipment). Directive 2002/95/EC which sets
limits for the use of certain restricted hazardous substances.

This directive states that "from 1st July 2006, new electrical and electronic equipment
put on the market does not contain lead, mercury, cadmium, hexavalent chromium,
polybrominated biphenyls (PBB), and polybrominated diphenyl ethers (PBDE)".

©Confidential Page: 16 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

General Description

2.2 Functional Architecture

The global architecture of the Wireless CPU Q24 Series is shown below:

G
E
N
E
R
A
L

P
U
R
P
O
S
E

C
O
N
N
E
C
T
O
R

Power supply

Battery

management

SIM supply

Audio interface

FLASH

RAM

RF interface

A/D converter

SIM controller

Vocoder

Keyboard
controller

UART1 –UART2

Controller

SPI –I2C

Controller

RTC

CPU

Memory

management

Transceiver

PA front-end

module

RF

CONNECTIONS

Figure 1: Functional architecture

©Confidential Page: 17 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

General Description

2.2.1 RF Functionalities

The Radio Frequency (RF) range complies with the Phase II EGSM 900/DCS 1800 and
GSM 850/PCS 1900 recommendations. The frequencies are given below:

GSM band Transmit band (Tx) Receive band (Rx)

GSM 850 824 to 849 MHz 869 to 894 MHz

EGSM 900 880 to 915 MHz 925 to 960 MHz

DCS 1800 1710 to 1785 MHz 1805 to 1880 MHz

PCS 1900 1850 to 1910 MHz 1930 to 1990 MHz

The Radio Frequency (RF) part is based on a specific quad-band chip. It includes a:

• Digital low-IF receiver,

• Quad-band LNAs (Low Noise Amplifier),

• Offset PLL (Phase Locked Loop) transmitter,

• Frequency synthesizer,

• Digitally controlled crystal oscillator (DCXO),

• Tx/Rx FEM (Front-End module) for quad-band GSM/GPRS.

2.2.2 Baseband Functionalities

The Wireless CPU Q24 Series digital parts are based on the PHILIPS-VLSI chip (ONE C
GSM / GPRS Kernel).

This chipset uses a 0.25 μm CMOS mixed technology, which allows massive
integration as well as low current consumption.

©Confidential Page: 18 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Interfaces

3 Interfaces

Note:

Some of the Wireless CPU Q24 Series interface signals are multiplexed in order to
limit the total number of pins. But this architecture imposes some restrictions.

Example:

If the SPI bus and 2-wire bus are multiplexed and if the SPI bus is used, then the 2­wire bus is not available.

Caution:

To power-ON the Wireless CPU Q24 Series correctly and to avoid any damage, all
external signals must be inactive when the Wireless CPU Q24 Series is OFF.

3.1 General Purpose Connector (GPC)

A 60-pin connector, with 0.5 mm pitch, is provided to interface the Wireless CPU Q24
Series with a customer application board containing either an LCD module, or a
keyboard, a SIM connector, a battery connection, etc.

The GPC is made by the KYOCERA / AVX group with the following reference:

• 14 5087 060 930 861.

The matting connector has the following reference:

• 24 5087 060 X00 861.

For further details, refer to section "

6.1General Purpose Connector Data Sheet".

©Confidential Page: 19 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Interfaces

The available interfaces on the GPC are shown below:

OS 6.57 Open AT

Section Name

Supported

3.4 Serial interface X X

3.5 Keyboard Interface X X

3.6 Main Serial Link X X

3.7 Auxiliary Serial Link X X

3.8 SIM interface X X

3.9 General Purpose IO X X

3.10

3.11

Activity status

indication

Analog to digital

converter

X X

X X

3.12 Audio Interface X X

3.14 Battery charging

X X

interface

3.15 ON/~OFF X X

3.16 Boot X X

3.17 Reset X X

3.18 External interrupt X X

3.19 VCC output X X

0 Real Time Clock X X

0 RF interface X X

Not

supported

Supported

Not

supported

3.2 Power Supply

3.2.1 Power Supply Description

The power supply is one of the key factors in the design of a GSM terminal.

Due to the burst emission in GSM / GPRS, the power supply must be able to deliver
high current peaks in a short time. During these peaks, the ripple (Uripp) on the
supply voltage must not exceed the limits specified, see the table ""Maximum voltage
ripple (Uripp) vs Frequency" given below.

• In communication mode, a GSM/GPRS class 2 terminal emits 577μs radio

bursts every 4.615ms. (see the
emission).

• In communication mode, a GPRS class 10 terminal emits 1154μs radio bursts

every 4.615ms.

©Confidential Page: 20 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

Figure 2: Power supply during burst

November 2006

VBATTT

Wireless CPU Q24 Series

Interfaces

Uripp

t = 577 μs

T = 4,615 ms

Uripp

Figure 2: Power supply during burst emission

Two different inputs are provided for the power supply:

• VBATT is used to supply the RF part and

• VDD is used to supply the baseband part.

VBATT: Directly supplies the RF components with 3.6 V. It is essential to keep a
minimum voltage ripple at this connection in order to avoid any phase error. In
particular, VBATT supplies the RF Power Amplifier.

The current waveform is bursted with the following duty cycles:

• 1/8 of the time (around 577 μs every 4.615 ms for GSM/GPRS class 2),

• 2/8 of the time (around 1154 μs every 4.615 ms for GSM/GPRS class 10).

The rising time is around 10 μs.

VDD: Supplies the +2.8 V ballast regulators of the Wireless CPU Q24 Series. It is
essential to keep the voltage over 3.1 volts at any time.

