GR 47/GR 48
Technical Description
CE
The product described in this manual conforms to the Radio Equipment and Telecommunication Terminal
Equipment (R&TTE) directive 99/5/EC with requirements covering EMC directive 89/336/EEC and
Low Volt age directive 73/23/EEC. The product fulfils the requirements according to 3GPP TS 51.010-1,
EN 301489-7 and EN60950.
The information contained in this document is the proprietary information of Sony Ericsson Mobile
Communications. 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 Sony Ericsson Mobile Communications , is strictly prohibited.
Further, no portion of this publication may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electronic or mechanical, including photocopying and recording, without the
prior written consent of Sony Ericsson Mobile Communications , the copyright holder.
Second edition (February 2003)
Sony Ericsson Mobile Communications . publishes this manual without making any warranty as to the
content contained herein. Further Sony Ericsson Mobile Communications . reserves the right to make
modifications, additions and deletions to this manual 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 manual.
All rights reserved.
© Sony Ericsson Mobile Communications ., 2003
Publication number:
Printed in UK
GR47/GR48 Technical description
Contents
1 INTRODUCTION ...........................................................................................................5
1.1 OVERVIEW ...............................................................................................................5
1.2 FEATURES ...............................................................................................................6
1.2.1 Type of Mobile Station ......................................................................................6
1.2.2 SMS ................................................................................................................7
1.2.3 Voice calls .......................................................................................................7
1.2.4 Data ................................................................................................................7
1.2.5 SIM Card .........................................................................................................8
1.2.6 Power consumption ..........................................................................................8
1.2.7 Other features ..................................................................................................8
1.2.8 Development Kit ...............................................................................................8
1.3 PRECAUTIONS ..........................................................................................................9
1.4 ABBREVIATIONS ........................................................................................................9
2 MECHANICAL DESCRIPTION .................................................................................... 11
2.1 INTERFACE DESCRIPTION ......................................................................................... 11
2.2 PHYSICAL DIMENSIONS ............................................................................................ 12
3 SYSTEM CONNECTOR INT ERFACE ..........................................................................13
3.1 OVERVIEW ............................................................................................................. 13
3.2 GENERAL ELECTRICAL AND LOGICAL CHARACTERISTICS................................................ 16
3.2.1 General Protection Requirements .................................................................... 17
3.3 GROUNDS .............................................................................................................. 18
3.3.1 The Analogue Ground .....................................................................................18
3.3.2 The Digital Ground (DGND) ............................................................................ 18
3.4 REGULATED POWER S UPPLY ....................................................................................19
3.4.1 Power Supply (VCC) .......................................................................................19
3.4.2 Battery Charging Input (CHG_IN) .................................................................... 19
3.5 ON/OFF AND EXTERNAL POWER S IGNALS..................................................................20
3.5.1 Module ON/OFF............................................................................................. 20
3.5.2 External 2.75 V (VIO) ......................................................................................21
3.6 ANALOGUE A UDIO ...................................................................................................22
3.6.1 Audio To Mobile Station (ATMS)...................................................................... 22
3.6.2 Audio From Mobile Station (AFMS)..................................................................24
3.7 MICROPHONE S IGNALS ............................................................................................24
3.8 SPEAKER S IGNALS ..................................................................................................25
3.9 DIGITAL AUDIO........................................................................................................ 25
3.10 SERIAL DATA ...................................................................................................... 27
3.10.1 UART 1 (RS232) - RD, TD, RTS, CTS, DTR, DCD, DSR and RI........................29
3.10.2 Serial Data Signals - RD, TD........................................................................... 29
3.10.3 Control Signals - RTS, CTS, DTR, DCD, RI, DSR............................................. 30
3.10.4 UART 2 - TD2, RD2........................................................................................ 32
3.10.5 UART 3 - TD3, RD3........................................................................................ 32
3.11 SIM CARD RELATED SIGNALS................................................................................. 33
3.11.1 SIM Detection – SIM Presence ........................................................................34
3.12 SERVICE /PROGRAMMING ...................................................................................... 34
3.13 BUZZER.............................................................................................................. 35
3.14 LED.................................................................................................................. 35
3.15 TX_ON - BURST TRANSMISSION............................................................................ 36
3.16 REAL TIME CLOCK ............................................................................................... 36
3.17 EXTENDED IO CAPABILITIES ...................................................................................37
3.17.1 LED/IO6......................................................................................................... 37
3.17.2 I#/O# ............................................................................................................. 37
GBBA/SEM/BMS 03:0001 Rev A 3
GR47/GR48 Technical description
3.17.3 UART3/IO# .................................................................................................... 37
3.17.4 IO# / ADC# .................................................................................................... 37
3.18 KEYBOARD INTERFACE ......................................................................................... 39
3.18.1 IO# / KEYROW#............................................................................................. 39
3.18.2 KEYCOL# ......................................................................................................39
4 ANTENNA CONNECTOR ............................................................................................41
5 AT COMMAND SUMMARY ......................................................................................... 42
6 EMBEDDED APPLICATIONS ...................................................................................... 45
6.1 FEATURES ............................................................................................................. 45
6.2 IMPLEMENTATION.................................................................................................... 45
6.2.1 Limitations ..................................................................................................... 45
6.2.2 IDE (Integrated Developers Environment)........................................................ 46
7 TCP/IP STACK ........................................................................................................... 47
7.1 IMPLEMENTATION.................................................................................................... 47
8 TECHNICAL DATA..................................................................................................... 48
9 CONTACT DETAILS ................................................................................................... 50
GBBA/SEM/BMS 03:0001 Rev A 4
GR47/GR48 Technical description
1 Introduction
1.1 Overview
The GR47/GR48 belong to a new generation of Sony Ericsson Mobile
Communications GSM modules. This document describes the main
characteristics and functionality of the GR47/48, two dual band
products for 900/1800 MHz and 850/1900 MHz GSM bands
respectively.
They are intended to be used in both machine -to-machine applications
and man-to-machine applications. The module serves its purpose
when there is a need for sending and receiving data (by SMS, CSD,
HSCSD, or GPRS), as well as making voice calls over the GSM
network.
GR47/GR48 are business-to-business products. It is intended to be
sold to manufacturers, system integrators, applications developersdeveloping solutions with wireless communication. The module is
intended to be integrated by the system integrator within an
application. The module and the external application will form a
system for wireless communication.
A typical system is one where a micro controller in an external
application communicates with the module over its serial interface.
The micro controller will control the module, via the supported set of
AT commands. It is assumed that the system integrators have a high
technical knowledge and the ability to integrate the module into a
system. For the GR47/GR48 modules some interesting applications
are the following:
• Fleet and Asset Management
• Vending Machines
• Security and Alarm
• Other telemetry applications
GBBA/SEM/BMS 03:0001 Rev A 5
GR47/GR48 Technical description
1.2 Features
The module performs a set of telecom services (TS) according to
GSM standard phase 2+, ETSI and ITU-T. The functions of the
module are implemented by issuing AT commands over the serial
interface. Supported AT commands are listed in section 5, these are
defined further in GSM 7.05/7.07 and the GR47/GR48 integrator’s
manual.
1.2.1 Type of Mobile Station
The GR 4X family are normal dual band type of MS with the
following characteristics.
