G610 GPRS Module
Hardware User Manual
Version: V1.0.2
Date: 2011-03-31
Confidential Material
This document contai ns information highly con fidential to Shenzhen G&T I ndustrial Development Co.,
Ltd (Fibocom). Fib ocom offers this infor m at ion as a service to its custom er s, to support application and
engineering efforts that use the products designed by Fibocom. The information provided is based upon
requirements spec i fic al ly provided to Fibocom by the customers. A ll s pecifications supplied herein ar e
subject to change. Disc losure of this information t o other parties is pro hib it ed without the written consent
of G&T.
Copyright
Transmittal, reproduct ion, dissemination and/or edit ing of this document as well as utiliz at ion of its
contents and communication thereof to others without expr ess authorization are prohibite d. Offenders
will be held liable for payme nt of damages. All rights created by patent grant or registration of a ut i lity
model or design patent ar e r eser ved.
Copyright ©1999-2010 Shenzhen G&T Industrial Development Co., Ltd. All rig ht s r eser ved.
Revision Histor y
Version Date Remarks
V1.0.2 2011-03-31 1. Update UART description
2. Fix HS_DET description
Trademarks Notice
The FIBOCOM Logo is regist er ed 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 rig ht s r eser ved.
G610 GPRS Module Hardware User Manual Page 2 of 47
Contents
1 Preface ................................................................................................................................................ 6
1.1 Manual Scope .......................................................................................................................... 6
1.2 T arget Au dience ....................................................................................................................... 6
1.3 Applicable Documents ............................................................................................................. 6
1.4 Standards ................................................................................................................................. 6
1.5 Regulatory Approvals ............................................................................................................... 7
1.6 FCC Notice to Users ................................................................................................................ 7
2 Introduction .......................................................................................................................................... 8
2.1 Product concept ....................................................................................................................... 8
2.2 Product Specifications .............................................................................................................. 9
3 Hardware Interface Description .........................................................................................................11
3.1 Architecture Overview .............................................................................................................11
3.1.1 Digital B lock ..................................................................................................................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 t he G 610 O n ................................................................................................... 16
3.4.2 Turning t he G 610 O ff ................................................................................................... 17
3.4.3 Turning t he G 610 O ff 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 3 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 1
3.9.2 1
3.9.3 2
3.9.4 2
st
st
nd
nd
3.9.5 Audio Design ............................................................................................................... 29
3.9.6 Switch Audio Channel by IO ........................................................................................ 30
Audi o Channel: Microphone ................................................................................... 28
Audi o Channel: Speaker ......................................................................................... 28
Audio Cha nnel: M icr ophone .................................................................................. 28
Audio Cha nnel: Speaker ........................................................................................ 29
3.10 A/D Interface .......................................................................................................................... 30
3.10.1 Power Supply ADC ...................................................................................................... 31
3.10.2 General Purpose ADC ................................................................................................. 31
3.11 Controls and Indicators I nterface ........................................................................................... 31
3.11.1 VDD Reference Regulator
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
4 Electrical and Environ men tal Spec if ic at ions Absolute Maximum Ratings ........................................ 36
4.1 Electrical Spec ific atio ns Absolute Maximum Ratings ............................................................ 36
4.2 Environmental Specifications Absolute Maximum Ratings .................................................... 36
4.3 Application Interface S pe c ificat ions ....................................................................................... 36
5 Mechanical Design ............................................................................................................................ 40
5.1 G610 Mechanical S pecifications ............................................................................................ 40
.......................................................................................... 32
5.2 Recommanded PCB layout: ................................................................................................... 41
5.3 Antenna Design ...................................................................................................................... 42
5.4 Reflow temperature profile ..................................................................................................... 44
6 Antenna Interface .............................................................................................................................. 45
G610 GPRS Module Hardware User Manual Page 4 of 47
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
G610 GPRS Module Hardware User Manual Page 5 of 47
Preface
1 Preface
1.1 Manual Scope
This manual provides the elect rical, mechanical and env ir onmental requirements for properly
integrating the G610 GPR S m odule 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 featur e or function, which is described in this manual, depends on the
hardware revision and sof t ware version of a specific G610 GPRS mo dule.
1.2 Target Audience
This manual is intended for all members of the integr at ion team who are responsible for
integrating the G610 module i nt o t he host OEM device, including repr esent atives from hardware,
software and RF engineer ing d isciplines.
