Manual
This document is available at HTTP://WWW.FALCOM.DE/ .
I56/I56i
Hardware description
Preliminary
Version 1.00
I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Contents
0 INTRODUCTION ..............................................................5
0.1 GENERAL........................................................................................................................................ 5
0.2 THE DIFFERENCE BETWEEN I56 AND I56I MODULES ....................................................................... 6
0.3 USED ABBREVIATIONS .................................................................................................................... 6
0.4 RELATED DOCUMENTS.................................................................................................................... 9
1 SECURITY .......................................................................10
1.1 GENERAL INFORMATION............................................................................................................... 10
1.2 EXPOSURE TO RF ENERGY............................................................................................................ 10
1.3 EFFICIENT MODEM OPERATION ..................................................................................................... 10
1.4 ANTENNA CARE AND REPLACEMENT ............................................................................................ 11
1.5 DRIVING ....................................................................................................................................... 11
1.6 ELECTRONIC DEVICES................................................................................................................... 11
1.7 VEHICLE ELECTRONIC EQUIPMENT ............................................................................................... 11
1.8 MEDICAL ELECTRONIC EQUIPMENT .............................................................................................. 11
1.9 AIRCRAFT..................................................................................................................................... 11
1.10 CHILDREN..................................................................................................................................... 12
1.11 BLASTING AREAS.......................................................................................................................... 12
1.12 POTENTIALLY EXPLOSIVE ATMOSPHERES ..................................................................................... 12
1.13 NON-IONISING RADIATION............................................................................................................ 12
2 SAFETY STANDARDS ...................................................13
3 TECHNICAL DATA........................................................14
3.1 TECHNICAL SPECIFICATIONS OF GSM/GPRS ENGINE................................................................... 14
3.2 POWER CONSUMPTION FOR I56, ONLY .......................................................................................... 18
3.3 OPERATING TEMPERATURES ......................................................................................................... 18
3.4 AIR INTERFACE OF THE I56 GSM/GPRS ENGINE, ONLY............................................................... 19
4 GSM/GPRS APPLICATION INTERFACE..................20
4.1 DESCRIPTION OF OPERATING MODES ............................................................................................ 20
4.1.1 Normal mode operation ............................................................................................................... 20
4.1.2 Power down ................................................................................................................................. 21
4.1.3 Alarm mode ................................................................................................................................. 21
4.1.4 Charge-only mode ....................................................................................................................... 21
4.1.5 Charge mode during normal operation ........................................................................................ 21
5 HARDWARE INTERFACES .........................................22
5.1 INTERFACES ON THE I56/I56I........................................................................................................ 22
5.2 DESCRIPTION OF THE 50-PIN DOUBLE-ROW CONNECTOR .............................................................. 23
5.3 DETERMINING THE EXTERNAL EQUIPMENT TYPE......................................................................... 26
5.4 SPECIAL FUNCTIONALITY PINS...................................................................................................... 27
5.4.1 Power supply ............................................................................................................................... 27
5.4.2 Power supply pins (3 and 4) on the board-to-board connector .................................................... 27
5.4.3 Power up/down scenarios ............................................................................................................ 28
5.4.4 Automatic shutdown.................................................................................................................... 31
5.5 AUTOMATIC GPRS MULTISLOT CLASS CHANGE .......................................................................... 34
5.6 GSM CHARGING CONTROL ........................................................................................................... 34
5.6.1 Power-Set-Input........................................................................................................................... 35
5.6.2 Battery pack characteristics ......................................................................................................... 35
5.6.3 Recommended battery pack specification.................................................................................... 37
5.6.4 Implemented charging technique................................................................................................. 37
5.6.5 Operating modes during charging................................................................................................ 38
5.6.6 Charger requirements................................................................................................................... 40
5.6.7 Features supported on the first and second serial interfaces of GSM/GPRS engine.................... 40
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
5.6.8 SIM interface ............................................................................................................................... 41
5.7 AUDIO INTERFACE ........................................................................................................................ 44
5.7.1 Microphone circuit....................................................................................................................... 44
5.8 CONTROL SIGNALS ....................................................................................................................... 44
5.8.1 Synchronization signal................................................................................................................. 44
5.8.2 Using the GPIO1 pin to control a status LED.............................................................................. 44
5.8.3 Behaviour of the RING_0 line (ASC0 interface)......................................................................... 45
5.9 POWER SAVING............................................................................................................................. 47
5.9.1 No power saving (AT+CFUN=1) ................................................................................................ 47
5.9.2 NON-CYCLIC SLEEP mode (AT+CFUN=0) ............................................................................ 47
5.9.3 CYCLIC SLEEP mode (AT+CFUN=5, 6, 7, 8) .......................................................................... 48
5.9.4 CYCLIC SLEEP mode AT+CFUN=9......................................................................................... 48
5.9.5 Timing of the CTS signal in CYCLIC SLEEP modes................................................................. 49
5.9.6 Wake up I56/I56i from SLEEP mode.......................................................................................... 50
5.10 SUMMARY OF STATE TRANSITIONS (EXCEPT SLEEP MODE)......................................................... 51
5.10.1 Summary of POWER DONE and Normal Mode ........................................................................ 51
5.10.2 Summary of Alarm Mode............................................................................................................ 51
5.10.3 Resetting the GSM module by AT+CFUN=1,1........................................................................... 52
5.11 GSM 07.05 AND 07.07 COMMANDS ............................................................................................. 52
6 EMC AND ESD REQUIREMENTS...............................53
7 RF EXPOSURES..............................................................54
8 FIRST STEPS TO MAKE IT WORKS..........................55
8.1 MINIMUM SET-UP CONNECTION .................................................................................................... 55
8.1.1 Mounting the I56/I56i.................................................................................................................. 55
8.1.2 Antenna interface......................................................................................................................... 55
8.1.3 SIM interface ............................................................................................................................... 56
8.1.4 Serial communication signals ...................................................................................................... 56
8.1.5 Power supply ............................................................................................................................... 57
8.1.6 Turn on the GSM/GPRS engine of I56/I56i ................................................................................ 58
9 HOUSING .........................................................................59
10 CONNECTOR SUPPLIER AND PERIPHERAL
DEVICES ..........................................................................60
10.1 50-PIN CONNECTOR ...................................................................................................................... 60
10.2 GSM ANTENNA............................................................................................................................ 60
10.3 THE SIM CARD HOLDER ............................................................................................................... 61
11 GSM EVALUATION KIT (GSM EVAL-KIT) .............62
Version history
Version number Author Changes
1.00 Fadil Beqiri Initial version
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Cautions
Information furnished herein by FALCOM is believed to be accurate
and reliable. However, no responsibility is assumed for its use. Also
the information contained herein is subject to change without notice.
Please, read carefully the safety precautions.
If you have any technical questions regarding this document or the
product described in it, please contact your vendor.
General information about FALCOM and its range of products is
available at the following internet address: http://www.falcom.de/
Trademarks
Some mentioned products are registered trademarks of their respective
companies.
Copyright
The I56/I56i hardware description is copyrighted by FALCOM
GmbH with all rights reserved. No part of this user’s guide may be
produced in any form without the prior written permission of
FALCOM GmbH.
FALCOM GmbH.
No patent liability is assumed with respect to the use of the information
contained herein.
This confidential document is the property of FALCOM GmbH and may not be copied or circulated without permission.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
0 Introduction
0.1 General
The I56/I56i is designed for use on any GSM network in the world. The
I56/I56i is a tri band GSM/GPRS engine that works on three frequencies
GSM 850 MHz, DCS 1800 MHz and PCS 1900 MHz.
This full type approved integrated modem constitutes a self contained, fully
integrated implementation of the GSM/GPRS. I56/I56i features GPRS class
B, class 10 (making download at speeds up to 85 kbps) and supports the
GPRS coding schemes CS-1, CS-2, CS-3 and CS-4.
The I56/I56i module incorporates all you need to create high-performance
GSM/GPRS solutions; base band processor, power supply ASIC, complete
radio frequency circuit including a power amplifier, internal and external
SIM interfaces and an antenna interface as well.
The physical interface to the cellular application is made through a board-to-
board connector. It consists of 50 pins, required for controlling the unit,
transferring data and audio signals and providing power supply lines.
The external dual band or triple band antenna can directly be connected to
the integrated 50 connector on the side of module.
The I56/I56i is a mobile station for transmission of voice, data calls and
FAX as well as short messages (SMS - Short Message Service) in GSM
Network.
For battery powered applications, I56/I56i features a charging control which
can be used to charge a Li-Ion battery. The charging circuit must be
implemented external the module on your application platform.
To control the GSM module there is an advanced set of AT commands
according to GSM ETSI (European Telecommunications Standards
Institute) 07.07 and 07.05 implemented.
Figure 1: Views (front and back side) of I56/I56i
Users are advised to proceed quickly to the „Security“ chapter and read the
hints carefully.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
0.2 The difference between I56 and I56i modules
I56 The I56 is a Tri-band device which operates in three frequencies
GSM 850 MHz, DCS 1800 MHz and PCS 1900 MHz, and is
available to use in the American Networks. However, the I56
module contains 1800 MHz GSM functions that is not operational
(must not be used) in U.S. Territories. This filing is only applicable
for 850MHz GSM/1900 MHz PCS operations, whereby only these
frequencies (850MHz GSM/1900 MHz PCS) are possible to be used
in U.S. Territories.
I56i The I56i is also a Tri-band device which operates on three
frequencies GSM 850 MHz, DCS 1800 MHz and PCS 1900 MHz,
and is available to use in the American Networks. However, the I56i
module contains 1800 MHz GSM functions that is not operational
(must not be used) in U.S. Territories. This filing is only applicable
for 850MHz GSM/1900 MHz PCS operations, whereby only these
frequencies (850MHz GSM/1900 MHz PCS) are possible to be used
in U.S. Territories. The I56i provides a specific soft- and hardware
(internal TCP/IP stack software with hardware extension) which has
been internally implemented for using the embedded TCP/IP stack
software. The I56i module comes without modification regarding to
the 50-pin board-to-board connector.
The integration of TCP/IP stack with hardware extension (a
TCP/IP-module added) into the equipment converts it to a stand-
alone client that can be connected to the internet through any GSM
850/1800/1900 network. The module can also send and receive data
by GSM and GPRS network using TCP/IP stack. It supports SMS,
DATA and FAX calls. The I56i module can be easily controlled by
using AT or TCP commands. The “TCP Command Set” manual is
also issued as separate document and is available on the distributed
CD for the I56i’s users.
Please note that, according to your requirement you can choose the desired
device.
0.3 Used abbreviations
Abbreviation Description
AD Analogue/Digital
ADC Analogue-to-Digital Converter
AFC Automatic Frequency Control
AGC Automatic Gain Control
AMP Advanced Power Management
ANSI American National Standards Institute
ARFCN Absolute Radio Frequency Channel Number
ARP Antenna Reference Point
ASC0 Asynchronous Controller. Abbreviations used for serial interface of
I56/I56i
ASIC Application Specific Integrated Circuit
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Abbreviation Description
B2B Board-to-board connector
BER Bit Error Rate
BTS Base Transceiver Station
CB or CBM Cell Broadcast Message
CE Conformité Européene (European Conformity)
CHAP Challenge Handshake Authentication Protocol
CPU Central Processing Unit
CS Coding Scheme
CSD Circuit Switched Data
CTS Clear to Send
DAC Digital-to-Analogue Converter
dBW Decibel per Watt
dBm0 Digital level, 3.14 dBm0 corresponds to full scale, see ITU G.711,
A-law
DCE Data Communication Equipment
DRX Discontinuous Reception
DSP Digital Signal Processor
DSR Data Set Ready
DTE Data Terminal Equipment (typically computer, terminal, printer or,
for example, GSM application)
DTR Data Terminal Ready
DTX Discontinuous Transmission
EFR Enhanced Full Rate
EGSM Enhanced GSM
EMC Electromagnetic Compatibility
ESD Electrostatic Discharge
ETS European Telecommunication Standard
FCC Federal Communications Commission (U.S.)