GR47 GSM 900 E-GSM 900 GSM 1800
Frequency Range
(MHz)
Channel spacing 200 kHz 200 kHz
Number of channels 173 Carriers *8 (TDMA)
Modulation GM SK GM SK
TX Phase Accuracy < 5º RMS Phase error (burst) < 5º RMS Phase error (burst)
Duplex spacing 45 MHz 95 MHz
Receiver sensitivity at
antenna connector
Transmitter output
power at antenna
connector
Automatic hand-over between GSM 900 and GSM 1800
GR48 GSM 850 GSM 1900
Frequency Range (MHz) TX: 824-849
Channel spacing 200 kHz 200 kHz
Number of channels 123 carriers *8 (TDMA)
Modulation GM SK GM SK
TX Phase Accuracy < 5º RMS Phase error (burst) < 5º RMS Phase error (burst)
Duplex spacing 45 MHz 80 MHz
Receiver sensitivity at
antenna connector
Transmitter output power at
antenna connector
Automatic hand-over between GSM 850 and GSM 1900
TX: 880-915
RX: 935-960
GSM: Channels 1 to 124
E-GSM: Channels 975 to 1023
< - 102 dBm < - 102 dBm
Class 4
2W (33 dBm)
TX: 880-890
RX: 925-935
TX: 1710-1785
RX: 1805-1880
374 Carriers *8 (TDMA)
DCS: Channels 512 to 885
Class 1
1W (30 dBm)
TX: 1850-1910
RX: 869-894
GSM: Channels 128 to 251
< - 102 dBm < - 102 dBm
Class 5
0.8 W (29 dBm)
RX: 1930-1990
298 Carriers *8 (TDMA)
PCS: Channels 512 to 810
Class 1
1W (30 dBm)
GBBA/SEM/BMS 03:0001 Rev A 6
GR47/GR48 Technical description
1.2.2 SMS
The module supports the following SMS services:
• Sending: MO, both PDU and Text mode supported.
• Receiving: MT, both PDU and Text mode supported.
• CBM is a service, in which a message is sent to all subscribers
located in one or more specific cell(s) in the GSM ne twork, for
example, cell location information.
• SMS STATUS REPORT according to GSM 03.40.
The maximum length of an SMS message is 160 characters when
using 7-bit encoding. For 8-bit data, the maximum length is 140
characters.
The module supports upto 6 concatenated messages to extend this
function.
1.2.3 Voice calls
The GR47/GR48 offers the capability of MO and MT voice calls, as
well as supporting emergency calls. In addition to this multiparty, call
waiting and call deflection features are available. Some of these
features are operator specific.
The module offers normal analogue input/output lines, analogue audio
input/ output lines in differential modes, and digital audio interface,
with the possibility of accessing internal points within t he digital
audio lines. Moreover, the GR47/GR48 have an embedded echo
canceller and noise suppression, which provide high quality audio.
The module supports HR, FR and EFR voice coding, provided that
EFR is available in the network.
1.2.4 Data
The module supports the following data protocols:
• General Packet Radio Service (GPRS). The modules are Class B
Terminals, which provides simultaneous activation and attach of
GPRS and GSM services. The GR47/GR48 modules are GPRS
4+1 devices, which are capable of transmitting in one timeslot per
frame (uplink), and receiving in a maximum of four timeslots per
frame (downlink).
• Circuit Switched Data (CSD). GR47/GR48 modules are capable of
establishing a circuit switch data link at 9.6 kbps.
• High Speed Circuit Switched Data (HSCSD). GR47/GR48 supports
HSCSD communication, with one timeslot per frame capacity in
the uplink and two timeslots per frame capacity in the downlink
(2+1).
GBBA/SEM/BMS 03:0001 Rev A 7
GR47/GR48 Technical description
1.2.5 SIM Card
The module supports the connection of an external SIM Card with 3V
or 5 V technology, via the 60-pin system connector. The module does
not have an internal SIM holder.
1.2.6 Power consumption
Stand-by Transmit/Operation
GSM 850 & 900 MHz <5 mA 275 mA (2A peak)
GSM 1800 & 1900 MHz <5 mA 250 mA (1.75A peak)
Note! The power consumption during transmission is measured at
maximum transmit power.
1.2.7 Other features
• 07.10 Multiplexing
• GPS interoperability
• SIM application toolkit, class 2 release 96 compliant
• Embedded application (see section 6)
• On board TCP/IP stack (see section 7)
1.2.8 Development Kit
Sony Ericsson Mobile Communications provides the opportunity to
test the module in a limited scale, before ordering a large quantity.
1.2.8.1 M2mpower Package
With the M2mpower package you can quickly get started with the
module. The developer's Kit as part of the M2mpower Package
includes necessary accessories (software and hardware) that you will
need for your test purposes. It also includes the following:
• GSM module GR47 or GR48
• Integrator’s Manual
• M2mpower IDE
• M2mpower application guide
The Integrator’s Manual provides you with all the information you
need to be able to integrate the module with your application. The
Embedded Applications software IDE is supplied ready to run on a
GBBA/SEM/BMS 03:0001 Rev A 8
GR47/GR48 Technical description
suitable PC and comes with extensive help files, training course and
support.
1.2.8.2 Developer’s kit
As an alternative, the Integrator’s Manual and Universal Development
Board are available as a separate offering. The kit includes other
necessary accessories (software and hardware) that you will need for
your test purposes
These are available from your regional salesperson or M2M customer
support (see section 7)
1.3 Precautions
The GR47/GR48 should be handled like any mobile station. In the
Integrators’ Manual you will find more information about safety and
product care. In the Technical Data chapter in this document the
environmental and electrical limits are specified. Never exceed these
limits to ensure the module is not damaged.
1.4 Abbreviations
Abbreviation Explanation
ATMS Audio To Mobile Staition
AFMS Audio From Mobile Station
CBS Cell Broadcast Service
CBM Cell Broadcast Messaging
CSD Circuit Switch Data
DCE Data Circuit Terminating Equipment
DTE Data Terminal Equipment
DTMF Dual Tone Multi Frequency
EA Embedded Applications
EFR Enhanced Full Rate codec
EMC Electro-Magnetic Compatibility
ETSI European Telecommunications Standards Institute
FR Full Rate codec
GPRS General Packet Radio Service
GPS Global Positioning System
GSM Global System for Mobile Comunication
HR Half Rate codec
HSCSD High Speed Circuit Switched Data
IDE Integrated Developers Environment
GBBA/SEM/BMS 03:0001 Rev A 9
GR47/GR48 Technical description
IP Internet Protocol
ITU-T International Telecommunication Union – Telecommunications
Standardisation Sector
ME Mobile Equipment
MMCX Micro Minature Coax
MO Mobile Originated
MS Mobile Station
MT Mobile Terminated
PCM Pulse Code Modulation
PDU Protocol Data Unit
RLP Radio Link Protocol
RF Radio Frequency
RFU Reserved for Future Use
RTC Real Time Clock
SDP Service Discovery Protocol
SMS Short Message Service
SIM Subscriber Identity Module
TCP Transport Control Protocol
TBD To Be Defined
UDP User Datagram Protocol
GBBA/SEM/BMS 03:0001 Rev A 10
GR47/GR48 Technical description
2 Mechanical Description
2.1 Interface Description
The picture below presents the conceptual mechanical design of the
GR47/48. The GR47/GR48 are protected with AISI 304 Stainless
Steel covers suitable to fulfil the environmental and EMC
requirements. Dimensions, the position of the different connectors and
mounting holes are shown in figure 2.2.
Figure 2.1 GR 47/48, view from the underside
GBBA/SEM/BMS 03:0001 Rev A 11
GR47/GR48 Technical description
2.2 Physical Dimensions
Figure 2.2 Physical dimensions of GR 47/48
The measures are given in millimetres. See also chapter 6, Technical
Data.
GBBA/SEM/BMS 03:0001 Rev A 12
GR47/GR48 Technical description
3 System Connector Interface
3.1 Overview
The electrical connections to the module (except the antenna), are
made through the System Connector Interface.
The connector shall allow the following connections: board to board
and board to cable. Details of connector availability and sources are
available from customer support on request.
Figure 3.1 GR 47/48. View from the underside
The table on next page provides the pin assignment of the different
signals in the System Connector Interface as well as a short
description of them.
All signal directions are with respect to the module i.e. Direction 'O'
means data being sent by the module.
