Powered by the Wavecom Operating System and Open AT
®
Wireless CPU Quik Q2687
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.
General information about WAVECOM and its range of products is available at the
following internet address: http://www.wavecom.com
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.
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without
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 authored by Wavecom.
1.1.1 Wavecom Reference Documents
[1] Automotive Environmental Control Plan for Q2687 Wireless CPU
WM_QUA_Q2687_DCP_001
[2] Q2687 Wireless CPU Customer Design Guidelines
WM_DEV_Q2687_PTS_007
[3] Q2687 Wireless CPU Process Customer Guidelines
WM_PRJ_Q2686_PTS_004
[4] AT Commands Interface Guide for OS 6.61
WM_DEV_OAT_UGD_014
1.1.2 General Reference Document
[5] "I²C Bus Specification", Version 2.0, Philips Semiconductor 1998
[6] ISO 7816-3 Standard
1.2 List of abbreviations
Abbreviations Definition
AC Alternating Current
ADC Analog to Digital Converter
A/D Analog to Digital conversion
AF Audio-Frequency
AT ATtention (prefix for modem commands)
AUX AUXiliary
CAN Controller Area Network
CB Cell Broadcast
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without
Wireless CPU Quik Q2687 is a self-contained E-GSM/GPRS/EDGE 900/1800 and
850/1900 quad-band Wireless CPU with the following features:
2.1.1 Overall Dimensions
• Length: 40 mm
• Width: 32.2 mm
• Thickness: 4 mm
2.1.2 Environment and Mechanics
• Green policy: RoHS compliant
• Complete shielding
The Q2687 Wireless CPU is 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)".
Wireless CPUs which are compliant with this directive
are identified by the RoHs logo on their label.
2.1.3 GSM/GPRS/EGPRS Features
• 2-Watt EGSM – GPRS 900/850 radio section running under 3.6 Volts
• 1-Watt GSM-GPRS1800/1900 radio section running under 3.6 Volts
• 0.5-Watt EGPRS 900/850 radio section running under 3.6 Volts
• 0.4-Watt EGPRS 1800/1900 radio section running under 3.6 Volts
• Hardware GSM/GPRS class 10 and EGPRS class 10 capable
2.1.4 Interfaces
• Digital section running under 2.8V and 1.8V.
• 3V/1V8 SIM interface
• Complete interfacing:
o Power supply
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without
o Serial link
o Analog audio
o PCM digital audio
o SIM card
o Keyboard
o USB 2.0 slave
o Serial LCD (not available with AT commands)
o Parallel port for specific applications (under Open AT
The Radio Frequency (RF) functionalities complies with the Phase II EGSM 900/DCS
1800 and GSM 850/PCS 1900 recommendation. The frequencies are:
Transmit band (Tx) Receive band (Rx)
GSM 850 824 to 849 MHz 869 to 894 MHz
E-GSM 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 with a:
• Quad-band LNAs (Low Noise Amplifier)
• Direct Conversion Receiver
• Offset PLL/PL (Phase Locked Loop and Polar 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 digital part of the Wireless CPU Quik Q2687 is composed of a PCF5213 PHILIPS
chip. This chipset uses a 0,18 µm mixed technology CMOS, which allows massive
integration as well as low current consumption.
2.3 Operating System
Wireless CPU Quik Q2687 is designed to integrate various types of specific process
applications such as vertical applications (telemetry, multimedia, automotive).
The Operating System 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.
The Operating System is Open AT® compliant.
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without
A 100-pin connector is provided to interface the Wireless CPU Quik Q2687 with a
board containing a serial or parallel LCD module, a keyboard, a SIM connector, and a
battery connection.
The interfaces available on the GPC are described below.
chapter Name
3.4 Sérial Interface X
3.5 Parallel Interface X
3.6 Keyboard Interface X X
3.7 Main Sérial Link X X
3.8 Auxiliary Sérial Link X X
3.9 SIM Interface X X
3.10 Général Purpose IO X X
3.11 Analog to Digital Converter X X
3.12 Analog audio Interface X X
3.13 PWM / Buzzer Output X X
3.14 Battery Charging Interface X X
3.18 External Interruption X X
3.20 BAT-RTC (Backup Battery) X X
3.21 FLASH-LED signal X X
3.22 Digital Audio Interface (PCM) X X
3.23 USB 2.0 Interface X X
Driven by
AT commands
Driven by
Open AT®
3.2 Power Supply
The power supply is one of the key issues in the design of a GSM terminal.
Due to the burst emission mode used in GSM / GPRS, the power supply must be able
to deliver high current peaks in a short time. During the peaks, the ripple (Uripp) on
the supply voltage must not exceed a certain limit (see Table 1 Power supply
voltage).
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without
In communication mode, a GSM/GPRS class 2 terminal emits 577µs radio bursts
every 4.615ms (See the Figure 2).
VBATTT
Uripp
t = 577 µs
T = 4,615 ms
Uripp
Figure 2: Power supply during burst emission
In communication mode, a GPRS class 10 terminal emits 1154µs radio bursts every
4.615ms.
Only the VBATT power supply input is necessary to provide the Q2687 Wireless CPU.
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.