FDMA Frequency Division Multiple Access
FR Full Rate
GMSK Gaussian Minimum Shift Keying
GPRS General Packet Radio Service
GSM Global Standard for Mobile Communications
HiZ High Impedance
HR Half Rate
I/O Input/Output
IC Integrated Circuit
IF Intermediate Frequency
IMEI International Mobile Equipment Identity
ISO International Standards Organization
ITU International Telecommunications Union
kbps kbits per second
LED Light Emitting Diode
LNA Low Noise Amplifier
Mbps Mbits per second
MMI Man Machine Interface
MO Mobile Originated
MS Mobile Station (GSM engine), also referred to as TE
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Abbreviation Description
MSISDN Mobile Station International ISDN number
MSK Minimum Shift Key
MT Mobile Terminated
NC Not Connected
PA Power Amplifier
PAP Password Authentication Protocol
PBCCH Packet Switched Broadcast Control Channel
PCB Printed Circuit Board
PCL Power Control Level
PCM Pulse Code Modulation
PCN Personal Communications Network, also referred to as DCS 1800
PCS Personal Communication System, also referred to as GSM 1900
PDU Protocol Data Unit
PLL Phase Locked Loop
PPP Point-to-point protocol
PSU Power Supply Unit
R&TTE Radio and Telecommunication Terminal Equipment
RAM Random Access Memory
RF Radio Frequency
RMS Root Mean Square (value)
ROM Read-only Memory
RP Receive Protocol
RTC Real Time Clock
Rx Receive Direction
SAR Specific Absorption Rate
SELV Safety Extra Low Voltage
SIM Subscriber Identification Module
SMS Short Message Service
SRAM Static Random Access Memory
TA Terminal adapter (e.g. GSM engine)
TDMA Time Division Multiple Access
TE Terminal Equipment, also referred to as DTE
Tx Transmit Direction
UART Universal asynchronous receiver-transmitter
URC Unsolicited Result Code
USSD Unstructured Supplementary Service Data
VSWR Voltage Standing Wave Ratio
WAAS Wide Area Augmentation System
FD SIM fix dialing phonebook
LD SIM last dialing phonebook (list of numbers most recently dialed)
MC Mobile Equipment list of unanswered MT calls (missed calls)
ME Mobile Equipment phonebook
ON Own numbers (MSISDNs) stored on SIM or ME
RC Mobile Equipment list of received calls
SM SIM phonebook
Table 1: Used abbreviations
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
0.4 Related documents
1. ETSI GSM 07.05: “Use of Data Terminal Equipment-Data Circuit
terminating Equipment interface for Short Message Service and Cell
Broadcast Service”
2. ETSI GSM 07.07 “AT command set for GSM Mobile Equipment”
3. ITU-T V.25ter “Serial asynchronous automatic dialling and control”
4. I56/I56i AT Command Set
5. gprs_startup_user_guide_rev_1.00_preliminary
6. I56i TCP Command Set
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
1 Security
IMPORTANT FOR THE EFFICIENT AND SAFE OPERATION OF
YOUR GSM MODEM, READ THIS INFORMATION BEFORE USE!
Your cellular engine I56/I56i is one of the most exciting and innovative
electronic products ever developed. With it you can stay in contact with
your office, your home, emergency services and others, wherever service is
provided.
This chapter contains important information for the safe and reliable use of
the I56/I56i. Please read this chapter carefully before starting to use the
cellular engine I56/I56i.
1.1 General information
Your I56/I56i modem utilises the GSM standard for cellular technology.
GSM is a newer radio frequency („RF“) technology than the current FM
technology that has been used for radio communications for decades. The
GSM standard has been established for use in the European community and
elsewhere.
Your modem is actually a low power radio transmitter and receiver. It sends
out and receives radio frequency energy. When you use your modem, the
cellular system handling your calls controls both the radio frequency and the
power level of your cellular modem.
1.2 Exposure to RF energy
There has been some public concern about possible health effects of using
GSM modem. Although research on health effects from RF energy has
focused for many years on the current RF technology, scientists have begun
research regarding newer radio technologies, such as GSM. After existing
research had been reviewed, and after compliance to all applicable safety
standards had been tested, it has been concluded that the product is fit for
use.
If you are concerned about exposure to RF energy there are things you can
do to minimise exposure. Obviously, limiting the duration of your calls will
reduce your exposure to RF energy. In addition, you can reduce RF
exposure by operating your cellular modem efficiently by following the
guidelines below.
1.3 Efficient modem operation
In order to operate your modem at the lowest power level, consistent with
satisfactory call quality please take note of the following hints.
If your modem has an extendible antenna, extend it fully. Some models
allow you to place a call with the antenna retracted. However, your
modem operates more efficiently with the antenna fully extended.
Do not hold the antenna when the modem is „IN USE“. Holding the
antenna affects call quality and may cause the modem to operate at a
higher power level than needed.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
1.4 Antenna care and replacement
Do not use the modem with a damaged antenna. If a damaged antenna
comes into contact with the skin, a minor burn may result. Replace a
damaged antenna immediately. Consult your manual to see if you may
change the antenna yourself. If so, use only a manufacturer-approved
antenna. Otherwise, have your antenna repaired by a qualified technician.
Use only the supplied or approved antenna. Unauthorised antennas,
modifications or attachments could damage the modem and may contravene
local RF emission regulations or invalidate type approval.
1.5 Driving
Check the laws and regulations on the use of cellular devices in the area
where you drive. Always obey them. Also, when using your modem while
driving, please pay full attention to driving, pull off the road and park before
making or answering a call if driving conditions so require. When
applications are prepared for mobile use they should fulfil road-safety
instructions of the current law!
1.6 Electronic devices
Most electronic equipment, for example in hospitals and motor vehicles is
shielded from RF energy. However, RF energy may affect some
malfunctioning or improperly shielded electronic equipment.
1.7 Vehicle electronic equipment
Check your vehicle manufacturer’s representative to determine if any on
board electronic equipment is adequately shielded from RF energy.
1.8 Medical electronic equipment
Consult the manufacturer of any personal medical devices (such as
pacemakers, hearing aids, etc.) to determine if they are adequately shielded
from external RF energy.
Turn your I56/I56i modem OFF in health care facilities when any
regulations posted in the area instruct you to do so. Hospitals or health care
facilities may be using RF monitoring equipment.
1.9 Aircraft
Turn your I56/I56i OFF before boarding any aircraft.
Use it on the ground only with crew permission.
Do not use it in the air.
To prevent possible interference with aircraft systems, Federal Aviation
Administration (FAA) regulations require you to have permission from a
crew member to use your modem while the plane is on the ground. To
prevent interference with cellular systems, local RF regulations prohibit
using your modem whilst airborne.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
1.10 Children
Do not allow children to play with your I56/I56i modem. It is not a toy.
Children could hurt themselves or others (by poking themselves or others in
the eye with the antenna, for example). Children could damage the modem
or make calls that increase your modem bills.
1.11 Blasting areas
To avoid interfering with blasting operations, turn your unit OFF when in a
“blasting area” or in areas posted: „turn off two-way radio“. Construction
crew often use remote control RF devices to set off explosives.
1.12 Potentially explosive atmospheres
Turn your I56/I56i modem OFF when in any area with a potentially
explosive atmosphere. It is rare, but your modem or its accessories could
generate sparks. Sparks in such areas could cause an explosion or fire
resulting in bodily injury or even death.
Areas with a potentially explosive atmosphere are often, but not always,
clearly marked. They include fuelling areas such as petrol stations; below
decks on boats; fuel or chemical transfer or storage facilities; and areas
where the air contains chemicals or particles, such as grain, dust or metal
powders.
Do not transport or store flammable gas, liquid or explosives, in the
compartment of your vehicle which contains your modem or accessories.
Before using your modem in a vehicle powered by liquefied petroleum gas
(such as propane or butane) ensure that the vehicle complies with the
relevant fire and safety regulations of the country in which the vehicle is to
be used.
1.13 Non-ionising radiation
As with other mobile radio transmitting equipment users are advised that for
satisfactory operation and for the safety of personnel, it is recommended that
no part of the human body be allowed to come too close to the antenna
during operation of the equipment.
The radio equipment shall be connected to the antenna via a non-radiating
50 Ohm coaxial cable.
The antenna shall be mounted in such a position that no part of the human
body will normally rest close to any part of the antenna. It is also
recommended to use the equipment not close to medical devices as for
example hearing aids and pacemakers.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
2 Safety standards
This GSM modem complies with all applicable RF safety standards.
The embedded GMS modem meets the safety standards for RF receivers
and the standards and recommendations for the protection of public
exposure to RF electromagnetic energy established by government bodies
and professional organisations, such as directives of the European
Community, Directorate General V in matters of radio frequency
electromagnetic energy.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
3 Technical data
3.1 Technical specifications of GSM/GPRS engine
Power supply:
Supply voltage +5 V DC ±10 % (see chapter 3.2
for further details)
Power saving (GSM):
Minimizes power consumption in SLEEP mode
to 13 mA
Charging:
Supports charging control for Li-Ion battery for
the GSM/GPRS engine of the module
Temperature range:
Normal operation: -20 °C to +55 °C (see chapter
3.3 for further details)
Evaluation kit:
The I56/I56i Evaluation Kit is designed to test
consider it as a Reference-Design for your HW-
application, thus, you can save time and money.
In this way you can reduce the Time-To-Market
(see chapter 11).
Physical characteristics:
Size: 60.1 ± 0.15 mm x 40.0 ± 0.15 mm x 9.4 ±
0.15 mm (for more details see chapter 5.
Housing)
Weight: 40 ± 2 g
I56i firmware upgrade:
I56i firmware upgradeable over serial interface
Frequency bands:
Tri-band: GSM 850, GSM 1800, GSM 1900
Compliant to GSM Phase 2/2+
GSM class:
Small MS
Transmit power:
Class 4 (2 W) at GSM850
Class 1 (1 W) at GSM 1800 and GSM 1900
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
GPRS connectivity:
GPRS multi-slot class 10
GPRS mobile station class B
DATA:
GPRS ⇒
GPRS data downlink transfer: max. 85.6 kbps
(see table 3).
GPRS data uplink transfer: max. 42.8 kbps (see
table 3).
Coding scheme: CS-1, CS-2, CS-3 and CS-4.
I56/I56i supports the two protocols PAP
(Password Authentication Protocol) and CHAP
(Challenge Handshake Authentication Protocol)
commonly used for PPP connections.
Support of Packet Switched Broadcast Control
Channel (PBCCH) allows you to benefit from
enhanced GPRS performance when offered by
the network operators.
CSD ⇒
CSD transmission rates: 2.4, 4.8, 9.6, 14.4 kbps,
non-transparent, V.110.
Unstructured Supplementary Services Data
(USSD) support.
WAP ⇒
WAP compliant.
SMS:
MT, MO, CB, Text and PDU mode
SMS storage: SIM card plus 25 SMS locations in
the mobile equipment
Transmission of SMS alternatively over CSD or
GPRS. Preferred mode can be user-defined.
MMS:
MMS compliant
FAX:
Group 3: class 1, class 2
SIM interface:
Supported SIM card: 3 V
Integrated SIM card slot (for small SIM card,
only)
External SIM interface, which can be connected
via provided pins on the 40-pin board-to-board
connector (note that extra card reader is not part
of I56/I56i)
Casing:
Fully shield
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Temperature control
and auto switch-off:
Constant temperature control prevents damage to
I56/I56i when the specified temperature is
exceeded. When an emergency call is in progress
the automatic temperature shutdown
functionality is deactivated. (see chapter 3.3 for
further details)
External antenna:
Connected via 50 Ohm antenna connector.
Audio interfaces:
An analogue audio interface
Audio features:
Speech code modes:
Half Rate (ETS 06.20)
Full Rate (ETS 06.10)
Enhanced Full Rate (ETS 06.50/06.60/06.80)
Adaptive Multi Rate (AMR)
Handsfree operation
Echo cancellation
Noise reduction
One serial interface (ASC0):
2.65V level, bi-directional bus for AT
commands and data
ASC0full-featured 8-wire serial interface.
Supports RTS0/CTS0 hardware handshake and
software XON/XOFF flow control. Multiplex
ability according to GSM 07.10 Multiplexer
Protocol.