GBBA/SEM/BMS 03:0001 Rev A 13
GR47/GR48 Technical description
Pin Signal Name Dir Signal Type Description
1. VCC - Supply Power Supply
2. DGND - - Digital Ground
3. VCC - Supply Power Supply
4. DGND - - Digital Ground
5. VCC - Supply Power Supply
6. DGND - - Digital Ground
7. VCC - Supply Power Supply
8. DGND - - Digital Ground
9. VCC - Supply Power Supply
10. DGND - - Digital Ground
11. CHG_IN - Batt Charge
(power)
12. DGND - - Digital Ground
13. IO5
I/O I Dig 2.75
Battery charging
General Purpose input/output 5
ADC4
14. ON/OFF I Internal pull
15. SIMVCC - Dig. 3/5 V SIM card power supply
16. SIMPRESENCE I Internal pull
17. SIMRST O Dig. 3/5 V SIM card reset
18. SIMDATA I/O Dig. 3/5 V SIM card data
19. SIMCLK O Dig. 3/5 V SIM card clock
20. DAC O Analogue Digital to Analogue converter
21. IO1
KEYROW2
22. IO2
ADC 5
23. IO3
KEYROW3
24. IO4
Analogue
up, open
drain
up, open
drain
I/O I Digital, 2.75 General purpose input/output 1
I/O I Digital, 2.75
Analogue
I/O I Digital, 2.75 General purpose input/output 3
I/O I Digital, 2.75 General purpose input/output 4
Analogue to digital converter 4
Turns the module on/off
Former WAKE_B
Power output for SIM Card from
module
SIM Presence
A "1" shall indicate that the SIM is
missing; a "0" that it is inserted.
Keyboard row 2
General purpose input/output 2
Analgue to digital converter 5
Keyboard row 3
KEYROW4
25. VRTC I Supply 1.8 V Voltage for real time clock
26. ADC1 I Analogue Analogue to digital converter 1
27. ADC2 I Analogue Analogue to digital converter 2
Keyboard row 4
GBBA/SEM/BMS 03:0001 Rev A 14
GR47/GR48 Technical description
28. ADC3 I Analogue Analogue to digital converter 3
29. SDA I/O 2.75, internal
pullup
30. SCL O 2.75, internal
pullup
31. BUZZER O Dig. 2.75 Buzzer output from module
32. O3
O
Dig. 2.75 General purpose output 5
I2C Data
I2C Clock
KEYCOL3
DSR
33. LED
IO6
34. V IO O Power Out
35. TX_ON O Dig 2.75 This output shall indicate when the
36. RI
KEYCOL2
O2
37. DTR
KEYROW1
IN1
38. DCD
KEYCOL1
O1
O
O
O
Dig. 2.75 Flashing LED
I/O
2.75
O
Dig. 2.75 Ring Indicator
O
O
I
Dig. 2.75 Data Terminal Ready
I
I
O
Dig. 2.75 Data Carrier Detect
O
O
Keyboard column 3
Data Set Ready
General purpose I/O 6
Module powered indication.
The VIO is a 2.75 V output that could
power external devices to transmit
data towards the GSM device to a
75mA max.
GSM module is going to transmit the
burst.
Keyboard column 2
General purpose output 2
Keyboard row 1
General purpose input 1
Keyboard column 1
General purpose output 1
39. RTS
IO9
40. CTS
KEYCOL4
O4
41. TD I Dig. 2.75 Transmitted Data [former DTMS]
42. RD O Dig. 2.75 Received Data [former DFMS]
43. TD3
I/O7
44. RD3
I/O8
45. TD2 I Dig. 2.75 UART2 Reception [Former CTMS]
46. RD2 O Dig. 2.75 UART2 Transmission [Former CFMS]
I
Dig. 2.75 Request To Send
I/O
O
Dig. 2.75 Clear To Send
O
O
I
Dig. 2.75 UART3 Transmission
I/O
O
Dig. 2.75 UART3 Reception
I/O
General purpose I/O 9
Keyboard column 4
General purpose output 4
General purpose I/O 7
General purpose I/O 8
GBBA/SEM/BMS 03:0001 Rev A 15
GR47/GR48 Technical description
47. PCMULD I Dig. 2.75 DSP PCM digital audio input
48. PCMDLD O Dig. 2.75 DSP PCM digital audio output
49. PCMO O Dig. 2.75 Codec PCM digital audio output
50. PCMI I Dig. 2.75 Codec PCM digital audio input
51. PCMSYNC O Dig. 2.75 DSP PCM frame sync
52. PCMCLK O Dig. 2.75 DSP PCM clock output
53. MICP I Analogue Microphone input positive
54. MICN I Analogue Microphone input negative
55. BEARP O Analogue Speaker output positive
56. BEARN O Analogue Speaker output negative
57. AFMS O Analogue Audio output from module
58. SERVICE I 12V/2.7V Flash programming voltage for the
MS. Enable logger information if no
flashing
Former VPPFLASH
59. ATMS I Analogue Audio input to module
60. AGND - Analogue Analogue ground
Note : Although the pin out has changed the unit remains backwardly
compatible with the GM47.
3.2 General Electrical and Logical Characteristics
Many of the signals present in the interface are high-speed CMOS
logic inputs or outputs powered from 2.75 V ± 5 %. Whenever a
signal is defined as Dig. 2.75 V, the following electrical
characteristics shall apply.
Parameter Min. Typ. Max. Units
High Level Output Voltage (VOH) 2.2 2.75 Volts - 2 mA
Low Level Output Voltage (VOL) 0 0.6 Volts 2 mA
High Level Input Voltage (VIH) 1.93 2.75 Volts
Low Level Input voltage (VIL) 0 0.5 Volts
Output
Current I
o
GBBA/SEM/BMS 03:0001 Rev A 16
GR47/GR48 Technical description
3.2.1 General Protection Requirements
All 2.75V digital inputs shall continuously withstand any voltage from
-0.5V up to 3.47V (3.3V + 5%) in the power-on or power-off
condition with no damage. All 2.75V digital outputs shall
continuously withstand a short circuit to any voltage within the range
from 0V to 3V.
! Note : This is for protection ONLY, the module cannot be driven
directly by a 3.3V micro processor, if this is done it will invalidate any
warranty claim on the module.
The SIM output signals and the SIMVCC supply can continuously
withstand a short circuit to any voltage within the range from 0V to
4.1V.
GBBA/SEM/BMS 03:0001 Rev A 17
GR47/GR48 Technical description
3.3 Grounds
Pins Name Description
2, 4, 6, 8, 10, 12 DGND Digital Ground
60 AGND Analogue Ground
There are two ground signals in GR 47/48, Analogue Ground
(AGND) and Digital Ground (DGND). The analogue Ground is
connected to pin number 60, and the Digital Ground is connected to
the System Connector Interface through pin numbers 2, 4, 6, 8, 10 and
12.
Note: All the Ground pins have to be connected to the application.
The AGND is connected to the DGND in the ME, and only there. It is
important that the AGND and the DGND are separated in the
application.
3.3.1 The Analogue Ground
The AGND lead is the analogue audio reference ground. It is the
return signal for Audio To Mobile Station (ATMS) and Audio From
Mobile Station (AFMS).
It shall be connected to the Digital Ground (DGND) inside the module
and only there. The application shall not connect DGND and AGND.
Parameter Limit
I
≅12.5mA
max
3.3.2 The Digital Ground (DGND)
DGND is the reference for all digital signals in the System Interface.
It shall also be the DC return for the power supply on VCC and
SERVICE. Each DGND pin is rated at 0.5 A. All DGND pins are
connected internally in the module.
All DGND pins should be connected commonly in the application.
