Fibocom G610 Instructions for use

G610 GPRS Module
Hardware User Manual
Version: V1.0.2
Date: 2011-03-31

G610 GPRS Module Hardware User Manual Page 2 of 47
Confidential Material
This document contains information highly confidential to Shenzhen G&T Industrial Development Co.,
Ltd (Fibocom). Fibocom offers this information as a service to its customers, to support application and
engineering efforts that use the products designed by Fibocom. The information provided is based upon
requirements specifically provided to Fibocom by the customers. All specifications supplied herein are
subject to change. Disclosure of this information to other parties is prohibited without the written consent
of G&T.
Copyright
Transmittal, reproduction, dissemination and/or editing of this document as well as utilization of its
contents and communication thereof to others without express authorization are prohibited. Offenders
will be held liable for payment of damages. All rights created by patent grant or registration of a utility
model or design patent are reserved.
Copyright ©1999-2010 Shenzhen G&T Industrial Development Co., Ltd. All rights reserved.
Revision History
Version Date Remarks
V1.0.2 2011-03-31 1. Update UART description
2. Fix HS_DET description
Trademarks Notice
The FIBOCOM Logo is registered by Shenzhen G&T Industrial Development Co., Ltd. All other product
or service names or Logos are the property of their respective owners.
Copyright ©1999-2010 Shenzhen G&T Industrial Development Co., Ltd. All rights reserved.

G610 GPRS Module Hardware User Manual Page 3 of 47
Contents
1Preface................................................................................................................................................6
1.1 Manual Scope ..........................................................................................................................6
1.2 TargetAudience .......................................................................................................................6
1.3 Applicable Documents .............................................................................................................6
1.4 Standards.................................................................................................................................6
1.5 RegulatoryApprovals...............................................................................................................7
1.6 FCC Notice to Users................................................................................................................7
2Introduction..........................................................................................................................................8
2.1 Product concept.......................................................................................................................8
2.2 Product Specifications..............................................................................................................9
3Hardware Interface Description .........................................................................................................11
3.1 Architecture Overview.............................................................................................................11
3.1.1 Digital Block..................................................................................................................11
3.1.2 Analog Block ................................................................................................................11
3.1.3 GSM Transceiver Block...............................................................................................12
3.2 Operating Modes....................................................................................................................12
3.3 Power Supply.........................................................................................................................13
3.3.1 Power Supply Design..................................................................................................13
3.3.2 Power Consumption....................................................................................................15
3.4 Power On/Off Operation.........................................................................................................16
3.4.1 Turning the G610 On...................................................................................................16
3.4.2 Turning the G610 Off...................................................................................................17
3.4.3 Turning the G610 Off Using AT Command.................................................................18
3.5 Sleep Mode............................................................................................................................18
3.5.1 Activating Sleep Mode ................................................................................................19
3.5.2 Serial Interface during Sleep Mode.............................................................................19
3.5.3 Terminating Sleep Mode .............................................................................................20
3.6 Real Time Clock.....................................................................................................................22
3.6.1 VBACKUP description.................................................................................................22
3.6.2 RTC Application...........................................................................................................23

G610 GPRS Module Hardware User Manual Page 4 of 47
3.7 Serial Interfaces.....................................................................................................................23
3.7.1 Ring indicate................................................................................................................24
3.7.2 DCD indicate...............................................................................................................25
3.8 SIM Interface..........................................................................................................................25
3.8.1 SIM Connection...........................................................................................................26
3.8.2 SIM Design Guidelines................................................................................................26
3.8.3 SIM Detected feature..................................................................................................27
3.9 Audio Interface.......................................................................................................................27
3.9.1 1st Audio Channel: Microphone...................................................................................28
3.9.2 1st Audio Channel: Speaker.........................................................................................28
3.9.3 2nd Audio Channel: Microphone..................................................................................28
3.9.4 2nd Audio Channel: Speaker........................................................................................29
3.9.5 Audio Design...............................................................................................................29
3.9.6 Switch Audio Channel by IO........................................................................................30
3.10 A/D Interface ..........................................................................................................................30
3.10.1 Power SupplyADC......................................................................................................31
3.10.2 General PurposeADC.................................................................................................31
3.11 Controls and Indicators Interface...........................................................................................31
3.11.1 VDD Reference Regulator ..........................................................................................32
3.11.2 External Reset.............................................................................................................32
3.11.3 LPG .............................................................................................................................33
3.11.4 Trace Ports..................................................................................................................34
3.11.5 General Purpose I/O...................................................................................................35
4Electrical and Environmental Specifications Absolute Maximum Ratings........................................36
4.1 Electrical Specifications Absolute Maximum Ratings............................................................36
4.2 Environmental Specifications Absolute Maximum Ratings....................................................36
4.3 Application Interface Specifications.......................................................................................36
5Mechanical Design............................................................................................................................40
5.1 G610 Mechanical Specifications............................................................................................40
5.2 Recommanded PCB layout:...................................................................................................41
5.3 Antenna Design......................................................................................................................42
5.4 Reflow temperature profile.....................................................................................................44
6Antenna Interface..............................................................................................................................45