Baud rate: 300 bps ... 230 kbps on ASC0
Autobauding detects 1200, 2400, 4800, 9600,
19200, 38400, 57600, 115200, 230400 bps
Phonebook management:
Supported phonebook types: SM, FD, LD, MC,
RC, ON, ME
SIM Application Toolkit:
Supports SAT class 3, GSM 11.14 Release 98
Ringing tones:
Offers a choice of 7 different ringing
tones/melodies, easily selectable with AT
command
Real time clock:
Implemented
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Timer function:
Programmable via AT command
Support of TTY/CTM:
To benefit from TTY communication via GSM,
CTM equipment can be connected to one of the
three audio interfaces.
Internal memory for I56i, only:
Combo-Memory (2 MB Flash–512 KB SRAM)
Software for I56i, only:
TCP/IP stack (Internet protocols stack which
handles the Internet's link, network, transport
and application layers). The embedded software
interface that runs on I56i module for
establishing an internet connectivity using IP
commands. TCP/IP software description is also
available.
Coding scheme 1 Timeslot 2 Timeslots 4 Timeslots
CS-1: 9.05 kbps 18.1 kbps 36.2 kbps
CS-2: 13.4 kbps 26.8 kbps 53.6 kbps
CS-3: 15.6 kbps 31.2 kbps 62.4 kbps
CS-4: 21.4 kbps 42.8 kbps 85.6 kbps
Table 2: Coding schemes and maximum net data rates over air interface
Please note that the values listed above are the maximum ratings which, in practice, are
influenced by a great variety of factors, primarily, for example, traffic variations and
network coverage.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
3.2 Power consumption for I56, only
POWER CONSUMPTION
Min Typ. Max Unit Description
GSM/GPRS engine
Supply voltage 4.7 5 5.2 V
Voltage must stay within the min/max
values, including voltage drop, ripple
and spikes.
Average supply current
50 100 µA POWER DOWN mode
9 mA SLEEP mode @ DRX = 6
MODE BAND (I56/I56I)
15 GSM 850
15 mA IDLE mode GSM 1800/1900
250 GSM 850*)
GSM
170 mA TALK mode GSM 1800/1900**)
15 GSM 850
15 mA IDLE GPRS GSM 1800/1900
290 GSM 850*)
220 mA DATA mode GPRS,
(4 Rx, 1 Tx) GSM 1800/1900**)
440 GSM 850*)
GPRS
310 mA DATA mode GPRS,
(3 Rx, 2 Tx) GSM 1800/1900**)
Peak supply
current. 1.6 A Power control level
During transmission slot every 4.6 ms.
Table 3: Power supply
*) Power Control Level (PCL 5).
**) Power Control Level (PCL 0).
3.3 Operating temperatures
Parameter Min Typ. Max Unit
Ambient temperature (according to GSM
11.10)
-20 25 50 °C
Restricted operation *) -25 to -20
55 to 70
°C
Automatic shutdown
I56/I56i board temperature -29 °C
>70 °C
Table 4: Operating temperature
*) I56/I56i works, but deviations from the GSM specification may occur.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
3.4 Air interface of the I56 GSM/GPRS engine, only
Test conditions:
All measurements have been performed at Tamb = 25 °C, VVC5 typ. = 5 V.
Parameter Min Typ. Max Unit
GSM 850 824 849 MHz Frequency range
Uplink (MS BTS) GSM 1800 1710 1785 MHz
GSM 1900 1850 1910 MHz
GSM 850 869 894 MHz
Frequency range
Downlink (BTS MS) GSM 1800 1805 1880 MHz
GSM 1900 1930 1990 MHz
GSM 850 31 33 35 dBm
GSM 1800 28 30 32 dBm
RF power @ ARP with 50
load GSM 1900 28 30 32 dBm
GSM 850 124
GSM 1800 374
Number of carriers
GSM 1900 299 dBm
GSM 850 45 MHz
GSM 1800 95 MHz
Duplex spacing
GSM 1900 80 MHz
Carrier spacing 200 kHz
Multiplex, Duplex TDMA/FTDMA, FDD
Time slots per TDMA frame 8
Frame duration 4.615 ms
Time slot duration 577 µs
GMSK
GSM 850 -102 -107 dBm
GSM 1800 -102 -106 dBm
Modulation
Receiver input sensitivity @
ARP
BER Class II < 2.4 % GSM 1900 -102 -105.5 dBm
Table 5: Air Interface
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
4 GSM/GPRS application interface
4.1 Description of operating modes
The chapter below briefly summarizes the various operating modes referred to
in the following chapters.
Definition of the GPRS class B mode of operation:
The definition of GPRS class B mode is, that the MS can be attached to both
GPRS and other GSM services, but the MS can only operate one set of
services at a time. Class B enables making or receiving a voice call, or
sending/receiving an SMS during a GPRS connection. During voice calls or
SMS, GPRS services are suspended and then resumed automatically after the
call or SMS session has ended.
4.1.1 Normal mode operation
4.1.1.1 GSM/GPRS SLEEP
Various power save modes set with AT+CFUN command. Software is active to
minimum extent. If the module was registered to the GSM network in IDLE
mode, it is registered and paging with the BTS in SLEEP mode, too. Power
saving can be chosen at different levels: The NON-CYCLIC SLEEP mode
(AT+CFUN=0) disables the AT interface. The CYCLIC SLEEP modes
AT+CFUN=5,6,7,8 and 9 alternatively activate and deactivate the AT
interfaces to allow permanent access to all AT commands.
4.1.1.2 GSM IDLE
Software is active. Once registered to the GSM network, paging with BTS is
carried out. The module is ready to send and receive.
4.1.1.3 GSM TALK
Connection between two subscribers is in progress. Power consumption
depends on network coverage individual settings, such as DTX off/on,
FR/EFR/HR, hopping sequences, antenna.
4.1.1.4 GPRS IDLE
Module is ready for GPRS data transfer, but no data is currently sent or
received. Power consumption depends on network settings and GPRS
configuration (e.g. multislot settings).
4.1.1.5 GPRS DATA
GPRS data transfer in progress. Power consumption depends on network
settings (e.g. power control level), uplink/downlink data rates and GPRS
configuration (e.g. used multislot settings).
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
4.1.2 Power down
Normal shutdown after sending the AT^SMSO command. The Power Supply
ASIC (PSU-ASIC) disconnects the supply voltage from the base band part of
the circuit. Only a voltage regulator in the PSU-ASIC is active for powering
the RTC. Software is not active. The serial interfaces are not accessible.
Operating voltage (connected to VC5) remains applied.
4.1.3 Alarm mode
Alarm mode restricted operation launched by RTC alert function while the
module is in POWER DOWN mode. Module will not be registered to GSM
network. Limited number of AT commands is accessible.
4.1.4 Charge-only mode
Limited operation for battery powered applications. Enables charging while
module is detached from GSM network. Limited number of AT commands is
accessible. There are several ways to launch Charge-only mode:
From POWER DOWN mode: Connect charger to the charger input
pin of the external charging circuit and the POWER pin of module
when I56/I56i was powered down by AT^SMSO.
From Normal mode: Connect charger to the charger input pin of the
external charging circuit and the POWER pin of module, then enter
AT^SMSO.
4.1.5 Charge mode during normal operation
Normal operation (SLEEP, IDLE, TALK, GPRS IDLE, and GPRS DATA) and
charging are running in parallel. Charge mode changes to Charge-only mode
when the module is powered down before charging has been completed.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
5 Hardware interfaces
5.1 Interfaces on the I56/I56i
In figure 2 the interfaces of the I56/I56i module are to be seen
Figure 2: Provided interfaces on the I56/I56i module
Interface specifications
Interface A 50 pin connector Samtec (SMT)
Interface B GSM 50 Ω, MCCX connector
Interface C card reader for small SIM cards (3 V)
Interface D holes for fixing after mounting
recommended screws: 2.2 x 16 mm
The screw could be longer and it depends on the customer’s
application.
Table 6: Interface specifications
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
5.2 Description of the 50-pin double-row connector
Please note that the reference voltages listed in table 7 are the values measured
directly on the I56/I56i module. I56/I56i module is equipped with a 50-pin
board-to-board connector that connects to the cellular application platform.
The Samtec (SMT) board-to-board connector is a 50-pin double-row
receptacle. The names and the positions of the pins can be seen from figure 3
below which shows the bottom view of I56/I56i.
This interface incorporates several sub-interfaces described in chapters below.
To avoid any mistake on structured table below, note that, all sub-interfaces
included on the board-to-board connector are grouped, sequencing is not taken
into account.
Figure 3: Pin assignment on the 50-pin connector (bottom view on I56/I56i)
PIN GSM Modem I/O DESCRIPTION LEVEL
1
2
6
21
24
GND -
Negative operating
voltage (grounds).
One of these pins can also
be used as SIMGND pin
for an external SIM
interface.
0 V
3
4
VC5 I
Power supply input. 5
VC5 pins to be connected
in parallel. 5 GND pins to
be connected in parallel.
The power supply must be
able to meet the
requirements of current
consumption in a Tx burst
(up to 2 A). Sending with
two Timeslots doubles the
duration of current pulses
to 1154 µs (every
4.616 ms)!
VI = +5 V ±10 %
Imax < 2 A (during Tx burst)
1 x Tx, peak current 577 µs
every 4.616 ms
2 x Tx, peak current
1154 µs every 4.616 ms
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
28 RX_O O
25 TX_O I
27 DSR_O O
9 RING_O O
30 RTS_O I
29 DTR_O I
13 CTS_O O
5 DCD_O O
The serial interface
(ASC0) for AT
commands or data stream.
To avoid floating if output
pins are high-impedance,
use pull-up resistors tied
to external power source
(Vmin< 2.2 and Vmax = 3.3
V, Imax = 10 mA) or pull-
down resistors tied to
GND. See
chapter 5.4.3.5.
If not used leave it open.
VOLmax = 0.2 V at I = 1 mA
VOHmin = 2.35V at I = -1mA
VOHmax = 2.73V
VILmax = 0.5 V
VIHmin = 1.95 V,
VIhmax = 3.3 V
DTR_0, RTS_0: Imax = -90
µA at VIN = 0 V
TX_0: Imax = -30 µA at VIN
= 0 V
12 SPK1P O(+)
14 SPK1N O(-)
Analogue audio interfaces
Balanced audio output.
Can be used to directly
operate an earpiece.
If not used leave it open.
VOmax = 1.3 Vpp
20 MIC1P I(+)
22 MIC1N I(-)
Balanced microphone
input. Can be used to
directly feed an active
microphone.
If not used leave it open.
RI 50 k differential
VImax = 20 mVpp
10 SPK2P O(+)
8 SPK2N O(-)
Analogue audio interfaces
Balanced audio output.
Can be used to directly
operate an earpiece.
If not used leave it open.
VOmax = 1.3 Vpp
16 MIC2P I(+)
18 MIC2N I(-)
Balanced microphone
input. Can be used to
directly feed an active
microphone.
If not used leave it open.
RI 50 k differential
VImax = 20 mVpp
48 SIMPRES I
VILmax = 0.5 V
VIHmin = 2.15 V at I = 20µA,
VIHmax= 3.3 V at I = 30 µA
46 SIMRST O
SIM interface
SIMPRES = high, SIM
card holder closed (no
card recognition).
Maximum cable length
200 mm to SIM card
holder.
VOLmax = 0.25 V at I = 1 mA
VOHmin = 2.3 V at I = -1 mA
VOHmax = 2.73 V
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
49 SIMDATA I/O
VILmax = 0.5 V
VIHmin = 1.95 V,
VIhmax = 3.3 V
VOLmax = 0.4 V at I = 1 mA
VOHmin = 2.15V at I = -1mA
VOHmin = 2.55V at I = -20
µA
VOHmax = 2.96 V
45 SIMCLK O
VOLmax = 0.4 V at I = 1 mA
VOHmin = 2.15V at I = -1mA
VOHmax = 2.73 V
47 SIMVCC O
All signals of SIM
interface
are protected against ESD
with a special diode array.
One of GND’s (pins
1,2,6,21 and 24) can also
be used as SIMGND pin).
SIMVCCmin = 2.84 V,
SIMVCCmax = 2.96 V
Imax = -20 mA
41 PWRSET I
Power set input
to charge the battery set it
to high level, else set it to
low level.
If not used leave it open.
”H” = VC5
”L” = 0 - 0.8 V DC
50 POWER I
This line signals to the
processor that the charger
is connected.
If not used leave it open.