Parameter Limit
I
< 0.5 A No DGND pin can withstand over 0.5 A
average
I
< 600 mA (100 mA each)
max
GBBA/SEM/BMS 03:0001 Rev A 18
GR47/GR48 Technical description
3.4 Regulated Power Supply
Pins Name Description
1, 3, 5, 7, 9 VCC Regulated Power Supply
The regulated power supply, VCC, is connected to the pin numbers 1,
3, 5, 7 and 9.
3.4.1 Power Supply (VCC)
The VCC supplies the module with external power. Any other voltage
needed is generated internally.
Parameter Mode Limit
Voltage to be applied Nominal 3.6 Volts
Tolerance including ripple
Over voltages 5.5 Volts
1
3.4 Volts - 4.0 Volts
Current Drive capability at TX Full Power < 600 mA (average))
< 2 A (Peak)
GR 47/48 have not internal capacitance to supply the large current
peaks during GSM transmission. Therefore on burst transmission the
application DC source is responsible for providing the appropriate
current.
Design application notes are available from customer support on
request.
3.4.2 Battery Charging Input (CHG_IN)
The battery charging pin is design to provide a charging current into a
battery. The precise algorithm is TBD but it will be one of the
following
• Generic charging algorithm implemented and further
refinements for the algorithm to be implemented through
embedded applications (see section 6)
• Specific charging algorithms for SEM approved batteries.
1 Measured at system connector pins.
GBBA/SEM/BMS 03:0001 Rev A 19
GR47/GR48 Technical description
3.5 ON/OFF and External Power Signals
Pins Name Dir Description
14 ON/OFF I Square signal to turn on/off the module
34 VIO O External power supply
3.5.1 Module ON/OFF
The module is powered ON/OFF by grounding (pulling low) pin 14 as
per figure 3.2 below. The pin should then be released as it has an
internal pull up to return it to the high state.
Note: Driving with 2.75V or 3.6V is not permitted and restricts
module functionality.
Parameter Minimum Typical Maximum Units
Voltage HIGH Level (FALSE) VCC By internal pull
up only
Voltage LOW Level (TRUE) 0 0.3*VCC Volts
Pull-up Resistance Internal pull up 39
KΩ
Figure 3.2ON/OFF and VIO performance
Where the times are defined as follows:
Time Description Min Typ Max Unit
t
mr
t
pwr
Time to start an ON/OFF operation 1 1.5 S
Time for module start-up once ON/
OFF signal has set to TRUE
100 200 mS
GBBA/SEM/BMS 03:0001 Rev A 20
GR47/GR48 Technical description
Minimum
3.5.2 External 2.75 V (VIO)
The VIO has been derived from a 2.75 V regulator. It is possible to
use this output as a power supply at 2.75 V with a maximum of 75mA.
It will indicate that the module is alive and it could power external
devices. In this case, the external applications do not need to
implement a 2.75 volt regulator to adapt the incoming (from module
point of view) serial data.
Parameter
Typical Maximum Units
Output Voltage (I
Load current 75 mA
=50 mA) 2.70 2.75 2.85 Volts
load
GBBA/SEM/BMS 03:0001 Rev A 21
GR47/GR48 Technical description
3.6 Analogue Audio
Pins Name Dir Description
57 AFMS O Audio From Mobile Station
59 ATMS I Audio To Mobile Station
60 AGND - Reference for analogue audio
ATMS and AFMS are the audio input and output for the module. The
analogue audio signals can be used in two different modes, Handsfree
and Portable Handsfree.
Handsfree
This mode is referred to as Audio To Mobile Station (ATMS) and
Audio From Mobile Station (AFMS). It is used by audio accessories
such as Handsets and Handsfree equipment.
Portable Handsfree
This mode activates a different amplification factor in the Mobile
Equipment (ME). It also activates a microphone bias level in ATMS.
This is the default mode.
3.6.1 Audio To Mobile Station (ATMS)
ATMS is the analogue audio input to the module. It connects to the
audio input of the CODEC in the module. The CODEC then converts
the analogue audio to digital audio, in PCM format, which is
connected to the internal PCM bus in the module. The internal PCM
bus connects the encoded audio to PCMO on the system connector.
ATMS is also used as the microphone input from the Portable
Handsfree. If this is the case, a DC bias is provided from the ATMS.
All sources must be AC-coupled except the Portable Handsfree
microphone, which shall be DC-coupled in order to supply DC current
to the Portable Handsfree microphone. AC coupling prevents inc orrect
biasing or damage of the ATMS input. The capacitor must have a
value greater than shown below to avoid attenuation of low
frequencies.
The ATMS input is a passive network followed by the transmit part of
the CODEC.
GBBA/SEM/BMS 03:0001 Rev A 22
GR47/GR48 Technical description
Parameter Limit
Application driving impedance (0.3 - 3.5 kHz) < 300 Ω
AC coupling capacitance 2 > 1 µF
Module input impedance (0.3 - 3.5 kHz) >50ΚΩ
Low frequency cut-off (- 3 dB) 300 Hz ± 50 Hz
High frequency cut-off (- 3 dB) > 3500 Hz
Maximum allowed input level 1.5Vpp = 530mV
Output DC bias level Handsfree mode 2 V
Portable Handsfree mode 2 V ± 0.1 V
Additional Gain in Portable Handsfree mode 28.5 dB
• Maximum input level at ATMS 245mV
3dBm0.
• The following table is with nominal PGA (Programmable Gain
Settings).
output at PCMO =
rms
• For more information see AT commands in the integrators manual.
Input Input Volts mV
ATMS 245 0 13 3
TXAGC dB AUXI1 Gain PCMO dBm0
rms
Maximum input level at MICI 61.4mV
output at PCMO = 3dBm0
rms
Input Input Volts mV
MICI 61.4 0 25 3
TXAGC dB AUXI1 Gain PCMO dBm0
rms
Output at AUX02 for 3dBm0 at PCMI
Input dBm0 RXPGA Volume
Control dB
PCMI 3dBm0 0 0 436
AUX02 mV
rms
Output at BEAR for 3dBm0 at PCMI
Input dBm0 RXPGA Volume
Control dB
PCMI 3dBm0 0 0 388
BEAR mV
rms
2 AC coupling capacitance must be supplied by the application, unless a DC coupled microphone
is used.
GBBA/SEM/BMS 03:0001 Rev A 23
GR47/GR48 Technical description
3.6.2 Audio From Mobile Station (AFMS)
AFMS is the analogue audio output from the module. When it is
active, the output is derived from the PCM digital audio by the
decoder part of the CODEC. The PCM data comes from PCMI on the
system connector. It is also used as an ear-piece driver for the Portable
Hands Free accessory.
Parameter Limit
Speaker impedance 64 Ω το 1ΚΩ
AFMS Output
Capacitance
Levels (THD < 5 %) Drive capability into 5 kΩ
Drive capability into 1.5
Drive capability into 150 Ω
3.7 Microphone Signals
Pin Speaker signals Dir Function
53 MICP I Microphone Positive Input
54 MICN I Microphone Negative Input
MICP and MICN are the microphone-input pins. These inputs shall be
compatible with an electret microphone. The microphone contains a
FET buffer with open drain output, which must be supplied with at
least +2V relative to ground.
2.2 µF ±10%
> 2.4 Vpp [TBC]
(0.3 - 3.5 kHz)
> 2.2 Vpp [TBC]
kΩ (0.3 - 3.5 kHz)
> 1.3 Vpp [TBC]
(at 1kHz)
Figure 3.3 Microphone connection to module
CCO is the internal source voltage that will provide the necessary
drive current for the microphone (This is not provided by the module).
GBBA/SEM/BMS 03:0001 Rev A 24
GR47/GR48 Technical description
Parameter Limit
CCO 2.0 - 2.5 V
3.8 Speaker Signals
Pin Speaker signals Dir Function
55 BEARP O Microphone Positive Output
56 BEARN O Microphone Negative Output
BEARP and BEARN are the speakers output pins. These outputs are
in differential mode.