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6.1 Antenna Installation................................................................................................................45
6.2 Antenna Subsystem...............................................................................................................45
6.2.1 Antenna Specifications................................................................................................45
6.2.2 Cable Loss ..................................................................................................................45
6.2.3 Antenna Gain Maximum Requirements......................................................................46
6.2.4 Antenna Matching .......................................................................................................46
6.2.5 PCB Design Considerations........................................................................................46

Preface
G610 GPRS Module Hardware User Manual Page 6 of 47
1 Preface
1.1 Manual Scope
This manual provides the electrical, mechanical and environmental requirements for properly
integrating the G610 GPRS module in a host application.
This manual gives a complete set of hardware features and functions that may be provided by
G610. The availability of any feature or function, which is described in this manual, depends on the
hardware revision and software version of a specific G610 GPRS module.
1.2 Target Audience
This manual is intended for all members of the integration team who are responsible for
integrating the G610 module into the host OEM device, including representatives from hardware,
software and RF engineering disciplines.
1.3 Applicable Documents
G610 GPRS Module brief
G610 GPRS Module Description
G610 GPRS ModuleAT Command Set User Manual
G610 GPRS ModuleAT Command Examples and Steps
G610 GPRS Module Developer’s Kit
G610 GPRS Module Developer’s Kit User Manual
G610 GPRS Module Developer’s Kit Schematics
G610 Flash Tool Software (for Windows XP)
G610 Mobile Analyzer Software (for Windows XP)
G610 Modem Demo Software (for Windows XP)
1.4 Standards
ETSI ETS 300 916 (GSM 07.07 version 5.9.1 Release 1996)
ETSI TS 100 585 (GSM 07.05 version 7.0.1 Release 1998)
ETSI ETS 300 901 (GSM 03.40 version 5.8.1 Release 1996)
ETSI TS 100 900 (GSM 03.38 version 7.2.0 Release 1998)
ETSI EN 300 607-1 (GSM 11.10-1 version 8.1.1 Release 1999)
ETSI TS 100 907 (GSM 02.30 version 6.1.0 Release 1997)

Preface
G610 GPRS Module Hardware User Manual Page 7 of 47
ETSI TS 100 549 (GSM 03.90 version 7.0.0 Release 1998)
ETSI TS 101 267 (GSM 11.14 version 6.3.0 Release 1997)
ETSI TS 100 977 (GSM 11.11 version 6.3.0 Release 1997)
ITU-T V.25ter
ETSI EN 300 908 (GSM 05.02 version 8.5.1 Release 1999)
ETSI TS 101 356 (3GPP TS 07.60 version 7.2.0 Release 1998)
1.5 Regulatory Approvals
1.6 FCC Notice to Users
The G610 Module has been granted modular approval for mobile applications. Integrators may use
the G610 Module in their final products without additional FCC certification if they meet the following
conditions. Otherwise, additional FCC approvals must be obtained:
1. At least 20cm separation distance between the antenna and the user’s body must be maintained at
all times.
2. To comply with FCC regulations limiting both maximum RF output power and human exposure to RF
radiation, the maximum antenna gain including cable loss in a mobile-only exposure condition must
not exceed 2dBi in the cellular band and 2dBi in the PCS band.
3. The G610 Module and its antenna must not be co-located or operating in conjunction with any other
transmitter or antenna within a host device.
4. Alabel must be affixed to the outside of the end product into which the G610 Module is incorporated,
with a statement similar to the following: For G610: This device contains FCC ID:
ZMOFIBOCOMG610
5. A user manual with the end product must clearly indicate the operating requirements and conditions
that must be observed to ensure compliance with current FCC RF exposure guidelines.
The end product with an embedded G610 Module may also need to pass the FCC Part 15 unintentional
emission testing requirements and be properly authorized per FCC Part 15.
Note: If this module is intended for use in a portable device, you are responsible for separate
approval to satisfy the SAR requirements of FCC Part 2.1093.