VImin = 3.0 V
VImax = 15 V
17 BAT-Temp I
Input to measure the
battery temperature over
NTC resistor. NTC should
be installed inside or near
battery pack to enable the
charging algorithm and
deliver temperature
values.
If not used leave it open.
Connect NTC with RNTC
10 kΩ @ 25 °C to ground.
11 GPIO1 O
Indicates increased
current consumption
during uplink
transmission burst. Note
that timing is different
during handover.
Alternatively used to
control status LED (see
chapter 5.8.2).
If not used leave it open.
VOLmax = 0.2 V at I = 1 mA
VOHmin = 2.35V at I = -1mA
VOHmax = 2.73 V
1 Tx, 877 µs impulse each
4.616 ms and
2 Tx, 1454 µs impulse each
4.616 ms, with 300 µs
forward time.
7 GPIO2** - NC --
26 GPIO0 - NC --
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
23 BOOT* I
Set this pin to high level
for reprogramming the
flash of the TCP-chip (for
instance updating a new
firmware TCP/IP stack).
19 RESET I Reset - active Low input
VRESET = 0 V
15 SOFT-ON I
Input to switch the
module ON. The line
must be SET to HIGH for
100 ms.
VOpenmin = 2.5 V
VOpenmax = VC5
ON ~~~||~~~ Active
HIGH 100 ms
31 COL3
32 COL4
33 COL1
34 COL2
35 ROW4
36 COL0
37 ROW2
38 ROW3
39 ROW0
40 ROW1
42 SPI_EN
43 SPI_IO
44 SPI_CLK
-
NC
(Not Connected)
-
• This pin is to be used if you have purchased the option with TCP/IP stack
(available upon request), else this pin has no function, so it has to be left open.
Table 7: Description of the 50-pin connector (interface A)
5.3 Determining the External Equipment Type
Before you connect the provided serial interface on the I56/I56i board-to-board
connectors to external host application, you need to determine if its external
hardware serial ports are configured as DTE or DCE.
The terms DTE (Data Terminal Equipment) and DCE (Data Communications
Equipment) are typically used to describe serial ports on devices. Computers
(PCs) generally use DTE connectors and communication devices such as
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
modems and DSU/CSU devices generally use DCE connectors. As a general
rule, DTE ports connect to DCE ports via straight through pinned cables. In
other words, a DTE port never connects directly to another DTE port. In a
similar manner, a DCE port never connects directly to another DCE port. The
signalling definitions were written from the perspective of the DTE device;
therefore, a Receive Data signal becomes an input to DTE but an output from
DCE.
The I56/I56i is designed for use as a DCE. Based on the aforementioned
conventions for DCE-DTE connections it communicates with the customer
application (DTE) using the following signals:
I56/I56i (DCE) to Application (DTE)
TX_0 ----------------------- TXD
RX_0 ----------------------- RXD
RTS_0 ----------------------- RTS
CTS_0 ----------------------- CTS
DTR_0 ----------------------- DTR
DSR_0 ----------------------- DSR
DCD_0 ----------------------- DCD
RING_0 ----------------------- RING
Table 8: Definitions between DTE and DCE ports.
5.4 Special functionality pins
5.4.1 Power supply
The power supply for the GSM/GPRS engine of the I56/I56i module has to be
a single voltage source of VVC5+ = 4.5 … 5,5 V. It must be able to provide
sufficient current in a transmit burst which typically rises to 1.6 A.
All the key functions for supplying power to the device are handled by an
ASIC power supply. The ASIC0 provides the following features:
Stabilizes the supply voltages for the GSM base band using low drop
linear voltage regulators.
Controls the module’s power up and power down procedures.
A watchdog logic implemented in the base band processor periodically
sends signals to the ASIC, allowing it to maintain the supply voltage for
all digital I56/I56i components. Whenever the watchdog pulses fail to
arrive constantly, the module is turned off.
5.4.2 Power supply pins (3 and 4) on the board-to-board connector
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Page 27
Two VC5 pins of the board-to-board connector are dedicated to connect the
supply voltage, five GND pins are recommended for grounding.
I65/I56I HARDWARE DESCRIPTION VERSION 1.00
The values stated below are measured directly at the reference points on the
I56/I56i board.
The POWER and (CRG option) pins serve as control signals for charging a
Li-Ion battery.
Signal name I/O Parameter Description
VC5+ I 4.5 V...5,5 V, Ityp 1.6 A during
transmit burst. The minimum
operating voltage must not fall
below 4.5 V, not even in case of
voltage drop.
Positive operating
voltage.
GND - 0 V Ground
POWER I This line signals to the
processor that the
charger is connected.
Table 9: Pin description of 50-pin board-to-board connector
5.4.3 Power up/down scenarios
In general, be sure not to turn on GSM/GPRS part of the I56/I56i module while
it is out of the operating range of voltage and temperature stated in chapters 5.2
and 3.3. The GSM/GPRS part of the I56/I56i would immediately switch off
after having started and detected these inappropriate conditions.
5.4.3.1 Turn on the GSM/GPRS part of I56/I56i
The GSM/GPRS part of the I56/I56i can be activated in a variety of ways,
which are described in the following chapters:
via SOFT_ON line: starts normal operating state (see chapter 5.4.3.2)
via POWER line: starts charging algorithm (see chapter 5.4.3.3)
5.4.3.2 Turn on the I56/I56i module using the SOFT_ON line
To switch on the I56/I56i module the SOFT_ON signal needs to be set to
HIGH level for at least 100 ms. On open collector is also internally
integrated on this line, which manage the turn on procedure.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Figure 4: Power-on by ignition signal
If the module is configured to a fix baud rate, the GSM/GPRS engine of the
I56/I56i will send the result code ^SYSSTART to indicate that it is ready to
operate. This result code does not appear when autobauding is active.
Ensure that VVC5 does not fall below 4,7 V while the SOFT_ON line is driven.
Otherwise the module cannot be activated.
To switch on the I56/I56i module the SOFT_ON signal needs to be
set to HIGH level for at least 100 ms.
For switching the module off refer to the next section 5.4.3.4.
It is not recommended to switch the module on and off by means of the
power supply (e.g. by tying the SOFT_ON constantly to HIGH). The
module will so have no possibility to log-off correctly from the network and
this will cause problems at the next attempt to register.
5.4.3.3 Turn on the GSM/GPRS engine of I56/I56i using the POWER signal
As detailed in chapter 5.6.5, the charging adapter can be connected
regardless of the module’s operating mode (except for Alarm mode).
If the charger is connected to the charger input of the external charging
circuit and the module’s POWER pin while I56/I56i is off, processor
controlled fast charging starts (see chapter 5.6.4). The I56/I56i enters a
restricted mode, referred to as Charge-only mode where only the charging
algorithm will be launched. During the Charge-only mode I56/I56i is neither
logged on to the GSM network nor are the serial interfaces fully accessible.
To switch to normal operation and log on to the GSM network, the
SOFT_ON line needs to be activated.
5.4.3.4 Turn off the GSM/GPRS engine of I56/I56i module
To switch the module off the following procedures may be used:
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Normal shutdown procedure: Software controlled by sending the
AT^SMSO command over the serial application interface. See chapter
5.4.3.5.
Emergency shutdown: Hardware driven by switching the RESET line
(Pin 26) of the board-to-board connector to ground = immediate
shutdown of supply voltages.
Automatic shutdown: See chapter 5.4.4
a) Takes effect if under voltage is detected.
b) Takes effect if I56/I56i board temperature exceeds critical limit.
5.4.3.5 Turn off GSM/GPRS engine of the I56/I56i module using AT command
The best and safest approach to powering down the I56/I56i GSM/GPRS
engine is to issue the AT^SMSO command. This procedure lets GSM engine
log off from the network and allows the software to enter into a secure state
and safe data before disconnecting the power supply. The mode is referred to
as POWER DOWN mode. In this mode, only the RTC stays active.
Before switching off the device sends the following response:
^SMSO: MS OFF
OK
^SHUTDOWN
After sending AT^SMSO do not enter any other AT commands. There are two
ways to verify when the module turns off:
Wait for the URC “SHUTDOWN”. It indicates that data have been
stored non-volatile and the module turns off in less than 1 second.
Be sure not to disconnect the operating voltage VVC5+ before the URC
“SHUTDOWN” has been issued. Otherwise you run the risk of losing data.
While the GSM engine is in POWER DOWN mode the application interface is
switched off and must not be fed from any other source. Therefore, your
application must be designed to avoid any current flow into any digital pins of
the application interface.
Note: In POWER DOWN mode, the output pins of the ASC0 interface RX_0,
CTS_0, DCD_0, DSR_0, RING_0 are switched to high impedance
state.
If this causes the associated input pins of your application to float, you
are advised to integrate an additional resistor (100 k, 1 M) at each
line. In the case of the serial interface pins you can either connect pull-
up resistors to an external power source (Vmin< 2.2 and Vmax = 3.3 V,
Imax= 10 mA), or pull down resistors to GND.
5.4.3.6 Maximum number of turn-on/turn-off cycles
Each time the module is shut down, data will be written from volatile memory
to flash memory. The guaranteed maximum number of write cycles is limited
to 100.000.
5.4.3.7 Emergency shutdown using RESET line
!!!Caution: Use the RESET pin only when, due to serious problems, the
software is not responding for more than 5 seconds. Pulling the
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
RESET pin causes the loss of all information stored in the volatile
memory since power is cut off immediately. Therefore, this
procedure is intended only for use in case of emergency, e.g. if
I56/I56i fails to shut down properly.
This signal is used to force a reset procedure by providing low level (driven to
ground) during at least 3.2 s. This signal has to be considered as an emergency
reset only. A reset procedure is already driven by an internal hardware during
the power-up sequence.
If no external reset is necessary, this input can be left open. If used (emergency
reset), the RESET signal is available on the board-to-board connectors.
5.4.3.7.1 How does it work?
a) Voltage VVC5+ is permanently applied to the module.
b) The module is active while the internal reset signal is kept at high level.
During operation of I56/I56i the base band controller generates watchdog
pulses at regular intervals. Once the RESET pin is grounded these
watchdog pulses are cut off from the power supply ASIC. The power
supply ASIC shuts down the internal supply voltages of I56/I56i after
max. 3.2 s and the module turns off.
Figure 5: Deactivating GSM engine by RESET signal
5.4.4 Automatic shutdown
Automatic shutdown takes effect if
the I56/I56i board is exceeding the critical limits of over temperature or
under temperature.
the battery is exceeding the critical limits of over temperature or under
temperature.
under voltage is detected.
The automatic shutdown procedure is equivalent to the power-down initiated
with the AT^SMSO command, i.e. I56/I56i logs off from the network and the
software enters a secure state avoiding loss of data.
NOTE: This does not apply if over voltage conditions or unrecoverable
hardware or software errors occur (see below for details).
Alert messages transmitted before the device switches off are implemented as
Unsolicited Result Codes (URCs). The presentation of these URCs can be
enabled or disabled with the two AT commands AT^SBC and AT^SCTM. The
URC presentation mode varies with the condition, please see chapters 5.4.4.1
to 5.4.4.3 for details. For further instructions on AT commands refer to [4].
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
5.4.4.1 Temperature dependent shutdown
The board temperature is constantly monitored by an internal NTC resistor
located on the PCB. The NTC that detects the battery temperature must be part
of the battery pack circuit as described in chapter 5.6. The values detected by
either NTC resistor are measured directly on the board or the battery and
therefore, are not fully identical with the ambient temperature.
Each time the board or battery temperature goes out of range or back to
normal, I56/I56i instantly displays an alert (if enabled).
URCs indicating the level "1" or "-1" allow the user to take appropriate
precautions, such as protecting the module from exposure to extreme
conditions. The presentation of the URCs depends on the settings
selected with the AT^SCTM write command:
AT^SCTM=1: Presentation of URCs is always enabled.
AT^SCTM=0 (default): Presentation of URCs is enabled for 15 seconds
time after start-up of I56/I56i. After 15 seconds
operation, the presentation will be disabled, i.e.
no alert messages can be generated.
URCs indicating the level "2" or "-2" are instantly followed by an orderly
shutdown. The presentation of these URCs is always enabled, i.e. they
will be output even though the factory setting AT^SCTM=0 was never
changed.
The maximum temperature ratings are stated in chapter 3.3. Refer to tables 10
and 11 below for the associated URCs. All statements are based on test
conditions according to IEC 60068-2-2 (still air).