Notes:

• It is possible to connect VBATT and VDD together.

• In the event of separate power supply, they must be in same state: e.g. either

active or inactive at the same time.

GND: The grounding connection of the Wireless CPU Q24 Series is made through the
shielding Ö The four "legs" must be soldered to a complete

ground plane.

The power supply voltage for VBATT and VDD is given below:

Power supply pin-out

Signal Pin number

VBATT 55,57,58,59,60

VDD 11

GND Shielding legs

©Confidential Page: 21 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Interfaces

Electrical characteristics

Signal MIN NOM MAX

VBATT 3.2 V 3.6 V 4.5 V *

VDD 3.1 V 4.5 V

*Max operating Voltage Standing Wave Ratio (VSWR) 2:1.

3.2.2 Power Supply Recommendation

The VBATT voltage limits must be considered at any time.

The worst condition is during the burst period transmission, when current
consumption is at its highest. During this period, the VBATT voltage is minimum:

• The output voltage of the power supply drops.

• Voltage drop is present between the power supply output and the Wireless

CPU supply pins (VBATT).

To ensure a good design, make sure that
drop in voltage should not set the Wireless CPU supply voltage (VBATT) below
VBATT

Notes:

= 3.2V.

MIN

during a transmit burst period, the total

• During a transmit burst, Wireless CPU nominal current is 1.4A only.

• To design the Wireless CPU power supply with a margin, a target of 2A

recommended.

Caution:

• If VBATT<3.2V, the Wireless CPU automatically powers OFF.

• When a Wireless CPU is supplied with a battery, the total impedance (battery

+ contacts + protections + PCB) should be < 150mΩ to limit voltage drop-out
within emission burst.

• As the radio power amplifier is directly connected to the VBATT, the Wireless

CPU Q24 Series are sensitive to any voltage variation. When a DC/DC
converter is used, Wavecom recommends to set the converter frequency in
such a way that the resulting voltage does not exceed these values, which
are given in the following table. "Maximum voltage ripple (Uripp) vs
Frequency".

is

©Confidential Page: 22 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Interfaces

Freq.
(kHz)

Uripp Max

(mVpp)

Freq.
(kHz)

Uripp Max

(mVpp)

Freq. (kHz)

Uripp Max

(mVpp)

<100 50 800 4 1500 34

200 15.5 900 15.2 1600 33
300 6.8 1000 9.5 1700 37
400 3.9 1100 32 1800 40
500 4 1200 22 >1900 40
600 2 1300 29
700 8.2 1400 30

50
45
40
35
30
25
20

Uripp (mVpp)

15
10

5
0

200 400 600 800 1000 1200 1400 1600 1800

Input Frequency (kHz)

for f<100kHz U
for f> 1800kHz U

Max = 50mVpp

ripp

Max = 40 mVpp

ripp

Figure 3: Maximum voltage ripple (Uripp) versus Frequencies in GSM & DCS

Refer to Wireless CPU Q24 Series Customer Design Guidelines

[3], for further

information on power supply design.

©Confidential Page: 23 / 81

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

November 2006

Wireless CPU Q24 Series

Interfaces

3.2.3 Power Consumption

The Wireless CPU Q24 Series support different power consumption modes:

Working modes Comments

OFF mode The Wireless CPU is in OFF mode.

ALARM mode The Wireless CPU is in OFF mode with RTC block running, when

an ALARM occurs, the Wireless CPU wakes-up automatically.

FAST idle mode The Wireless CPU is synchronized with an RF GSM/GPRS

network.
The internal 26 MHz of the Wireless CPU is constantly active.

SLOW idle mode The Wireless CPU is synchronized with an RF GSM/GPRS tester.

The internal 26 MHz of the Wireless CPU is not constantly active.

FAST Standby

mode

SLOW Standby

mode

Communication

mode

The power consumption depends on the configuration used. It is for this reason that
the following power consumption values are given for each modes, RF bands and
software used (AT or Open AT

The SIM and Radio interface are deactivated via AT command or
Open AT API:

-The embedded application is running

-The serial port remains active (AT commands are available).
The internal 26 MHz of the Wireless CPU is constantly active.
This mode is similar to the FAST Standby mode.
All the features are disabled (no GSM, no GPRS, no SIM and no

Serial port).
The internal 26 MHz of the Wireless CPU is not constantly active.
A GSM/GPRS communication is established with a RF

GSM/GPRS network.

®

).

All the following information is given, by assuming a 50 Ω

Three VBATT values are used to measure the consumption, VBATT
VBATT

(4.5V) and VBATT

MAX

(3.6V).

TYP

RF output.

(3.2V),

MIN

The average current is given for three VBATT values and peak current given is the
maximum current peak measured with three VBATT voltages.

For more information on power consumption measurement, hardware configuration,
SIM used, and software Dhrystone application, see the AT Command Interface Guide
or OS 6.57

[5] and Wireless CPU Q24 Series Customer Design Guidelines [3].

When Wireless CPU is in Alarm mode, no voltage must be applied to any pin of the
60-pin connector, except on the BAT-RTC (pin 56) for RTC operation or ON/~OFF (pin

6) to power-ON the Wireless CPU.

3.2.3.1 Power Consumption without Open AT® Processing

The following measurement results are relevant only when:

®

• There is no Open AT

• The Open AT

This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without
prior written agreement.

WM_PRJ_Q24NG_PTS_001-003

®

application is disabled,

©Confidential Page: 24 / 81

application,

November 2006