G610 GPRS Module Hardware User Manual Page 8 of 47
2 Introduction
2.1 Product concept
G610 GPRS Module supports four GSM bands 850/900/1800/1900 MHz, and with GPRS
multi-slot class 10, G610 can operate on any GSM/GPRS network to provide voice and data
communications.
The G610 is similar to a condensed cellular phone core, which can be integrated into any
system or product that needs to transfer voice or data information over a cellular network. Thus, it
significantly enhances the system's capabilities, transforming it from a standalone, isolated product
to a powerful high-performance system with global communications capabilities.
The G610 is designed as a complete GSM/GPRS communications solution with all the controls,
interfaces and features to support a broad range of applications:
Low cost
Wider voltage operate range
A variety set of indicators and control signals
More lower power consumption
A variety of serial communications solutions.
All these features and interfaces are easily controlled and configured using a versatile AT
command interface that provides full control over the G610 operation.
The G610 control and indication interface extends its capabilities beyond GSM communications.
This includes an A/D and GPIO interface, and a regulated output voltage for supplying external
circuits. With these interfaces, the G610 can operate and control external applications and receive
feedback from external environment and circuits.
The G610 interface design, using a single 50 pin board-to-board connector, through which all
application interfaces are managed, facilitates fast and easy integration. It significantly shortens the
development process, and minimizes the product's time to market.
The G610 is extremely compact in size with a slim mechanical design, which makes it space
saving on the application board and easily fitted into any board design.
The advanced power supply management significantly reduces power consumption to a
necessary minimum and prolongs battery life.

G610 GPRS Module Hardware User Manual Page 9 of 47
2.2 Product Specifications
Product Features
Operating systems: Quad Band
GSM850/900/1800/1900 MHz
Physical Characteristics
Size: 31.4 x 20.2 x 3.0 mm
Mounting: SMT
Weight: 3.5 grams
Operational temperature: -40°C to +85°C
Storage temperature: -40°C to +85°C
Performance
Operating voltage: 3.3 – 4.5 V (4.0V is recommended)
Current consumption: 1.6 mA @ Sleep mode
24 mA @ Idle mode
260 mA @ on call or CSD
420 mA @ on GPRS data
MAX 2.0 A @ Burst
80uA@ Power off
12uA @ RTC only
Tx power: 2 W, 850/900 MHz
1 W, 1800/1900 MHz
Rx sensitivity: 850/900MHz: -108dBm
1800/1900MHz: -107 dBm
Interfaces
SIM Card: External SIM connectivity
1.8V / 3.0 V
Serial Ports: UART:
BR from 1200 bps to 230400 bps
Auto BR from 1200 bps to 230400 bps

G610 GPRS Module Hardware User Manual Page 10 of 47
Data Features
GPRS: Multi-slot class 10 (4 Rx / 2 Tx / 5 Sum)
Max Downlink BR 85.6 kbps
Coding scheme CS1-CS4
Class B
GSM 07.10 multiplexing protocol
CSD: Max BR 9.6 kbps
SMS: MO/MT Text and PDU modes
Cell broadcast
FAX Group3 Class 2 (TS 61/62)
Voice Features
Differential analog audio lines Two channel
Vocoders EFR/HR/FR/AMR
DTMF support
Audio control: Echo suppression, noise suppression, side tone and
gain control
Others
ADC Detect BATT voltage
Detect extend analog voltage
RTC inside
Flexible status indicator
Extend reset