3.9 Digital Audio
Pin PCM signal Dir Function
52 PCMCLK O PCM clock
51 PCMSYNC O PCM frame sync
47 PCMULD I PCM audio input to DSP
48 PCMDLD O PCM audio output to DSP
50 PCMI I PCM audio input to Codec
49 PCMO O PCM audio output to Codec
The digital PCM audio signals allow the connection of a digital audio
source / receiver, bypassing the analogue audio CODEC processing
functions performed within the module.
Figure 3. 4 Pin connections to digital audio
GBBA/SEM/BMS 03:0001 Rev A 25
GR47/GR48 Technical description
In the case where no external audio processing is performed, then it is
necessary to connect the following signals at the system connector:
PCMDLD and PCMI
PCMULD and PCMO
Electrical characteristics
The Dig. 2.75 V CMO S Output / Input electrical characteristics shall
apply, with DGND as the reference.
PCM interface format
The PCM format (for PCMULD and PCMDLD) shall follow a linear
PCM data I/O format of an industry standard Texas Instrument DSP.
It is the same format as the one used between the CODEC and the
DSP. The DSP is the source of the bit clock PCMCLK and the frame
synchronisation PCMSYNC. The data bits in PCMULD and
PCMDLD shall be aligned so that the MSB in each word occurs on
the same clock edge.
GBBA/SEM/BMS 03:0001 Rev A 26
GR47/GR48 Technical description
3.10 Serial Data
Pin Name Dir Description RS232
41 TD I Serial data to module 103
42 RD O Serial data from module 104
39 RTS
IO9
I
Request To Send
I/O
General purpose I/O 9
CCITT Nº
105
40 CTS
KeyCOL4
O4
37 DTR
KeyROW1
I/O1
38 DCD
KeyCOL1
O4
36 RI
KeyCOL2
O2
45 TD2 I UART 2 Data Transmission
46 RD2 O UART 2 Data Reception
43 TD3 O UART 3 Data Transmission
44 RD3 I UART 3 Data Reception
O
Clear To Send
O
Key column 4
O
General purpose output 4
I
Data Terminal Ready
I
Keyboard column 1
General purpose I/O 1
O
Data Carrier Detect
O
Key column 1
O
General purpose output 1
O
Ring Indicator
O
Key column 2
O
General output 2
106
108.2
109
125
GBBA/SEM/BMS 03:0001 Rev A 27
GR47/GR48 Technical description
The serial channels are used as asynchronous communication links
between an application system or accessory units connected to the
Module. They consist of three UART's.
• UART 1 – This has full RS232 and is used for all on and off line
communication.
• UART 2 – May be used for interfacing to a GPS unit,
downloading software, receiving logging information, etc.
• UART 3 – May be used by embedded applications.
The Dig. 2.75 V CMOS Output / Input electrical characteristics shall
apply, with DGND as the reference. Extra relevant data is specified
for some of the signals.
The character format supported is, 1 start bit, 8 bit data, non-parity
plus 1 stop bit, in total 10 bits per character.
Note : As stated in section 3.2.1 the module is unable to directly
interface to a 3.3V micro processor.
Note 2 : As can be seen from the pin out table, several of the RS232
pins have multiple functionality , this is user selectable with the RS232
functionality set as default.
GBBA/SEM/BMS 03:0001 Rev A 28
GR47/GR48 Technical description
3.10.1 UART 1 (RS232) - RD, TD, RTS, CTS, DTR, DCD, DSR and RI
The UART1 signals form a 9 pin RS-232 (V.24) serial port.
The signal levels do not match the standard RS-232 (V.28) levels. The
relationship between the levels is shown in the table below
RS - 232 Level RD, TD RTS, CTS, DTR, DCD,
RI
< - 3 V 1 OFF > 1.93
> + 3 V 0 ON < 0.80 V
Conversion between the 2.75V CMOS levels and the RS232 levels
can be achieved using a standard interface IC, such as the Maxim
Integrated Products MAX3237.
2.75 V CMOS
Level
3.10.2 Serial Data Signals - RD, TD
The default baud rate is 9.6 kbit/s, however higher bit rates up to 460
kbit/s are supported and are set by the AT+IPR command. The UART
1 starts at a rate of 9.6 kbit/s in standard AT mode or binary mode
(First received data AT or binary will determine the operation mode).
The GSM 07.10 multiplexing protocol is supported and is started on
command, in this case bit rates up to 460 kbits/s are supported.
Serial Data From Module (RD)
RD is an output used to send data on the UART 1 to the application
system. This is a Dig. 2.75 CMOS Output and general characteristics
are applicable.
Parameter Limit
Application load resistance < 100 kΩ
Application load capacitance
Serial Data To Module (TD)
TD is input (to the module) used by the application system to send
data on the UART 1 to the module. This is a Dig. 2.75 CMOS Input
and general characteristics are applicable.
Parameter Limit
< 500 pF
Application driving impedance < 100 Ω
Input capacitance 1 nF
Input resistance (pull-down) 100 kΩ to 2.75 V
GBBA/SEM/BMS 03:0001 Rev A 29
GR47/GR48 Technical description
3.10.3 Control Signals - RTS, CTS, DTR, DCD, RI , DSR
The control signals are active low, and hence when a standard
interface IC is used (such as MAX3237), then standard RS-232 levels
are obtained.
These signals together with DGND, RD and TD form a 9-pin RS-232
data port (with the exception of the voltage levels).
RTS and CTS shall be capable of transmitting at 1/10 of the data
transmission speed for data rates, up to 460 kbit/s. (Byte oriented flow
control mechanism).
Switching times for RTS and CTS
Parameter Limit
Time from Low to High level < 2 µs
Time from High to Low level < 2 µs
Request to Send (RTS)
RTS is an input to the module. The signals on this circuit are used to
condition the DCE (the module when used for data transmission
purposes) for data transmission. Default level is OFF, by internal pull
up.
The exact behaviour of RTS is defined by the AT+IFC command.
Software or hardware flow control can be selected. Hardware flow
control is the default.
This is a Dig. 2.75 CMOS Input and general characteristics are
applicable.
It is the duty of the application to pull RTS low (logic levels) to
request communications with the module. The module will respond by
asserting CTS low and as such may be used as a notification as a
module status ready for communication.
Parameter Limit
Application driving impedance < 100 Ω
Input capacitance < 2 nF
Input resistance (pull-down) 100 kΩ to DGND
GBBA/SEM/BMS 03:0001 Rev A 30
GR47/GR48 Technical description
Clear To Send (CTS)
CTS is an output from the module. The signals on this circuit are used
to indicate that the DCE (the module when used for data transmission
purposes) is ready to transmit data. Default level is high.
The exact behaviour of CTS is defined by the AT+IFC command.
Software or hardware flow control can be selected.
This is a Dig. 2.75 CMOS Output and general characteristics are
applicable.
Tip: if only software flow control is to be used it becomes necessary
to assert RTS low or to connect RTS to CTS at the module.
Parameter Limit
Application load capacitance < 500 pF
Application load resistance > 1 MΩ
Data Terminal Ready (DTR)
DTR is an input to the module. Signals from the DTE on this circuit
indicate the DTE is ready to transmit and receive data. DTR also acts
as a hardware 'hang-up' so that calls are terminated if DTR is OFF
(high).
Default level is ON (low). The exact behaviour of DTR is defined by
the AT&D command.
This is a Dig. 2.75 CMOS Input and general characteristics are
applicable.
Data Carrier Detect (DCD)
DCD is an output from the module. An ON (low) signal shall indicate
that a valid carrier (data signal) is being received by the DCE
(module). The exact behaviour of DCD is defined by the AT&C
command.
This is a Dig. 2.75 CMOS Output and general characteristics are
applicable.