Sending temperature alert (15 s after start-up, otherwise only if URC
presentation enabled).
^SCTM_A: 1 Caution: Tamb of battery close to over temperature limit.
^SCTM_B: 1 Caution: Tamb of board close to over temperature limit.
^SCTM_A: -1 Caution: Tamb of battery close to under temperature limit.
^SCTM_B: -1 Caution: Tamb of board close to under temperature limit.
^SCTM_A: 0 Battery back to uncritical temperature range.
^SCTM_B: 0 Board back to uncritical temperature range.
Table 10: Temperature dependent behaviour
Automatic shutdown (URC appears no matter whether or not presentation was
enabled).
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Page 32
^SCTM_A: 2 Alert: Tamb of battery equal or beyond over temperature limit.
I56/I56i switches off.
^SCTM_B: 2 Alert: Tamb of board equal or beyond over temperature limit.
I56/I56i switches off.
^SCTM_A: -2 Alert: Tamb of battery equal or below under temperature limit.
I56/I56i s itches off
I65/I56I HARDWARE DESCRIPTION VERSION 1.00
I56/I56i switches off.
^SCTM_B: -2 Alert: Tamb of board equal or below under temperature limit.
I56/I56i switches off.
Table 11: Automatic shutdown
5.4.4.2 Temperature control during emergency call
If the temperature limit is exceeded while an emergency call is in progress the
engine continues to measure the temperature, but deactivates the shutdown
functionality. If the temperature is still out of range when the call ends, the
module switches off immediately (without another alert message).
5.4.4.3 Under voltage shutdown if battery NTC is present
In applications where the charging technique of module is used and an NTC is
connected to the BAT_TEMP terminal, the software constantly monitors the
applied voltage. If the measured battery voltage is no more sufficient to set up
a call the following URC will be presented:
^SBC: Under voltage.
The message will be reported, for example, when you attempt to make a call
while the voltage is close to the critical limit and further power loss is caused
during the transmit burst. To remind you that the battery needs to be charged
soon, the URC appears several times before the module switches off. To enable
or disable the URC use the AT^SBC command. The URC will be enabled
when you enter the write command and specify the power consumption of your
GSM application. Step by step instructions are provided in [4].
5.4.4.4 Under voltage shutdown if no battery NTC is present
The under voltage protection is also effective in applications, where no NTC
connects to BAT_TEMP terminal. Thus, you can take advantage of this feature
even though the application handles the charging process or I56/ I56i is fed by
a fixed supply voltage. All you need to do is executing the write command
AT^SBC=<current> which automatically enables the presentation of URCs.
You do not need to specify <current>.
Whenever the supply voltage falls below the specified value (see Table 4) the
URC
^SBC: Under voltage
appears several times before the module switches off.
5.4.4.5 Over voltage shutdown
For over voltage conditions, no software controlled shutdown is implemented.
If the supply voltage exceeds the maximum value specified in Table 4, loss of
data and even unrecoverable hardware damage can occur.
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5.5 Automatic GPRS Multislot Class change
Temperature control is also effective for operation in GPRS Multislot class 10.
If the board temperature increases to the limit specified for restricted operation
(see 3.3 for temperature limits known as restricted operating) while data are
transmitted over GPRS, the module automatically reverts from GPRS Multislot
class 10 (3 RX x 2 TX) to class 8 (4 RX x 1 TX). This reduces the power
consumption and, consequently, causes the temperature of board to decrease.
Once the temperature drops to a value of 5 degrees below the limit of restricted
operation, I56/I56i returns to the higher Multislot class. If the temperature stays
at the critical level or even continues to rise, I56/I56i will not switch back to
the higher class. After a transition from Multislot class 10 to Multislot class 8 a
possible switchback to Multislot class 10 is blocked for one minute. Please
note that there is not one single cause of switching over to a lower GPRS
Multislot class. Rather it is the result of an interaction of several factors, such
as the board temperature that depends largely on the ambient temperature, the
operating mode and the transmit power. Furthermore, take into account that
there is a delay until the network proceeds to a lower or, accordingly, higher
Multislot class. The delay time is network dependent. In extreme cases, if it
takes too much time for the network and the temperature cannot drop due to
this delay, the module may even switch off as described in chapter 5.4.4.1. For
GPRS connection see related document [5].
5.6 GSM charging control
The GSM/GPRS part of the I56/I56i module integrates a charging management
for Li-Ion batteries. You can skip this chapter if charging is not your concern,
or if you are not using the implemented charging algorithm.
To benefit from the implemented charging management you are required to
build a charging circuit within your application. In this case, I56/I56i needs to
be powered from a Li-Ion battery pack, e.g. as specified in chapter 5.6.3.
The module only delivers, via its POWER line, the control signal needed to
start and stop the charging process. The charging circuit should include a
transistor and should be designed as illustrated in figure 6. A list of parts
recommended for the external circuit is given in table 12 below.
Figure 6: Schematic of charging/discharging process.
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5.6.1 Power-Set-Input
This input pin has to be used if a rechargeable Li-Ion battery is connected to
the module. The circuit diagram how to connect a Li-Ion battery to the
module is shown in chapter 5.6. If the PWR-SET pin is kept open (low
level), the internal regulator is active which drops internally the input
voltage down to 3.7 V DC and supplies the GSM/GPRS core with 3.7 V DC
(see figure below, the PWR-SET pin is low “L” and the regulator is active).
As above, usage of the PWR-SET pin is mandatory, if a rechargeable
battery is connected to the VC5 pin, BAT_TEMP and to the one of provided
Grounds. In this case the PWR-SET pin has to be set to the high level e.g.
connect it to the VC5 and POWER pins (see figures 11 and below, the
PWR-SET pin is set to high “H”). The input voltage on the POWER pin is
monitored internally from the GSM/GPRS core and provided on the VC5
pin for charging/discharging of connected battery. Set the PWR-SET pin of
High level enables the VC5 pin to alert its state from input to the
input/output which is required for battery applications. In order to make a
proper charging procedure, note that the POWER pin has to be supplied
with 5.5 to 8 V DC, and limited current to 800 mA from external power
source.
Figure 7: power set input
5.6.2 Battery pack characteristics
The charging algorithm has been optimized for a Li-Ion battery pack that meets
the characteristics listed below. It is recommended that the battery pack you
want to integrate into your I56/I56i application is compliant with these
specifications. This ensures reliable operation, proper charging and,
particularly, allows you to monitor the battery capacity using the AT^SBC
command (see [4] for details). Failure to comply with these specifications
might cause AT^SBC to deliver incorrect battery capacity values. A battery
pack especially designed to operate with I56/I56i module is specified in
chapter 5.6.3.
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Li-Ion battery pack specified for a maximum charging voltage of 4.2 V
and a capacity of 800 mAh. Battery packs with a capacity down to 600
mAh or more than 800 mAh are allowed, too.
Since charging and discharging largely depend on the battery
temperature, the battery pack should include a NTC resistor. If the NTC
is not inside the battery it must be in thermal contact with the battery.
The NTC resistor must be connected between BAT_TEMP and GND.
Required NTC characteristics are: 10 kΩ + 5 % @ 25 °C, B25/85 =
3435 K + 3 % (alternatively acceptable: 10 kΩ + 2 % @ 25 °C, B25/50 =
3370 K + 3 %).
Please note that the NTC is indispensable for proper charging, i.e. the
charging process will not start if no NTC is present.
Ensure that the pack incorporates a protection circuit capable of detecting
over voltage (protection against overcharging), under voltage (protection
against deep discharging) and over current. The circuit must be
insensitive to pulsed current.
On the I56/I56i module, a built-in measuring circuit constantly monitors
the supply voltage. In the event of under voltage, it causes I56/I56i to
power down. Under voltage thresholds are specific to the battery pack
and must be evaluated for the intended model. When you evaluate under
voltage thresholds, consider both the current consumption of I56/I56i and
of the application circuit.
The internal resistance of the battery and the protection should be as low
as possible. It is recommended not to exceed 150 m, even in extreme
conditions at low temperature. The battery cell must be insensitive to
rupture, fire and gassing under extreme conditions of temperature and
charging (voltage, current).
The battery pack must be protected from reverse pole connection. For
example, the casing should be designed to prevent the user from
mounting the battery in reverse orientation.
The battery pack must be approved to satisfy the requirements of CE
conformity.
Figure 8 below shows the circuit diagram of a typical battery pack design that
includes the protection elements described above.
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Figure 8: Battery pack circuit diagram
5.6.3 Recommended battery pack specification
Nominal voltage 3.6 V
Capacity 800 mAh
NTC 10 k ± 5 % @ 25 °C, B (25/85) = 3435K
± 3 %
Overcharge detection voltage 4.325 ± 0.025 V
Overcharge release voltage 4.075 ± 0.025 V
Over discharge detection voltage 2.5 ± 0.05 V
Over discharge release voltage 2.9 ± 0.5 V
Over correct detection 3 ± 0.5 A
Nominal working current <5 µA
Current of low voltage detection 0.5 µA
Over current detection delay time 8 ~ 16 ms
Short detection delay time 50 µs
Over discharge detection delay time 31 ~ 125 ms
Overcharge detection delay time 1 s
Internal resistance <130 m
Table 12: Battery pack specifications
5.6.4 Implemented charging technique
If the external charging circuit follows the recommendation of Figure 6, the
charging process consists of trickle charging and processor controlled fast
charging. For this solution, the fast charging current provided by the charger or
any other external source must be limited to 500 mA.
5.6.4.1 Trickle charging
Trickle charging starts when the charger is connected to the charger input
of the external charging circuit and the module’s POWER pin. The
charging current depends on the voltage difference between the charger
input of the external charging circuit and VC5+ of the module.
Trickle charging stops when the battery voltage reaches 3.6 V.
5.6.4.2 Fast charging
After trickle charging has raised the battery voltage to 3.2 V within 60
minutes ±10 % from connecting the charger, the power ASIC turns on
and wakes up the base band processor. Now, processor controlled fast
charging begins. If the battery voltage was already above 3.2 V,
processor controlled fast charging starts just after the charger was
connected to the charger input of the external charging circuit and the
POWER pin of module. If the GSM/GPRS part of the I56/I56i was in
POWER DOWN mode, it turns on and enters the Charge-only mode
along with fast charging (see also chapter 5.4.3.3).
Fast charging delivers a constant current until the battery voltage reaches
4.2 V and then it proceeds with varying charge pulses. As shown in
Figure 9, the pulse duty cycle is reduced to adjust the charging procedure
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and prevent the voltage from overshooting beyond 4.2 V. Once the pulse
width reaches the minimum of 100 ms and the duty cycle does not
change for 2 minutes, fast charging is completed.
Fast charging can only be accomplished in a temperature range from 0 °C
to +45 °C.
Figure 9: Charging process
Note: Do not connect the charger to the VC+ lines. Only the charger input
of the external charging circuit is intended as input for charging
current! The POWER pin of I56/I56i is the input only for indicating
a connected charger! The battery manufacturer must guarantee that
the battery complies with the described charging technique.
What to do if software controlled charging does not start up?
If trickle charging fails to raise the battery voltage to 3.2 V within 60 minutes
+10 %, processor controlled charging does not begin. To start fast charging you
can do one of the following:
Once the voltage has risen above its minimum of 3 V, you can try to start
software controlled charging by pulling the SOFT_ON line to HIGH.
If the voltage is still below 3 V, driving the SOFT_ON line to HIGH
switches the timer off. Without the timer running, the GSM/GPRS part of
the I56/I56i module will not proceed to software controlled charging. To
restart the timer you are required to shortly disconnect and reconnect the
charger.
5.6.5 Operating modes during charging
Of course, the battery can be charged regardless of the engine’s operating
mode. When the GSM engine is in Normal mode (SLEEP, IDLE, TALK,
GPRS IDLE or GPRS DATA mode), it remains operational while charging is
in progress (provided that sufficient voltage is applied). The charging process
during the Normal mode is referred to as Charge mode. If the charger is
connected to the charger input of the external charging circuit and the POWER
pin of module while GSM/GPRS part of I56/I56i is in POWER DOWN mode,
the GSM/GPRS part of the I56/I56i goes into Charge-only mode.