G610 GPRS Module Hardware User Manual Page 11 of 47
3 Hardware Interface Description
The following paragraphs describe in details the hardware requirements for properly interfacing
and operating the G610 module.
3.1 Architecture Overview
The G610 consists of the following blocks:
3.1.1 Digital Block
Micro-controller Unit (MCU) for system and application code execution.
Digital Signal Processor (DSP) for voice and data processing.
Serial communications interfaces.
SPI for trace debug or PCM audio (option)
SIM card
General purpose IO signals.
Real Time Clock (RTC) subsystem.
3.1.2 Analog Block
Power management inside.
Internal regulators
Analog audio interface management.
General purpose dedicatedA/D signals.

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BATT voltage A/D inside
3.1.3 GSM Transceiver Block
3 gain stages for the low GSM band and high GSM band
850/900/1800/1900 MHz
RF receiver, which includes LNAs, Mixers, VCOs, I/Q outputs and buffers.
Signal processing IC for transmit and receive GSM data processing.
FEM - Front End Module.
Includes a harmonic filter and antenna switch
Filter - Dual-band SAW filter that selects the required receive band.
3.2 Operating Modes
The G610 incorporates several operating modes. Each operating mode is different in the active
features and interfaces.
The table summarizes the general characteristics of the G610 operating modes and provides
general guidelines for operation.
Operating
Modes
Description Features
Not Powered BATT & Vbackup supply is
disconnected.
The G610 is off.
Any signals connected to the interface
connector must be set low or tri-state.
Power off
Mode
Val
id BATT supply but not
power on.
After reset module. Vbackup
output and VDD is off.
The G610 MCU/DSP/RF is Off.
The PMU is operating in RTC mode.
Any signals connected to the interface
connector must be set low or tri-state.
RTC Mode
Power off mode
BATT
supply is
disconnected. But valid
Vbackup supply
The G610 MCU/DSP/RF is Off.
The PMU is operating in RTC mode.
Any signals connected to the interface
connector must be set low or tri-state.
Idle Mode
Power on is succeeded and
VDD output.
CTS_N and DSR_N signals
are enabled (low).
The G610 is fully active, registered to the
GSM/GPRS network and ready to
communicate.
This is the default power-on mode.

G610 GPRS Module Hardware User Manual Page 13 of 47
Sleep Mode CTS_N signal is wave.
The G610 is in low power mode.
The application interfaces are disabled, but,
G610 continues to monitor the GSM
network.
Call or CSD call
or GPRS data LPG signal is toggling.
A GSM voice or data call is in progress.
When the call terminates, G610 returns to
the last operating state (Idle or Sleep).
3.3 Power Supply
The G610 power supply must be a single external DC voltage source of 3.3V to 4.5V. The
power supply must be able to sustain the voltage level during a GSM transmit burst current serge,
which may reach 2.0A.
The G610 interface connector has 2 pins for the main power supply, as described in the table.
All these contacts must be used for proper operation.
G610 Pin# G610 Signal name Description
26
BATT
DC power supply.
BATT = 3.3 V to 4.5 V
4.0V is recommended
27
1
GND Ground
21
22
24
25
28
46
3.3.1 Power Supply Design
Special care must be taken when designing the power supply of the G610. The single external
DC power source indirectly supplies all the digital and analog interfaces, but also directly supplies
the RF power amplifier (PA). Therefore, any degradation in the power supply performance, due to
losses, noises or transients, will directly affect the G610 performance.
The burst-mode operation of the GSM transmission and reception draws instantaneous current