Ring Indica tor (RI)
RI is an output from the module. An ON (low) signal indicates a
ringing signal is being received by the DCE (module).
This is a Dig. 2.75 CMOS Output and general characteristics are
applicable.
GBBA/SEM/BMS 03:0001 Rev A 31
GR47/GR48 Technical description
DSR (Data Set Ready)
The DSR signal must be switched on using the at&s command. If
DSR is enabled it will indicate an active state (low) if the module is in
command mode and inactive (high) if the module is in on line data
mode.
3.10.4 UART 2 - TD2, RD2
The UART 2 consists of a full duplex serial communication. This
involves the transmission and reception lines.
The communication port shall work in one mode: Operation and
Maintenance mode.
Operation and Maintenance mode shall work in addition with the
SERVICE signal. On switching the module on, if SERVICE signal is
active then two events can happen. If no data is sent to the module,
then the logger is activated. Otherwise, the module shall be ready to
be reprogrammed.
Timing and Electrical signal characteristics equal to UART 1 TD and
RD, except for maximum baud rate that could be increased to 921
kbps.
Transmitted Data 2 (TD2)
TD2 is input (to the module) used by the application system to send
data on the UART 2 to the module.
The electrical characteristics shall be the same as TD.
Received Data 2 (RD2)
RD2 is an output used to send data on the UART 2 to the application
system.
The electrical characteristics shall be the same as RD.
3.10.5 UART 3 - TD3, RD3
The UART 3 consists of a full duplex serial communication. This
involves the transmission and reception lines.
Timing and electrical signals characteristics equal to UART 1 TD and
RD.
GBBA/SEM/BMS 03:0001 Rev A 32
GR47/GR48 Technical description
Transmitted Data 3 (TD3)
TD3 is input (to the module) used by the application system to send
data on the UART 3 to the module.
The electrical characteristics shall be the same as TD.
Received Data 3 (RD3)
RD is an output used to send data on the UART 3 to the application
system.
The electrical characteristics shall be the same as RD.
3.11 SIM Card related signals
Parameter Mode Signal Min. Typ. Max. Uni
SIM supply Voltage 3 V SIMVCC 2.7 3.0 3.3 V
5 V 4.5 5.0 5.5 V
High Level Input
Voltage (VIH)
5 V 3.5 5.0 V
3 V SIMDAT 2.1 3.0 V
t
Low Level Input
Voltage (VIL)
5 V 0 1.5 V
High Level Output
Voltage (VOH)
5 V 4.7 5.0 V
Low Level Output
Voltage (VOL)
5 V 0 0.2 V
High Level Output
Voltage (VOH)
5 V 4.4 5.0 V
Low Level Output
Voltage (VOL)
5 V 0 0.3 V
3 V SIMDAT 0 0.9 V
3 V SIMDAT 2.7 3.0 V
3 V SIMDAT 0 0.2 V
3 V SIMCLK
SIMRST
3 V SIMCLK
SIMRST
2.4 3.0 V
0 0.35 V
GBBA/SEM/BMS 03:0001 Rev A 33
GR47/GR48 Technical description
3.11.1 SIM Detection – SIM Presence
SIMPRESENCE is an input intended to be used to determine whether
a SIM card has been inserted or removed in the external SIM card
holder. It shall be normally wired to the "Card Inserted Switch" of the
external SIM card holder.
When left open an internal pull up resistor maintains the signal high
and means ‘SIM card missing’ to the module. When pulled low the
module assumes a SIM card is inserted.
SIMPRESENCE is a digital CMOS 2.75 input with the following
characteristics.
Parameter Min. Typ. Max. Units
Pull-up resistance (at 2.75 V) 100 kΩ
Low Level Input Voltage (SIM inserted) 0.8 V
High Level Input Voltage (SIM missing) 1.93 5 V
Note : The module has been Type Approved with SIM presence
implemented, to avoid extra testing when type approving the
application this should be designed in.
3.12 Service/Programming
Pin Signal Description
58 SERVICE Flash programming voltage
This input shall be used as a programming vo ltage for the Flash
Memory to initiate and it is also used as a signal to indicate to the
module that it should start outputting logging information.
Mode SERVICE Voltage (V) Drive Capacity
Min. Typ. Max.
Normal Operation 0.8 Service/enable programming 1.9 2.75 3.6 > 1 mA
Absolute maximum voltage 13.5 -
GBBA/SEM/BMS 03:0001 Rev A 34
GR47/GR48 Technical description
3.13 Buzzer
Pin Signal Description
31 Buzzer Buzzer output from the module
This is an output signal which allows the application to use preprogrammed melodies or sounds. Typical use would involve a
transistor buffer with a piezoelectric sounder.
The Dig. 2.75 V CMOS Output electrical characteristics shall apply,
with DGND as the reference.
3.14 LED
Pin Signal Description
33 LED
I/O6
LED Output from module
General purpose I/O 6
This is an output signal which allows the use of an external LED. The
LED shall indicate different states within the module.
This signal is a Dig. 2.75 V CMOS output so general characteristics
are applicable. In order to connect a LED in the external application
the following scheme shall be followed.
The operation of the LED is hardcoded and is not controlled by the
host application.
Figure 3.5 Electrical connection for LED
GBBA/SEM/BMS 03:0001 Rev A 35
GR47/GR48 Technical description
3.15 TX_ON - Burst Transmission
Pin Signal Dir Description
35 TX_ON O GSM module on transmission
The TX_ON is a digital signal output. This shall indicate that the
module is going to transmit the burst. Burst transmission is the time
when a GSM transceiver unit is transmitting in its timeslot assigned
by the network.
Dig 2.75 CMOS Output so general electrical characteristics are
applicable.
3.16 Real Time Clock
The Real Time Clock provides the module with a time -of-day
calendar with alarm and one hundred-year calendar to the main
microprocessor.
The real time clock operates with a separate power supply. Therefore,
two modes of operation shall be distinguished:
• RTC Normal operation: This is when the MS is powered/Vcc
present and it does not take into account if the MS is in OFF or
ON.
• RTC Backup operation: This operation is performed when the MS
is not powered, VCC = 0V. In this case the RTC operation is
maintained by the backup power supply.
The backup power supply is a passive power supply, capacitor,
golden - capacitor, battery etc., which shall be connected outside the
MS to VRTC pin. During the RTC normal operation, the passive
power supply is being charged; this is like charging a capacitor.
In backup operation, the backup source provides with enough voltage
for RTC operations. The following table shows both voltage
operations characteristics.
Parameter Min. Typ. Max. Units
Supply Voltage RTC (Normal Operation –
Charging the capacitance)
Supply Voltage RTC (Backup Operation –
Capacitance provides with voltage)
1.6 1.8 2.0 V
1.0 1.8 2.0 V
Current drawn 5.0 10.0 µA
GBBA/SEM/BMS 03:0001 Rev A 36
GR47/GR48 Technical description
In Back-up operation if the voltage drop below 1 Volt, the RTC shall
stop working. The following diagram shows the RTC connection:
Figure 3.6 RTC connection
3.17 Extended IO capabilities
In order to increase the flexibility and variety of GR47 peripherals, the
RS232 hardware flow control shares its physical interface with the
keypad scanning interface and extended general purpose IO
capability. Due to the nature of this sharing, it is not feasible to
operate all these features concurrently (although, with care, dynamic
switching from one feature to another and back is possible).
When a particular feature is required of an IO, the software
automatically sets the states of the relevant IO blocks disabling one set
and enabling others. This is most noticeable with the RS232 hardware
flow control when switching on the keypad functionality.
If full hardware flow control and handshaking is required there will be
no available keypad column drivers and the keypad interfacing will be
disabled. If intermediate hardware flow control is selected (RTS and
CTS only), the unused flow control pins (DTR, DCD, RI, DSR) are
made available to the keypad interface providing three discrete matrix
column drivers.