The RF Power Amplifier current (2.0 A peak in GSM /GPRS mode) flows with a
ratio of:
o 1/8 of the time (around 577µs every 4.615ms for GSM /GPRS class 2),
o 2/8 of the time (around 1154µs every 4.615ms for GSM /GPRS class 10)
and
o The rise time is around 10µs.
• Is internally used to provide via several regulators, the VCC_2V8 and VCC_1V8,
the power supply required for the base band signals.
Wireless CPU Quik Q2687 shielding case is the grounding. The ground plane has to
be connected to the motherboard through a complete layer on the PCB.
Input power Supply Voltage
V
VBATT
1,2
3.2 3.6 4.5 250mV (freq < 10kHz)
V
MIN
NOM
V
Ripple max (U
MAX
40mV (10kHz < freq
)
ripp
< 100kHz)
5mV (freq > 100kHz)
Table 1 Power supply voltage
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without
(1): This value has to be maintained during the burst (with 2.0A Peak in GSM, GPRS
or EGPRS mode)
(2): The maximum operating Voltage Stationary Wave Ratio (VSWR) is 2:1
When supplying the Wireless CPU from a battery, the total impedance (battery +
protections + PCB) should be <150 mOhms.
Caution:
When the Wireless CPU is in Alarm mode, no voltage must be applied on any pin of
the 100-pin connector except on BAT-RTC (pin 7) for RTC operation or ON/~OFF (pin
19) to power ON the Wireless CPU.
3.2.1 Power Consumption
Power consumption is dependent on the configuration used. It is for this reason that
the following consumption values are given for each mode, RF band and type of
software used (AT or Open AT™).
All the following information is given assuming a 50 Ω RF output.
The following consumption values were obtained by performing measurements on
Wireless CPU samples at a temperature of 25° C.
Three VBATT values are used to measure the consumption, VBATTmin (3.2V),
VBATTmax (4.5V) and VBATTtyp (3.6V).
The average current is given for the three VBATT values and the peak current given is
the maximum current peak measured with the three VBATT voltages.
For a more detailed description of the operating modes, see the Appendix of the AT
Command Interface Guide OS 6.61 [4]
For more information about the consumption measurement procedure, see Wireless
CPU Quik Q2687 Customer Design Guidelines [2].
®
3.2.1.1 Power Consumption without Open AT
Processing
The following measurement results are relevant only when:
¾ There is no Open AT
®
¾ The Open AT
application is disabled
¾ No processing is required by the Open AT
®
application
®
application
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without
means: the current peak is RF transmission burst (Tx burst)
TX
means: the current peak is RF reception burst (Rx burst)
RX
1
Slow Idle Mode consumption is dependent on the SIM card used. Some SIM cards
141/142 148/149 153/154 420
mA
TX
respond faster than others, the longer the response time, the higher the
consumption. The measurements were performed on a large number of 3V SIM
cards, and the results shown in the above table in brackets are the minimum and
maximum currents measured from the SIM cards used.
®
3.2.1.2 Power Consumption with Open AT
The power consumption with Open AT
®
software used is Dhrystone application, and
Software
the following consumption results were measured while performing on the Dhrystone
application.
Power consumption with Dhrystone Open AT® application
Operating mode Parameters
MIN
average
VBATT=4,5V
I
NOM
average
VBATT=3,6V
I
MAX
average
VBATT=3,2V
I
MAX
peak
unit
I
Alarm Mo de N/A N/A N/A µA
Fast Idle Mode
Slow Idle Mode
Paging 9 (Rx burst occurrence ~2s)
Paging 2 (Rx burst occurrence ~0,5s) 33 38 42 160
Paging 9 (Rx burst occurrence ~2s) NA NA NA NA mA
33 38 41 160
mA
RX
mA
RX
Paging 2 (Rx burst occurrence ~0,5s) NA NA NA NA mA
Fast Standby Mode 32 38 40 mA
Slow Standby Mode NA NA NA mA
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without
The three types of digital I/O on the Wireless CPU Quik Q2687 are: 2.8Volt CMOS,
1.8Volt CMOS, and Open drain.
The three types are as described below:
Electrical characteristics of digital I/O
2.8 Volt type (2V8 )
Parameter I/O type Min. Typ Max. Condition
Internal 2.8V power supply
Input / Output pin
*Absolute maximum ratings
VIL
VIH
VOL
VOH
IOH
I
OL
VCC_2V8
CMOS
CMOS
CMOS
CMOS
2.74V 2.8V 2.86V
-0.5V* 0.84V
1.96V 3.2V*
0.4V IOL = - 4 mA
2.4V IOH = 4 mA
4mA
- 4mA
All 2.8V I/O pins do not accept input signal voltage above the maximum voltage as
specified in the above table, except for the UART1 interface, which is 3.3V tolerant.
1.8 Volt type (1V8)
Parameter I/O type Min. Typ Max. Condition
Internal 1V8 power supply VCC_1V8 1.76V 1.8V 1.94V
Input / Output pin
VIL CMOS -0.5V* 0.54V
VIH CMOS 1.33V 2.2V*
VOL CMOS 0.4V IOL = - 4 mA
VOH CMOS 1.4V IOH = 4 mA
4mA
- 4mA
*Absolute maximum ratings
IOH
I
OL
This document is the sole and exclusive property of Wavecom. Not to be distributed or divulged without