G610 GPRS Module Hardware User Manual Page 14 of 47
surges from the power supply, which causes temporary voltage drops of the power supply level. The
transmission bursts consume the most instantaneous current, and therefore cause the largest
voltage drop. If the voltage drops are not minimized, the frequent voltage fluctuations may degrade
the G610 performance.
It is recommended that the voltage drops during a transmit burst will not exceed 300mV,
measured on the G610 interface connector. In any case, the G610 supply input must not drop below
the minimum operating level during a transmit burst. Dropping below the minimum operating level
may result in a low voltage detection, which will initiate an automatic power-off.
To minimize the losses and transients on the power supply lines, it is recommended to follow
these guidelines:
Use a 1000 uF, or greater, low ESR capacitor on the G610 supply inputs. The capacitor
should be located as near to the G610 interface connector as possible.
Use low impedance power source, cabling and board routing.
Use cabling and routing as short as possible.
Filter the G610 supply lines using filtering capacitors, as described in the table.
Recommended
Capacitor Usage Description
1000 uF GSM Transmit current serge
Minimizes power supply losses
during transmit bursts. Use maximum
possible value.
10 nF, 100 nF Digital switching noise Filters digital logic noises from clocks
and data sources.
300mV max
3.3V min
BATT
TX_EN

G610 GPRS Module Hardware User Manual Page 15 of 47
8.2 pF, 10 pF 1800/1900 MHz GSM bands Filters transmission EMI.
33 pF, 39 pF 850/900 MHz GSM bands Filters transmission EMI.
3.3.2 Power Consumption
The table specifies typical G610 current consumption ratings in various operating modes. The
current ratings refer to the overall G610 current consumption over the BATT supply.
Measurements were taken under the following conditions:
BATT = 4.0 V
Operating temperature 25°C
Registered to a GSM/GPRS network
The actual current ratings may vary from the listed values due to changes in the module's
operating and environment conditions. This includes temperature, power supply level and
application interface settings.
Parameter Description Conditions Min Typ Max Unit
I off Power off mode 80 90 µA
I idle Idle mode
GSM only, DRX=2,
-85dBm
GSM850/900
DSC/PCS
24 mA
I sleep Low power mode
DRX=2 3.6
mA5 2.0
9 1.6
I gsm-avg
Average current
GSM voice
1 TX slot 1 Rx slot
GSM850/900
PCL=5 260
mA
10 150
15 115
19 110
DCS/PCS PCL=0 230
5 140
10 115
15 110
I gsm-max Average current
GSM voice
GSM850/900
PCL=5 1800
2000 mA

G610 GPRS Module Hardware User Manual Page 16 of 47
1 TX slot 1 Rx slot 19 300
DCS/PCS PCL=0 1400
15 300
I gprs-avg
Average current
GPRS Class 10
2 TX slot 2 Rx slot
GSM850/900
PCL=5 420
mA
19 150
DCS/PCS PCL=0 380
15 150
3.4 Power On/Off Operation
The G610 power on and off is the two primary phases, which are related at the interface
connector by the hardware signals POWER_ON, VDD.
The POWER_ON signal is main controller.
The VDD signal indicates whether G610 is powered on or off. When this signal is disable (0V),
G610 is powered-off. When it is output (2.85V), G610 is powered-on.
Important: When the VBAT power supplied, the G610 module will be turn on automatically.
Important: The VDD would be flowed backwards by other IOs which be connected extend
voltage. So DSR/CTS/LPG can be indicated the powered on process replaced.
Important: The TXD should be pulled up continuously between the G610 turn on process.
G610 Pin# G610 Signal name Description
10 POWER_ON Power on and off module
Low level activated
9 VDD
Illustrating module start up
LDO power output 0V : G610 is power off
LDO power output 2.85V : G610 is start up
3.4.1 Turning the G610 On
When the G610 is powered off, the PMU operates at low power mode, with only the RTC timer
active. G610 will power on again when the POWER_ON signal is falling edge. Asserting the
POWER_ON signal low for a minimum of 800 milliseconds will turn G610 on.