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5.6.5.1 Comparison Charge-only and Charge mode
5.6.5.1.1 Charge mode
In order to activate the charge mode, connect charger to charger input of
external charging circuit and the POWER pin of module while the GSM/GPRS
part of the I56/I56i is in the following modes:
operating, e.g. in IDLE or TALK mode
in SLEEP mode
The features while the charge mode is:
Battery can be charged while GSM engine remains operational and
registered to the GSM network.
In IDLE and TALK mode, the serial interfaces are accessible. AT
command set can be used to full extent.
In the NON-CYCLIC SLEEP mode, the serial interfaces are not
accessible at all. During the CYCLIC SLEEP mode they can be used as
described in chapter 5.9.3.
5.6.5.1.2 Charge-only mode
In order to activate the charge-only mode, connect charger to charger input of
external charging circuit and the POWER pin of module while the GSM/GPRS
part of the I56/I56i is:
in POWER DOWN mode
in Normal mode: Connect charger to the POWER pin, then enter
AT^SMSO.
IMPORTANT: While trickle charging is in progress, be sure that the
application is switched off. If the application is fed from the
trickle charge current the module might be prevented from
proceeding to software controlled charging since the current
would not be sufficient.
The features while the charge-only mode is:
Battery can be charged while GSM engine is deregistered from GSM
network.
Charging runs smoothly due to constant current consumption.
The AT interface is accessible and allows to use the commands listed
below.
Features of Charge-only mode
Once the GSM engine enters the Charge-only mode, the AT command
interface presents an Unsolicited Result Code (URC) which reads:
^SYSSTART CHARGE-ONLY MODE
Note that this URC will not appear when autobauding was activated (due to the
missing synchronization between DTE and DCE upon start-up). Therefore, it is
recommended to select a fixed baud rate before using the Charge-only mode.
While the Charge-only mode is in progress, you can only use the AT
commands listed in table 13 below. For further instructions refer to the AT
Command Set supplied with your GSM engine.
AT command Function
AT+CALA Set alarm time
AT+CCLK Set date and time of RTC
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AT^SBC Monitor charging process
Note: While charging is in progress, no battery capacity
value is available. To query the battery capacity
disconnects the charger. If the charger connects
externally to the host device no charging parameters
are transferred to the module. In this case, the
command cannot be used.
AT^SCTM Query temperature range, enable/disable URCs to report
critical temperature ranges.
AT^SMSO Power down GSM engine
Table 13: AT commands for charge-only
To proceed from Charge-only mode to normal operation, it is necessary to
drive the ignition line to ground. This must be implemented in your host
application as described in chapter 5.4.3.3. See also chapter 5.10 which
summarizes the various options of changing the mode of operation.
If your host application uses the GPIO1 pin to control a status LED as
described in chapter 5.8.2, please note that the LED is off while the GSM
engine is in Charge-only mode.
5.6.6 Charger requirements
If you are using the implemented charging technique and the charging circuit
recommended in Figure 66, the charger must be designed to meet the following
requirements:
a) Simple transformer power plug
Output voltage: 5.5 V...8 V (under load)
The charge current must be limited to 500 mA.
Voltage spikes that may occur while you connect or disconnect the
charger must be limited.
There must not be any capacitor on the secondary side of the power
plug (avoidance of current spikes at the beginning of charging).
b) Supplementary requirements for a) to ensure a regulated power supply
When current is switched off a voltage peak of 10 V is allowed for a
maximum 1 ms.
When current is switched on a spike of 1.6 A for 1 ms is allowed.
5.6.7 Features supported on the first and second serial interfaces of
GSM/GPRS engine
The GSM/GPRS engine of the I56/I56i module offers an unbalanced,
asynchronous serial interfaces conforming to ITU-T V.24 protocol DCE
signaling. The electrical characteristics do not comply with ITU-T V.28. The
significant levels are 0 V (for low data bit or ON condition) and 2.65 V (for
high data bit or OFF condition). See chapter 5.3 to determinate the DTE-DCE
connection.
ASC0:
↔ 8-wire serial interface
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↔ Includes the data lines TX_0 and RX_0, the status lines RTS_0 and
CTS_0 and, in addition, the modem control lines DTR_0, GSM_DSR0,
DCD_0 and RING_0.
↔ It is designed for voice calls, CSD calls, fax calls and GPRS services and
for controlling the GSM engine with AT commands. Full Multiplex
capability allows the interface to be partitioned into three virtual
channels, yet with CSD and fax services only available on the first
logical channel.
↔ The DTR_0 signal will only be polled once per second from the internal
firmware of I56/I56i.
↔ The RING_0 signal serves to indicate incoming calls and other types of
URCs (Unsolicited Result Code). It can also be used to send pulses to the
host application, for example to wake up the application from power
saving state (if required).
↔ Autobauding is selectable on this interface and supports the following bit
rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 230400
bps.
↔ ASC0 interface is intended for firmware upgrade of the GSM/GPRS
engine.
↔ This interface is configured for 8 data bits, no parity and 1 stop bit, and
can be operated at bit rates from 300 bps to 230400 bps.
↔ XON/XOFF software flow control can be used on this interfaces (except
if power saving is active).
5.6.8 SIM interface
The I56/I56i module includes two SIM interfaces which could not
concurrently be used:
• an integrated SIM card holder, part of I56/I56i module, for small SIM
cards (only 3 V).
• and an integrated 5-pin interface on board-to-board connector for user
application. This SIM circuit can be implemented outside the module
on the application platform. See section 5.6.8.1 “SIM Interface on
board-to-board connector”.
5.6.8.1 SIM Interface on board-to-board connector
The base band processor has an integrated SIM interface compatible with the
ISO 7816 IC card standard. This is wired to the host interface (board-to-board
connector) in order to be connected to an external SIM card holder. Six pins on
the board-to-board connector are reserved for the SIM interface. The
SIMPRES pin serves to detect whether a tray (with SIM card) is present in the
card holder. Using the SIMPRES pin is mandatory for compliance with the
GSM 11.11 recommendation if the mechanical design of the host application
allows the user to remove the SIM card during operation. See chapter 5.6.8.2
for details. It is recommended that the total cable length between the board-to-
board connector pins on I56/I56i and the pins of the SIM card holder does not
exceed 200 mm in order to meet the specifications of 3GPP TS 51.010-1 and to
satisfy the requirements of EMC compliance.
Signal Description
GND Ground connection for SIM card.
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SIMCLK Chip card clock, various clock rates can be set in the base
band processor.
SIMVCC SIM supply voltage from PSU-ASIC
SIMDATA Serial data line, input and output.
SIMRST Chip card reset, provided by base band processor.
SIMPRES Input on the base band processor for detecting a SIM card
tray in the holder. The SIMPRES pin is mandatory for
applications that allow the user to remove the SIM card
during operation. The SIMPRES pin is solely intended for
use with a SIM card. It must not be used for any other
purposes. Failure to comply with this requirement may
invalidate the type approval of I56/I56i.
Table 14: Signals of the SIM interface (board-to-board connector)
5.6.8.2 Requirements for using the SIMPRES pin
According to ISO/IEC 7816-3 the SIM interface must be immediately shut
down once the SIM card is removed during operation. Therefore, the signal at
the SIMPRES pin must go low before the SIM card contacts are mechanically
detached from the SIM interface contacts. This shut-down procedure is
particularly required to protect the SIM card as well as the SIM interface of
I56/I56i from damage. An appropriate SIM card detect switch is required on
the card holder. For example, this is true for the model supplied by Molex,
which has been tested to operate with I56/I56i and is part of the FALCOM
reference equipment submitted for type approval. Molex ordering number is
91228-0001.
The start-up procedure of module involves a SIM card initialization performed
within 1 second after getting started. An important issue is whether the
initialization procedure ends up with a high or low level of the SIMPRES
signal:
a) If, during start-up of I56/I56i, the SIMPRES signal on the SIM interface
is high, then the status of the SIM card holder can be recognized each
time the card is inserted or ejected. A low level of SIMPRES indicates
that no SIM card tray is inserted into the holder. In this case, the module
keeps searching, at regular intervals, for the SIM card. Once the SIM
card tray with a SIM card is inserted, SIMPRES is taken high again.
b) If, during start-up of I56/I56i, the SIMPRES signal is low, the module
will also attempt to initialize the SIM card. In this case, the initialization
will only be successful when the card is present. If the SIM card
initialization has been done, but the card is no more operational or
removed, then the module will never search again for a SIM card and
only emergency calls can be made. Removing and inserting the SIM card
during operation requires the software to be reinitialized. Therefore, after
reinserting the SIM card it is necessary to restart I56/I56i. It is strongly
recommended to connect the contacts of the SIM card detect switch to
the SIMPRES input and to the SIMVCC output of the module as
illustrated in the sample diagram in figure 6 below.
Note: No guarantee can be given, nor any liability accepted, if loss of data
is encountered after removing the SIM card during operation. Also, no
guarantee can be given for properly initializing any SIM card that the
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user inserts after having removed a SIM card during operation. In this
case, the application must restart I56/I56i.
5.6.8.3 Design considerations for SIM card holder
The schematic below is a sample configuration that illustrates the Molex SIM
card holder. X503 is the designation used for the SIM card holder.
Figure 14: SIM card holder
Pin Signal name I/O Function
1 SIMVCC I Supply voltage for SIM card, generated by the GSM
engine
2 SIMRST I Chip card reset, prompted by the GSM engine
3 SIMCLK I Chip card clock
4 GND - Ground line for the SIM card
5 CCVPP - Not connected
6 SIMDATA I/O Serial data line, bi-directional
7 CCDET1 - Connect to SIMVCC
8 CCDET2 - Connects to the SIMPRES input of the GSM engine.
Serves to recognize whether a SIM card is in the
holder.
Table 15: Pin assignment of Molex SIM card holder on DSB45 Support Box
Pins 1 through 8 (except for 5) are the minimum requirement according to the
GSM recommendations, where pins 7 and 8 are needed for SIM card tray
detection through the SIMPRES pin.
Figure 15: Pin numbers of Molex SIM card holder
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5.7 Audio interface
The I56/I56i comprises an audio interface available on the 40-pin board-to-
board connector:
An analogue audio interface, with a balanced analogue microphone input
and a balanced analogue earpiece output.
5.7.1 Microphone circuit
This interface with a microphone supply circuit and can be used to feed an
active microphone. It has an impedance of 50 k.
5.8 Control signals
5.8.1 Synchronization signal
The synchronization signal serves to indicate growing power consumption
during the transmit burst. The signal is generated by the GPIO1 pin. Please
note that this pin can adopt two different operating modes which you can select
by using the AT^SGPIO1 command (mode 0 and 1). For details refer to the
following chapter and to [4]. To generate the synchronization signal the pin
needs to be configured to mode 0 (= default). This setting is recommended if
you want your application to use the synchronization signal for better power
supply control. Your platform design must be such that the incoming signal
accommodates sufficient power supply to the I56/I56i module if required. This
can be achieved by lowering the current drawn from other components
installed in your application. The timing of the synchronization signal is shown
below. High level of the GPIO1 pin indicates increased power consumption
during transmission.
Figure 16: GPIO1 signal during transmit burst
*) The duration of the GPIO1 signal is always equal, no matter whether the traffic
or the access burst are active.
5.8.2 Using the GPIO1 pin to control a status LED
As an alternative to generating the synchronization signal, the GPIO1 pin can
be used to control a status LED on your application platform.
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To avail of this feature you need to set the GPIO1 pin to mode 1 by using the
AT^SGPIO1 command. For details see [4].
When controlled from the GPIO1 pin the LED can display the functions listed
in table 16 below.
LED mode Operating status
Off I56/I56i is off or run in SLEEP or Alarm mode
600 ms On/600 ms Off No SIM card inserted or no PIN entered, or network search
in progress, or ongoing user authentication, or network login in
progress.
75 ms On/3 s Off Logged to network (monitoring control channels and user
interactions). No call in progress.
75 ms on/75 ms Off/
75 ms On/3 s Off One or more GPRS contexts activated.
Flashing Indicates GPRS data transfer: When a GPRS transfer is in
progress, the LED goes on within 1 second after data packets
were exchanged. Flash duration is approximately 0.5 s.
On Depending on type of call:
Voice call: Connected to remote party.
Data call: Connected to remote party or exchange of parameters
while setting up or disconnecting a call.