If RS232 hardware flow control is switched off altogether, the
remaining keypad column driver is enabled allowing the full keypad
matrix of 5 columns by 4 rows.
3.17.1 LED/IO6
The LED function pin can be used as a general purpose digital IO
when the flashing LED function is not required. However, this pin
does not have an on-board pull-up resistor. It is required that an
external pull-up or pull-down resistor be provided by the host circuitry
when either not used or when used as a digital input.
GBBA/SEM/BMS 03:0001 Rev A 37
GR47/GR48 Technical description
2
.75V
100kO 1kO
>1MO 10nF
2.75V
Analog IC
IO5/ADC4
3.17.2 I#/O#
When not being used for an alternative function the pins labelled I#
and O# may be used for general purpose inputs or outputs
respectively. The inputs have an on-board 100k pull-up resistor and
the outputs are driven rail-to-rail at 2.75V levels.
3.17.3 UART3/IO#
The UART3 pins have been given alternative functions as general
purpose I/O, both pins may be used for either input or output.
However, the TX pin has a 100kO pull-down resistor to ground and
the RX pin has a 100kO pull-up resistor to 2.75V. This must be taken
into consideration when designing the host circuit.
3.17.4 IO#/ADC#
To increase analog input capabilities, the GR47 optimises the IO by
multiplexing or sharing different features on single pins. There are
two digital IO pins which now have an additional ADC input. When
configured as digital IO, the software will not read the voltages at the
two new ADC inputs. When configured as ADC inputs the software
will configure the digital IO pins as input or high impedance tri-state.
In this state any applied voltage between 0V and 2.75V can be read as
an 8 bit value.
Because the additional ADC inputs (ADC4 and ADC5) are common
with digital IO, the input circuit of the ADC is not the same as for the
original circuit s ADC1-3. It is important to understand the input
structure of the pin so that the correct analog voltage is read by the
application. The input structure is provided in figure 3.7. It consists of
a 100kO pull-up to 2.75V followed by a series 1kO and 10nF
capacitor to ground which make a low pass filter with a 3dB roll-off at
about 16kHz. The input impedance of the analog IC is 1MO
minimum.
ADC
Figure 3.7 I nput circuit for combined digital IO and ADC pins
GBBA/SEM/BMS 03:0001 Rev A 38
GR47/GR48 Technical description
3.18 Keyboard interface
To increase IO capabilities, the GR47 optimises the IO by
multiplexing or sharing different features on single pins. The IO has
been extended to allow simple interfacing of a matrix keypad.
3.18.1 IO#/KEYROW#
When configured for keypad operation the software will configure the
digital IO pins as input or high impedance tri-state. In this state, the
keypad matrix row can be read from the KEYROW# inputs. These
pins have a 100kO pull-up to 2.75V and the rows are considered
activated when the voltage is pulled low by the external keypad
switches.
3.18.2 KEYCOL#
The keypad matrix column drivers share functionality with the RS232
hardware flow control signals. When configured for keypad operation
the software will configure the hardware flow control to either
intermediate or off.
With intermediate flow control the number of keypad column outputs
is limited to three, with flow control switched off , the number of
keypad column outputs is increased to four. In addition to the keypad
column outputs it is possible to use a direct ground connection as an
additional column driver, which is interpreted as column zero.
Thus it is possible to create a variety of keypad matrix sizes from
single column to five columns wide.
Finally, a standard keypad matrix directly connects the rows to the
columns whenever a key is depressed. In order to avoid short circuits
if multiple keys are pressed simultaneously, the column drivers must
be open-collector. This must be achieved with external transistors as
the logic drive from the GR47 is rail-to-rail. Suitable transistors for
this interface are of the type with built in bias resistors between base
and emitter.
The method of connection is shown in 3.8 below.
GBBA/SEM/BMS 03:0001 Rev A 39
GR47/GR48 Technical description
GR47
6
5 4 3 2 1
RN1107
RN1107
RN1107
KEYCOL# KEYROW#
Figure 3.8 Keyboard matrix connections
GBBA/SEM/BMS 03:0001 Rev A 40
GR47/GR48 Technical description
4 Antenna Connector
The Antenna Connector is a hub for transmission of the Radio
Frequency (RF) signals from the module to the external customersupplied antenna. It is a MMCX connector that is mounted on the
surface of the module. Most dealers should be able to supply this type
of connector.
This table provides the electrical characteristics at the antenna
interface.
Parameter Limit Description
Nominal impedance
Output Power 2 Watt peak (Class 4) Extended GSM 900
1 Watt peak (Class 1) GSM 1800
Static Sensitivity Better than - 102 dBm Extended GSM 900
Better than - 102 dBm GSM 1800
50 Ω (SWR < 2:1)
GBBA/SEM/BMS 03:0001 Rev A 41
GR47/GR48 Technical description
5 AT Comma nd Summary
The AT standard is a line-oriented command language. "AT" is an
abbreviation of ATtention and it is always used to start sending a
command line from a TE to the TA. TE stands for Terminal
Equipment which is a computer of any size and TA stands for
Terminal Adapter which is the modem part of the module.
The command line consists of a string of alphanumeric characters. It is
sent to the modem to instruct it to perform the commands specified by
the characters.
Functionality AT commands
CONTROL AND IDENTIFICATION
Subscriber Information AT+CNUM, AT+CIMI, AT*ESNU
Product & Release info AT+CGMR, AT+CGSN, AT*ESIR
Generic information & Settings AT, AT*, AT+CLAC, AT+GCAP, ATI, AT+CSCS,
AT&F, AT&W, ATZ, AT+WS46, AT*E2SSN
CALL CONTROL
General call control ATA, ATD, ATL, ATH, ATP, ATT, AT+CHUP,
AT+CMOD, AT+CVHU, AT+CR, AT+CRC,
DTMF AT+VTS
Data commands ATO, AT+CRLP
AUDIO CONTROL
Audio profile modification AT*E2EAMS
Audio profile manipulation AT*EALR, AT*EAMS, AT*EARS, AT*ELAM,
AT*EMIR, AT*EMIC, AT*EXVC, AT*E2APR
NETWORK SERVICES
Alternate Line Service (ALS) AT*EALS, AT*ELIN, AT*ESLN
Customer Service Profile AT*ECSP
Call forwarding AT+CCFC, AT*EDIF
Calling/called number identification AT+CLIP, AT+CLIR, AT*EIPS
Preferred networks AT*EPNR, AT*EPNW
Advice of Charge AT+CACM, AT+CAMM, AT+CAOC, AT+CPUC
Calling cards AT*ESCN
Call hold, waiting & multiparty AT+CCWA, AT+CHLD
Operator selection AT+COPS
GBBA/SEM/BMS 03:0001 Rev A 42
GR47/GR48 Technical description
Network registration AT+CREG
USSD AT+CUSD, AT+CSSN
Security & Locks AT+CLCK, AT+CPWD, AT+CPIN, AT*EPEE
SETTINGS
Restting AT*EMAR
Ring signal settings AT*ERIL, AT*ERIN, AT*ERIP, AT*ESIL,
AT*ESMA, AT*ESMM, AT*ESOM
ME STATUS INFORMATION AT*ECAM, AT+CSQ, AT+CIND, AT+CPAS,
AT+CMER
ERROR CONTROL AT+CMEE, AT+CEER
SMS & CB
Settings AT*ESTL, AT+CPMS, AT+CRES, AT+CSAS,
AT+CSCA, AT+CSMS, AT+CNMI, AT+CSDH,
AT+CSMP, AT+CGSMS
SMS-Command AT+CMGC
Read / write SMS AT+CMGD, AT+CMGW, AT+CMGL, AT+CMGR
Send SMS AT+CMGS, AT+CMSS
PHONEBOOK
Read / write / find AT+CPBS, AT+CPBR, AT+CPBW, AT+CPBF
Groups AT*EGIR, AT*ESAG, AT*ESCG, AT*ESDG,
AT*ESDI, AT*ESGR
Personal Rings AT*EPRR, AT*EPRW
Settings AT*EPBM, AT*E2PBCS
CLOCK
Alarm AT+CALA, AT+CALD, AT+CAPD
Time & Date AT+CCLK, AT+CTZU, AT*EDST
INTERFACE COMMANDS
Flow control AT&C, AT&D, AT+ICF, AT+IFC, AT+IPR, AT&S
S registers ATS0, ATS10, ATS2, ATS3, ATS4, ATS5, ATS6,
ATS7, ATS8
Response control AT+ILRR, ATE, ATV, ATQ, AT+CSCS, ATX
07.10 MULTIPLEXING AT+CMUX
GBBA/SEM/BMS 03:0001 Rev A 43
GR47/GR48 Technical description
HSCSD AT+CHSR, AT+CHSU
GPRS
PDP Context Activation AT+CGACT
GPRS Attachment AT+CGATT
Enter Data State AT+CGDATA
Define PDP Context AT+CGDCONT
GPRS Event Reporting AT+CGEREP
Show PDP Address AT+CGPADDR
Quality of Service Profile (MINIMUM
ACCEPTABLE)
Quality of Service Profile (REQUESTED) AT+CGQREQ
GPRS Network registration Status AT+CGREG
Extension of ATD for GPRS ATD*
AT+CGQMIN
NETWORK INFORMATION
Cell information AT*E2CD
Engineering Mode AT*E2EMM
SIM APPLICATION TOOLKIT
Set Up Call AT*E2STKC
Display Text AT*E2STKD
Get Inkey AT*E2STKG
Get Input AT*E2STKI
Select Item AT*E2STKL
Set Up Menu AT*E2STKM
Envelope (Menu Selection) AT*E2STKN
Application Toolkit Settings AT*E2STKS
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GR47/GR48 Technical description
6 Embedded applications
The module has the capability to store and run customer written code
in the form of a script during the processors idle time , through the use
of an on board interpreter.