G610 GPRS Module Hardware User Manual Page 17 of 47
The figure illustrates the G610 power on is succeeded.
The figure illustrates the G610 power on is failed.
3.4.2 Turning the G610 Off
There are several ways to turn the G610 off:
Asserting the POWER_ON signal low for a minimum of 3 seconds.
Under voltage automatic shutdown.
Overvoltage automatic shutdown.
AT command.
3.4.2.1 Turning the G610 Off Using POWER_ON
The POWER_ON signal is set high using an internal pull up resistor when power is applied to
G610. When the POWER_ON signal is falling edge and keeping low for a minimum of 3 seconds
VDD
POWER_ON
VDD
POWER_ON

G610 GPRS Module Hardware User Manual Page 18 of 47
will turn G610 off. This will initiate a normal power-off process, which includes disabling of all
applications interfaces (UART, SIM card, audio, etc.) and logout the network connection.
3.4.2.2 Undervoltage automatic shutdown
A low power shut down occurs when G610 senses the external power supply is below the
minimal operating limit (VBAT≤3.2V). The module will respond by powering down automatically
without notice.
This form of power-down is not recommended for regular use since the unexpected power loss
may result in loss of data.
3.4.3 Turning the G610 Off Using AT Command
+MRST
The AT+MRST command initiates a G610 power off operation, which powers off the G610
without logout networks.
+CFUN
The AT+CFUN=0 command initiates a G610 power off operation, which powers off the G610
with logout networks.
3.5 Sleep Mode
The G610 incorporates an optional low power mode, called Sleep Mode, in which it operates in
minimum functionality, and therefore draws significantly less current.
During Sleep Mode the G610 network connection is not lost. G610 will be waked up cycled and
monitored the GSM network constantly for any incoming calls or data. During Sleep mode, all of the
VDD
POWER_ON
Turn off failed

G610 GPRS Module Hardware User Manual Page 19 of 47
G610 interface signals are inactive and are kept in their previous state, prior to activating low power
mode. To save power, all the G610 internal clocks and circuits are shut down, and therefore serial
communications is limited.
The CTS_N signal is alternately enabled (LOW level) and disabled (HIGH level) synchronously
with Sleep Mode and Idle mode. At the same time this indicates the G610 serial interfaces are
active.
Important: G610 will not enter Sleep mode in any case when there is data present on the
serial interface or incoming from the GSM network or an internal system task is running. Only when
processing of any external or internal system task has completed, G610 will enter Sleep mode
according to the ATS24 command settings.
Important: All of the description about CTS_N, it must be set the UART to HW control by AT
command.
3.5.1 Activating Sleep Mode
By default, the G610 powers on in Idle Mode. The ATS24 default is 0. In this mode the G610
interfaces and features are functional and the module is fully active. Sleep mode is activated by the
ATS24 command. Such as ATS24 would be activated Sleep mode at soon.
3.5.2 Serial Interface during Sleep Mode
The G610 wakes up periodically from Sleep mode to page the GSM network for any incoming
RXD
CTS
ATS24=1 return OK
HIGH: disable, Sleep Mode
LOW: enable, Idle Mode

G610 GPRS Module Hardware User Manual Page 20 of 47
calls or data. After this short paging is completed, G610 returns to sleep mode. During this short
awake period, the serial interfaces are enabled and communications with the module is possible.
The CTS_N signal is alternately enabled and disabled synchronously with the network paging
cycle. CTS_N is enabled whenever G610 awakes to page the network. The period based on the
DRX parameter of the network.
4.615 ms (TDMA frame duration) * 51 (number of frames) * DRX value.
At the same time, the CTS_N indicates the G610 serial interfaces are active or inactive.
3.5.3 Terminating Sleep Mode
Terminating the Sleep mode, or wake-up, is defined as the transition of the G610 operating
state from Sleep mode to Idle mode. There are several ways to wake-up G610 from Sleep mode as
described below.
Important: During Sleep mode the G610 internal clocks and circuits are disabled, in order to
minimize power consumption. When terminating the Sleep mode, and switching to Idle mode, G610
requires a minimal delay time to reactivate and stabilize its internal circuits before it can respond to
application data. This delay is typically of 5 ms, and is also indicated by the CTS_N signal inactive
(high) state. The delay guarantees that data on the serial interface is not lost or misinterpreted.
3.5.3.1 Temporary Termination of Low Power Mode
Temporary termination of Sleep mode occurs when G610 switches from Sleep mode to Idle
mode for a defined period, and then returns automatically to Sleep mode.
Low power mode may be terminated temporarily by several sources, some of which are user
initiated and others are initiated by the system.
CTS
(DRX=2)