Table 16: Coding of the status LED
_____________________________
LED Off = GPIO1 pin low.
LED On = GPIO1 pin high (if LED is connected as illustrated in figure 12)
To operate the LED a buffer, e.g. a transistor or gate, must be included in your
application. A sample configuration can be gathered from figure 17. Power
consumption in the LED mode is the same as for the synchronization signal
mode. For details see 7, GPIO1 pin.
Figure 17: LED Circuit (Example)
5.8.3 Behaviour of the RING_0 line (ASC0 interface)
The RING_0 line is available on the first serial interface (ASC0). The signal
serves to indicate incoming calls and other types of URCs (Unsolicited Result
Code). Although not mandatory for use in a host application, it is strongly
suggested that you connect the RING_0 line to an interrupt line of your
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application. In this case, the application can be designed to receive an interrupt
when a falling edge on RING_0 occurs. This solution is most effective,
particularly, for waking up an application from power saving. Note that if the
RI_ line is not wired, the application would be required to permanently poll the
data and status lines of the serial interface at the expense of a higher current
consumption. Therefore, utilizing the RING_0 line provides an option to
significantly reduce the overall current consumption of your application.
The behaviour of the RING_0 line varies with the type of event:
When a voice call comes in the RING_0 line goes low for 1 s and high
for another 4 s. Every 5 seconds the ring string is generated and sent over
the RX_0 line. If there is a call in progress and call waiting is activated
for a connected handset or handsfree device, the RING_0 line switches to
ground in order to generate acoustic signals that indicate the waiting call.
Figure 18: Incoming voice call
Likewise, when a fax or data call is received, RING_0 goes low.
However, in contrast to voice calls, the line remains low. Every 5
seconds the ring string is generated and sent over the RXD0 line.
Figure 19: Incoming data call
All types of Unsolicited Result Codes (URCs) also cause the RING_0
line to go low, however for 1 second only. For example, I56/I56i may be
configured to output a URC upon the receipt of an SMS. As a result, if
this URC type was activated with AT+CNMI=1,1, each incoming SMS
causes the RING_0 line to go low. See [4] for detailed information on
URCs.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Figure 20: URC transmission
Function Pin Status Description
0 SLEEP mode CFUN=0 or CYCLIC
SLEEP mode CFUN=5 or 6, the module
is caused to wake up to full functionality.
If CFUN=7 or 8, power saving is
resumed after URC transmission or end
of call.
Ring
indication
RING_0
1 No operation
Table 17: ASC0 ring signal
5.9 Power saving
SLEEP mode reduces the functionality of the GSM/GPRS engine of the
I56/I56i module to a minimum and, thus, minimizes the current consumption to
the lowest level. Settings can be made using the AT+CFUN command. For
details see below and [4]. SLEEP mode falls into two categories:
NON-CYCLIC SLEEP mode AT+CFUN=0
CYCLIC SLEEP modes, selectable with AT+CFUN=5,6,7,8 or 9.
IMPORTANT: Please keep in mind that power saving works properly only
when PIN authentication has been done. If you attempt to
activate power saving while the SIM card is not inserted or the
PIN not correctly entered, the selected <fun> level will be set,
though power saving does not take effect. For the same reason,
power saving cannot be used if the GSM/GPRS engine of the
I56/I56i operates in Alarm mode.
To check whether power saving is on, you can query the status of AT+CFUN if
you have chosen CYCLIC SLEEP mode. If available, you can take advantage
of the status LED controlled by the GPIO1 pin (see chapter 5.8.2). The LED
stops flashing once the module starts power saving. The wake-up procedures
are quite different depending on the selected SLEEP mode. Table 18 compares
the wake-up events that can occur in NON-CYCLIC and CYCLIC SLEEP
modes.
5.9.1 No power saving (AT+CFUN=1)
The functionality level <fun>=1 is where power saving is switched off. This is
the default after start-up.
5.9.2 NON-CYCLIC SLEEP mode (AT+CFUN=0)
If level 0 has been selected (AT+CFUN=0), the serial interface is blocked. The
module shortly deactivates power saving to listen to a paging message sent
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
from the base station and then immediately resumes power saving. Level 0 is
called NON-CYCLIC SLEEP mode, since the serial interface is not
alternatingly made accessible as in CYCLIC SLEEP mode.
The first wake-up event fully activates the module, enables the serial interface
and terminates the power saving mode. In short, it takes the GSM/GPRS
engine of the I56/I56i back to the highest level of functionality <fun>=1.
RTS_0 is not used for flow control, but to wake up the module.
5.9.3 CYCLIC SLEEP mode (AT+CFUN=5, 6, 7, 8)
The major benefit over the NON-CYCLIC SLEEP mode is that the serial
interface is not permanently blocked and that packet switched calls may go on
without terminating the selected CYCLIC SLEEP mode. This allows the
GSM/GPRS engine of the I56/I56i to become active, for example to perform a
GPRS data transfer, and to resume power saving after the GPRS data transfer is
completed.
The CYCLIC SLEEP modes give you greater flexibility regarding the wake-up
procedures:
For example, in all CYCLIC SLEEP modes, you can enter AT+CFUN=1 to
permanently wake up the module. In modes CFUN=7 and 8, the GSM/GPRS
engine of the I56/I56i automatically resumes power saving, after you have sent
or received a short message or made a call. CFUN=5 and 6 do not offer this
feature, and therefore, are only supported for compatibility with earlier
releases. Please refer to Table 18 for a summary of all modes.
The CYCLIC SLEEP mode is a dynamic process which alternatingly enables
and disables the serial interface. By setting/resetting the CTS signal, the
module indicates to the application whether or not the UART is active. The
timing of CTS is described below.
Both the application and the module must be configured to use hardware flow
control (RTS/CTS handshake). The default setting of the GSM/GPRS engine
of the I56/I56i is AT\Q0 (no flow control) which must be altered to AT\Q3.
See [4] for details.
5.9.4 CYCLIC SLEEP mode AT+CFUN=9
Mode AT+CFUN=9 is similar to AT+CFUN=7 or 8, but provides two
additional features:
RTS_0 is not intended for flow control (as in modes AT+CFUN=5,6,7
or 8), but can be used to temporarily wake up the module. This way, the
module can quickly wake up and resume power saving, regardless of the
CTS timing controlled by the paging cycle.
The time the module stays active after RTS was asserted or after the last
character was sent or received, can be configured individually using the
command AT^SCFG. Default setting is 2 seconds like in AT+CFUN=7.
The entire range is from 0.5 seconds to 1 hour, selectable in tenths of
seconds. For details see [4].
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
5.9.5 Timing of the CTS signal in CYCLIC SLEEP modes
The CTS signal is enabled in synchrony with the paging cycle of module. It
goes active low each time when the module starts listening to a paging message
block from the base station. The timing of the paging cycle varies with the base
station. The duration of a paging interval can be calculated from the following
formula:
4.615 ms (TDMA frame duration) * 51 (number of frames) * DRX value.
DRX (Discontinuous Reception) is a value from 2 to 9, resulting in paging
intervals from 0.47 to 2.12 seconds. The DRX value of the base station is
assigned by the network operator. Each listening period causes the CTS signal
to go active low: If DRX is 2, the CTS signal is activated every 0.47 seconds, if
DRX is 3, the CTS signal is activated every 0.71 seconds and if DRX is 9, the
CTS signal is activated every 2.1 seconds. The CTS signal is active low for 4.6
ms. This is followed by another 4.6 ms UART activity. If the start bit of a
received character is detected within these 9.2 ms, CTS will be activated and
the proper reception of the character will be guaranteed.
CTS will also be activated if any character is to be sent.
After the last character was sent or received the interface will remain active
for:
another 2 seconds, if AT+CFUN=5 or 7,
another 10 minutes, if AT+CFUN=6 or 8,
or for an individual time defined with AT^SCFG, if AT+CFUN=9.
Assertion of RTS has the same effect.
In the pauses between listening to paging messages, while CTS is high, the
module resumes power saving and the AT interface is not accessible. See
figure 21 and figure 22.
Figure 21: Timing of CTS signal (example for a 2.12 s paging cycle)
Figure 22 illustrates the CFUN=5 and CFUN=7 modes, which reset the CTS
signal 2 seconds after the last character was sent or received.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Figure 22: Beginning of power saving if CFUN=5 or 7
5.9.6 Wake up I56/I56i from SLEEP mode
A wake-up event is any event that causes the module to draw current.
Depending on the selected mode the wake-up event either switches SLEEP
mode off and takes I56/I56i back to AT+CFUN=1, or activates I56/I56i
temporarily without leaving the current SLEEP mode.
Definitions of the state transitions described in table 18 below:
Quit = I56/I56i exits SLEEP mode and returns to AT+CFUN=1.
Temporary = I56/I56i becomes active temporarily for the duration of the
event and the mode-specific follow-up time after the last
character was sent or received on the serial interface.
No effect = Event is not relevant in the selected SLEEP mode. I56/I56i
does not wake up.
Event Selected
mode
AT+CFUN=0
Selected mode
AT+CFUN=5 or
6
Selected mode
AT+CFUN=7,8,9
Ignition line No effect No effect No effect
RTS0 1) (falling edge) Quit No effect (RTS is
only used for flow
control)
Mode 7 and 8: No
effect (RTS is only
used for flow control)
Mode 9: Temporary
Unsolicited Result Code
(URC)
Quit Quit Temporary
Incoming voice or data
call
Quit Quit Temporary
Any AT command (incl.
outgoing voice or data
call, outgoing SMS)
Not possible
(UART
disabled)
Temporary Temporary
Incoming SMS
depending on mode
selected by AT+CNMI:
AT+CNMI=0,0 (=
default, no indication of
received SMS)
AT+CNMI=1,1 (=
displays URC upon
receipt of SMS)
No effect
Quit
No effect
Quit
No effect
Temporary
GPRS data transfer Not possible
(
UART
Temporary Temporary
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
disabled)
RTC alarm2) Quit Quit Temporary
AT+CFUN=1 Not possible
(UART
disabled)
Quit Quit
Table 18: Wake-up events in NON-CYCLIC and CYCLIC SLEEP modes
1) During the CYCLIC SLEEP modes 5, 6, 7, and 8, RTS0 is conventionally
used for flow control: The assertion of RTS_0 signal that the application is
ready to receive data - without waking up the module. If the module is in
CFUN=0 mode the assertion of RTS0 serves as a wake-up event, giving the
application the possibility to intentionally terminate power saving. If the
module is in CFUN=9 mode, the assertion of RTS_0 can be used to
temporarily wake up I56/I56i for the time specified with the AT^SCFG
command (default = 2 s).
2) Recommendation: In NON-CYCLIC SLEEP mode, you can set an RTC
alarm to wake up I56/I56i and return to full functionality. This is a useful
approach because, in this mode, the AT interface is not accessible.
5.10 Summary of state transitions (except SLEEP mode)
5.10.1 Summary of POWER DONE and Normal Mode
Further mode
Present mode
POWER DOWN Normal mode*)
POWER
DOWN mode
-- SOFT_ON >100 ms at low level
Normal
mode*)
AT^SMSO or exceptionally RESET
pin >3.2 s at low level
--
Alarm mode Alarm mode AT^SMSO or
exceptionally RESET pin >3.2 s at low
level
SOFT_ON >100 ms at low level
Table 19: Summary of state transitions
_______________________________________________________________
*) Normal mode covers TALK, DATA, GPRS, IDLE and SLEEP modes
5.10.2 Summary of Alarm Mode
Further mode
Present mode
Alarm mode
POWER DOWN mode Wake-up from POWER DOWN mode (if activated
with AT+CALA)
Normal mode*) AT+CALA followed by AT^SMSO. I56/I56i enters
Alarm mode when specified time is reached
Alarm mode --
Table 20: Summary of state transitions
_______________________________________________________________
*) Normal mode covers TALK, DATA, GPRS, IDLE and SLEEP modes
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
5.10.3 Resetting the GSM module by AT+CFUN=1,1
This command can only be used if the serial interface is enabled.
If the GSM software is still running, while the user feels the need to reset
the module, AT+CFUN=1,1 can be used. The module will properly be
logged-off from the registered network, resets and restarts the module to full
functionality. After reset and restart, PIN authentication is necessary
(AT+CPIN). If autobauding is enabled, it is recommended to wait 3 to 5
seconds before entering the first AT command.