6.1 Features
Main features of embedded applications are as follows.
• C based scripting language (SEM specific)
• Over the air upgradeable (scripts, NOT signalling software)
• Library of intrinsic functions
• Multiple on module script support
6.2 Implementation
The module has upto 44k of space available for storage of two scripts
in the scripting language and 25k of operating RAM. Structures
included in this language are
• If - then - else statements
• While loops
• For loops
All hardware interfaces that are normally available to the module
through the AT commands are available to the embedded application.
Further drivers have been written such as M bus and I2C for use by the
EA through the use of the IO pins .
6.2.1 Limitations
Since the module is processing the script using its own memory
limitations are placed onto the scripts that are run.
• A direct comparison cannot be made to a fully compiled C
program in terms of size but a gauge of script size is that if
each line were 128 characters long in the script then the script
could be 350 lines long.
• Processing power is something that needs to be considered as
the script is run as a low priority process within the software.
An option that can be used to stop this controller mode, this
stops GSM operation and provides all processing power for
the script to be run.
• Code cannot be ported directly from an existing application
and loaded directly onto the module. It must be re written in
the SEM script language so that the module interpreter can
function correctly.
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GR47/GR48 Technical description
6.2.2 M2mpower IDE (Integrated Developers Environment)
The IDE is a windows based package which allows the user to write
simulate, de -bug and download their application into a module with
the EA software. The standard version is designed to run on Windows
XP and 2000, other versions are available for 98 if required.
A guide is available for implementing applications using the
developers kit and the EA functionality.
This is a required package to be able to implement an EA.
For further information please contact SEM customer support.
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GR47/GR48 Technical description
7 TCP/IP stack
An on board IP/TCP/UDP stack has been integrated into the software
negating the need for the customer to implement one in their own code
base.
This is going to initially only be accessible through the embedded
applications (see previous section) using intrinsic functions.
7.1 Implementation
There are a number commands allowing various functions, these are
as follows.
• Open/closing IP connection – Negotiates/closes a dynamic IP
address with the web server.
• Send/Receive TCP packets – Performs all TCP operations to
send and receive packets.
• Send/Receive UDP packets – Performs all UDP operations to
send and receive packets.
• Resolve URL to an IP address - Similar to nslookup command
in DOS
When the unit is set up and controlled using the embedded
applications either the EA or an external application can generate data
to be sent and can pass it to the module for transmission.
This effectively provides a transparent communication link to an
internet server from the application over GPRS.
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GR47/GR48 Technical description
40
8 Technical Data
Mechanical specifications
Maximum length: 50 mm
Maximum width: 33 mm
Maximum thickness: 6.82 mm (without system connector pins length)
Weight: 18,5 g
Power supply voltage, normal operation
Voltage: 3.6V Nominal
Tolerance -0.2 +0.4V
Ripple: <100mV @ 200KHz, <20mV @>200KHz
Voltage must always stay within a normal operating range, ripple included.
Power consumption: Speech mode < 250 mA (< 2 A peak)
Idle mode: <5 mA
Powered off: < 100 µA
RTC accuracy: Max < 37ppm
Typical < 20ppm
Radio specifications
Frequency range: GR 47: GSM 900 & EGSM 900 MHz and 1800 MHz (Dual
Band)
GR 48: GSM 850 MHz and 1900 MHz (Dual Band)
Maximum RF output power: 2 W / 1 W
Antenna impedance:
50 Ω
SIM card
SIM card interface (external only)
3 V or 5 V
Environmental specifications
Operating temperature range: -25 0C to +55 0C
Storage temperature range: -40 0C to +85 0C
Maximum relative humidity: 95% at +40 0C
Stationary vibration, sinusoidal: Displacement: 7.5 mm Acceleration amplitude: 20 m/s
m/s2 Frequency range: 2-8 Hz 8-200 Hz 200-500 Hz
Stationary vibration, random Acceleration spectral density (m2/s2): 0.96 2.88 0.96
Frequency range: 5-10 10-200 200-500 60 min per/axis
2
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GR47/GR48 Technical description
In addition the unit can handle as many SMS as the SIM can
Non-stationary vibration, including
shock
Bump: Acceleration 250 m/s2
Free fall transportation: 1.2 m
Rolling pitching transportation: Angle: ±35 degrees, period: 8s
Static load: 10 kPa
Low air pressure/high air pressure: 70 kPa / 106 kPa
Shock response spectrum I, peak acceleration: - 3 shocks in
each axis and direction: 300 m/s2, 11 ms
Shock response spectrum II, peak acceleration: - 3 shocks in
each axis and direction: 1000 m/s2, 6 ms
Storage
SMS Storage capacity 40 in ME
store (SIM dependent).
Phone book capacity 100
DAC
Parameter Value Units
Resolution 8 bit
Output voltage swing for Code=00
Output voltage swing for Code=FF
Nominal Step Size 9.668 ± 0.1 mV
Linear Code Range 8-247 (8H-F7H) LSB
Absolute Error during Linear Range ±100 mV
Conversion Speed <100 µs
0.138 ± 0.1 V
HEX
2.61 ± 0.2 V
HEX
ADC
Parameter Value Units
Resolution 8 bit
Input voltage for Code=00H 0.01 ± 0.01 V
Input voltage for Code=FFH 2.75 ± 0.1 V
Nominal Step Size 10.742 mV
Accuracy ±3 LSB
Input Impedance >1 MΩ
Conversion Time to within 0.5bit <100 µs
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GR47/GR48 Technical description
9 Contact details
To contact customer support please use the details below.
Customer Support
Maplewood Building
Chineham Business Park
Basingstoke
RG24 8YB
E mail :
modules.support@sonyericsson.com
Or
modules.info@sonyericsson.com
GBBA/SEM/BMS 03:0001 Rev A 50
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