The control status LED on SING pin (see section 5.8.2) shortly toggle to
OFF and back to ON again to show the progress.
Keep in mind that, the reset command described above, does not change the
level of I56/I56i functionality but only restarts the I56/I56i module.
5.11 GSM 07.05 and 07.07 commands
The GSM modem of the I56/I56i is controlled by an advanced set of AT
commands. For further information it is recommended to read the ETSI
GSM recommendation. See also related documents [4].
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
6 EMC and ESD requirements
The ETS 300342-1 standard applies to the I56/I56i with regard to EMC and
ESD requirements.
Additional requirements in relation to EMC/ESD:
If the I56/I56i is being used in cars, the requirements regarding power
supply as defined in section 9.6 of the ETS 300342-1 (6/97) standard must
be fulfilled.
The connecting cable between the chip card reader and the socket on the
I56/I56i must be shielded in compliance with EMC requirements.
When using the I56/I56i cellular engine with individual handsfree
equipment, noise interference may occur.
The I56/I56i cellular engine must be connected directly to the ground of the
base device.
Note:
The device should only be handled in compliance with ESD
regulations (grounded, ESD chain, trained personnel).
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
7 RF Exposures
This device contains 850/1800/1900 MHz GSM/GPRS functions that are
operational on these frequencies.
The external antennas used for this mobile transmitter must provide a
separation distance of at least 20 cm from all persons and must not be
co-located or operating in conjunction with any other antenna or
transmitter.
The following statements according to the FCCs are only applied for the
I56i module. However, the I56i module contains 1800 MHz GSM functions
that is not operational (must not be used) in U.S. Territories. This filing is
only applicable for 850MHz GSM/1900 MHz PCS operations, whereby
only these frequencies (850MHz GSM/1900 MHz PCS) are possible to be
used in U.S. Territories.
Statement according to FCC part 15.19:
This device complies with Part 15 of the FCC Rules. Operation is subject
to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received, including
interference that may cause undesired operation.
Statement according to FCC part 15.21:
Modifications not expressly approved by this company could void the
user's authority to operate the equipment.
Statement according to FCC part 15.105:
NOTE: This equipment has been tested and found to comply with the
limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications.
However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the
equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
8 First steps to make it works
The quickest way to get first results with the I56/I56i embedded
GSM/GPRS module is to operate with the GSM-EVAL-KIT which is
available by FALCOM upon request. It saves design, time and reduces
“Time-to-Market” period. For more details about the FALCOM GSM-
EVAL-KIT, refer to the chapter “GSM Evaluation Kit (GSM EVAL-KIT)”.
NOTE: The GSM/GPRS module I56/I56i are compatible to the I2D
module as far as the pin-out on the 50-pin board-to-board
connector is concerned. By evaluating the I56/I56i, an I2D
adapter board is required to perform the connection between the
I56/I56i and GSM-EVAL-KIT. This applies for the users who
already have an adapter and a GSM-EVAL-KIT. For other users
they have to purchase one.
8.1 Minimum set-up connection
This section and subsections below describes the minimum hardware
connection of I56/I56i module to get started if the users do not use the
GSM-EVAL-KIT.
As a minimum, to set-up a connection between your PC and the I56/I56i, it
is necessary to connect the following interfaces to operate the I56/I56i
properly. Please follow step-by-step the instructions below. The figure
below shows in a visual form the connection of the I56/I56i hardware
interfaces.
8.1.1 Mounting the I56/I56i
The I56/I56i contains two holes for mounting screws. The module can also
be assembled to various applications without using the screws.
8.1.2 Antenna interface
The antenna must be located on the places where the signal strength is
sufficient. Maybe a mobile phone is required to be used to verify the best
location for the I56/I56i connected antenna.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Electronic devices can cause interference, which affects the performance of
the I56/I56i. Do not locate the antenna nearby electric devices or other
antennas.
The I56/I56i uses a MMCX antenna connector. The GSM RF connector has
impedance 50 Ω. A dual- or tri band GSM antenna can be directly
connected to this connector. Mating plugs and cables can also be chosen
from the FALCOM GmbH. In addition to the GSM antenna, FALCOM
GmbH provides antenna cable sets which connects a MMCX connector to
the FME connector (if you are using a GSM antenna with FME connector,
only) through 20 cm RG.174 antenna cable. The ordering number of this
antenna adapter is KA07. See chapter 10.2 for more details.
8.1.3 SIM interface
The integrated SIM interface in the I56/I56i module controls a 3 V SIM
card. This interface is fully compliant with GSM 11.11 recommendations
concerning SIM functions.
The I56/I56i requires a small SIM card, which is provided by your mobile
phone service provider. This contains the telephone number of I56/I56i you
will use, as well as other customer information.
If your SIM is larger credit-card size, it may have a snap-out area that
allows the small SIM to be removed by gentle twisting. Otherwise apply to
your service provider for a small SIM.
The SIM card must be enabled for all services that you want to use –
VOICE, DATA, and/or FAX; if in doubt contact your service provider.
Via pushing the eject button on the right side of the card holder, the card
holder can be taken off. Put the SIM card into the card holder. The bevelled
corner of SIM card has to be on the same side to bevelled corner of card
holder and the golden contact area is facing upwards. Make sure that the
SIM card is sitting firmly in the SIM card holder slot. Then insert the tray
(with SIM card) into the card reader, and push it forwards till it snaps in.
8.1.4 Serial communication signals
The physical interface to the integrated I56/I56i is performed through available
lines on the 40-pin board-to-board connector. The I56/I56i supports an
unbalanced, asynchronous serial channel conforming to ITU-T V.24 protocol
DCE signaling. The electrical characteristics do not comply with ITU-T V.28.
The significant levels are 0 V (for low data bit or ON condition) and 2.65 V
(for high data bit or OFF condition). This interface is provided with 8-wire
support lines and ground. In order to use different voltage levels, a appropriate
level shifters has to be connected. See also subsection “Level Shifter” follow.
E.g. in order to provide RS232 compatible levels use the 3 V compatible
MAX3232 transceiver from Maxim (see figure 23) or others based on the
required levels. If a RS232 compatible serial level is obtained, then you can
directly communicate with a host device serial port. All supported variable
baud rates can be controlled from the appropriate screens in the application
software (e.g. HyperTerminal).
Refer also on the section 5.3 to determinate the DTE-DCE connection.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
8.1.4.1 Level Shifter
Figure 23* : level shifter application diagram for serial link
* This application note is valid for VCC ≥ 3.0 Volt (see MAX3238
specifications). Auto shut down mode is not used in this example.
8.1.5 Power supply
Two VC5 pins of the board-to-board connector are provided to connect the
supply voltage, five GND pins are recommended for grounding.
The power supply for the I56/I56i module has to be a single voltage source of
VVC5+= 4,75 … 5,25 V. It must be able to provide sufficient current in a
transmit burst which typically rises to 1.6 A.
Before you connect the module to the external supply voltage, please, start the
application software (HyperTerminal) which is to be found in the following
directory:
Go to Start > Program > Accessories > Communication and click the
HyperTerminal program.
On the appeared screen assign the name for the current connection (e.g.
“I56_I56i”) and click OK.
Then choose the correct COM Port on which the module is connected
as well select the baud rate of (57000 bps, 8 bit, no parity bit, 1 stop bit)
and click OK.
Now, connect GND pins to the ground, and VC5 lines of the module to the
external source (+5 V DC) properly.
Once the module is connected to the supply voltage, a string “STARTING” is
responded from the module and it is also displayed on the terminal screen. That
signifies the module is operational, and it is waiting for switching on. The
serial interface of the module is inaccessible yet.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
8.1.6 Turn on the GSM/GPRS engine of I56/I56i
In general, be sure not to turn on GSM/GPRS engine of the I56/I56i module
while it is out of the operating range of voltage and temperature stated
described in Table 4. The GSM/GPRS engine of the I56/I56i would
immediately switch off after having started and detected these inappropriate
conditions.
To switch on the I56/I56i GSM/GPRS engine the SOFT_ON signal needs to
be driven to HIGH level for at least 100 ms. To make it in a properly
manner just use externally a user application switch (see also figure attached
in chapter 8.1). Now the module is ready for operation and the serial
interface of the module is accessible. Just type AT and then “ENTER” key
the module responds OK.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
9 Housing
60,1±0,1
40,0±0,1
9,4±0,1
5,0
0.5
14,7
3,3
54,0
25,4
17,6
34,0
4,5
47,1
33,5
3,0 3,0
3,0
3,0
1,8
7,7
3,0
20,0
1,8
1,8
3,3
1,8
Figure 24: Housing of I56/I56i
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
10 Connector Supplier and Peripheral devices
10.1 50-pin connector
The 50-pin connector used in the integrated module is a Samtec SMT
connector.
Part number of 50-pin connector : FTS-125-01-F-DV-P-TR.
Counterpart number of connector : CLP-125-02-G-D-PA.
For more information about this connector : http://www.samtec.com/
10.2 GSM Antenna
The integrated modem antenna connector is a MMCX connector. The
MMCX connector incorporates a 'Snap On' latching action in order to make
the connection easier with an excellent RF performance. An additional
advantage is its small physical size which is 50% of the standard MCX
connector. This type of connector is suitable for the standard ranges of
flexible and semi-rigid cables. The characteristic impedance of the MMCX
coaxial connector is 50 ohm. The antenna manufacturer must guarantee that
the antenna will be working according to the following radio characteristics:
EGSM 850 GSM 1800 GSM 1900
Frequency RX 869 to 894 MHz 1805 to 1880 MHz 1850 to 1910 MHz
Frequency TX 824 to 849 MHz 1710 to 1785 MHZ 1930 – 1990 MHz
RF power stand 2 W at 12.5 %
duty cycle
1 W at 12.5 % duty
cycle
1 W at 12.5 % duty
cycle
Impedance 50
VSWR < 2
Typical radiated
gain 0 dBi on azimuth plane
Table 21: radio characteristics
The I56/I56i requires a MMCX (Miniature Micro Connector) plug to
connect a GSM antenna. To connect a GSM antenna (e. g ANT010
850/1900 MHz) to the I56/I56i modem, the FALCOM offers a antenna
cable product called KA07 (MOQ-set of 10 pieces). Figure 25 shows the
KA07 antenna cable with MMCX and FME-female connectors.
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
Figure 25: MMCX connector example (right
angled)
Figure 26: View of the KA07 antenna cable (right
angled)
10.3 The SIM card holder
The SIM card holder used in the integrated module is a MOLEX connector.
Part number connector: 99228-0002
Part number holder : 91236-0002
For more information about this connector : http://www.molex.com/
It is possible to use an external SIM card holder through the 50-pin
connector (the length of the SIM line must not exceed 15 cm).
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I65/I56I HARDWARE DESCRIPTION VERSION 1.00
11 GSM Evaluation Kit (GSM EVAL-KIT)
The quickest way to get first results with the embedded GSM module is the
activation by the GSM-EVAL-KIT by means of a terminal program.
The FALCOM GSM-EVAL-KIT provides design engineers with all
necessary hard- and software information for the creation of embedded
applications based on FALCOM GSM/DCS embedded modules. It saves
design, time and reduces “Time-to-Market” period.
The GSM EVAL-KIT set contains:
EVAL-Board
Adapter PCB for A2D/F35/C2D/C55 (I56) modules called
FALCOM adapter
Adapter PCB for I56 module called CM adapter
Wall mount power adapter
9-pin serial cable (pin to pin direct, male to female)
GSM antenna (900/1800/1900) and cable (30 cm) with coaxial plug
Coaxial adapter MMCX-FME
Headset with RJ45 plug
Set of connectors:
- 2 pieces 40-pin stacking connector (plug and socket)
- 2 pieces coaxial antenna plug (plug and socket)
- 2 pieces 15-pin cable connector (plug and socket)
- 2 pieces external SIM card reader
- 3 pieces short circuit bridges
- 4 pieces mounting clamps
- 4 pieces dowel
CD
- “A2D-Testsoftware”
- Layout data (PROTEL/GERBER format) of module
- Evaluation board user manual
- AT command set
- I56 GPRS start up guide
- I56/I56i hardware manual
- I56i TCP/IP command set
Schematics of the evaluation platform and adapter PCB’s (power supply,
external SIM card, serial interface).
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