1.3 Applicable Documents
G610 GPRS Module brief
G610 GPRS Module Description
G610 GPRS Module AT Command Set User Manual
G610 GPRS Module AT Command Examples and Steps
G610 GPRS Module Develo per’s Kit
G610 GPRS Module Develo per’s Kit User Manual
G610 GPRS Module Develo per’s Kit Schematics
G610 Flash Tool Software (for Windows XP)
G610 Mobile Analyzer Software (for Windows XP)
G610 Modem Demo Sof t ware (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)
G610 GPRS Module Hardware User Manual Page 6 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 199 8)
Preface
1.5 Regulatory Approvals
1.6 FCC Notice to Users
The G610 Module has been grant ed modular approval for mob ile applications. Integrators may use
the G610 Module in their fina l products without addition al F C C cer t i fication if they meet the following
conditions. Otherwise, additional FCC approvals must be obt ained:
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 limiti ng both maxi mum RF o utput power a nd hu man expo sure t o RF
radiation, the maximum antenna gain including cable loss in a mobile-only exposure condition must
not exceed 2dBi in the cellular ba nd 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. A labe l must be af fixe d to t he out s id e of t he end pr od uct into wh ich th e G 610 M odu le is in corp orat ed,
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 ensur e compliance with current FC C RF exposure guidelines.
The end product with an embedded G610 Module may also nee d t o pass the FCC Part 15 unintent ional
emission testing requirements and be properly aut horized per FCC Part 15.
Note: If this module is int end ed f or use in a portable dev i ce, you are responsible for separate
approval to satisfy the SAR requirements of FCC Part 2.1093.
G610 GPRS Module Hardware User Manual Page 7 of 47
2 Introduction
2.1 Product concept
G610 GPRS Module suppor t s four G SM bands 850/900/1800/19 00 MHz, and with GPRS
multi-slot class 10, G610 can operate on any GSM/ GPRS network to provide voice and d at a
communications.
The G610 is similar to a condensed cellular phone core, which can be integrated into any
system or product that ne eds t o transfer voice or data informatio n over a cellular network. Thus, it
significantly enhances t he system's capabilities, transforming it from a standalone, isolated product
to a powerful high-performance syst em with global communications capabilities.
The G610 is designed as a complete G SM/G PRS com municat ions so lution wit h all the cont rols,
interfaces and features to su pport a broad range of applicatio ns:
Low cost
Wider voltage operate r ange
A v ar iet y set of indicators and control sign als
More lower power consu mption
A v ar iety of serial communications so l ut ions.
All these features and inte r face s ar e easily controlled and configured using a versatile AT
command interface that pr ovides full control over the G610 operation.
The G610 control and i ndication inter face ext ends it s capabi lities bey ond GS M commu nications.
This includes an A/D and G PI O inter face, and a regulated output v oltage for supplying external
circuits. With these inter fa ces, the G610 can operate and contr ol ext ernal applications and rece ive
feedback from external environment and circuits.
The G610 interface design, using a single 50 pin board-to-board conn ector, through which all
application interfaces are managed, facilitates fast and easy integration. It significant ly shortens the
development process, an d m inimizes the product's time to market.
The G610 is extremely comp act 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 ma nagement significantly r educes power consumption to a
necessary minimum and prolongs battery life.
G610 GPRS Module Hardware User Manual Page 8 of 47
2.2 Product Specifications
Operating systems: Quad Band
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
Product Features
GSM850/900/1800/1900 MHz
Physical Characteristics
Performance
Operating voltage: 3.3 – 4.5 V (4.0V is recomme nded)
Current consumption: 1.6 mA @ Sl eep 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, 85 0/ 900 MHz
1 W, 18 00/ 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 230 400 bps
Auto BR from 1200 bps t o 230400 bps
G610 GPRS Module Hardware User Manual Page 9 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 p r ot oco l
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 10 of 47
3 Hardware Interface Description
The following paragraphs descr ibe in deta ils t he hardw are requir e ments for pr operly int erfac ing
and operating the G610 module.
3.1 Architecture Overview
The G610 consists of the f ollowing blocks:
3.1.1 Digital Block
Micro-controller Unit (MCU) for syst em and application code execution.
Digital Signal Proc essor (DSP) for voice and data processing.
Serial communications interfaces.
SPI for trace debug or PCM audi o ( 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 ma nagement.
General purpose dedicated A/D signals.
G610 GPRS Module Hardware User Manual Page 11 of 47
Any signals connected to the interface
Power off
id BATT supply but not
Any signals connected to the interface
supply is
disconnected. But valid
Any signals connected to the interface
GSM/GPRS network and ready to
BATT voltage A/D inside
3.1.3 GSM Transceiver Block
3 gain stages for the low G SM 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 dat a pr ocessing.
FEM - Front End Module.
Includes a harmonic filter and ant enna switch
Filter - Dual-band SAW filter that selects the requ ir ed receive band.
3.2 Operating Modes
The G610 incorporates se v eral operati ng modes. Ea ch operating mode is different in the activ e
features and interfaces.
The table summarizes the gener al characteristics of the G 610 operating modes and provides
general guidelines for operation.
Operating
Description Features
Modes
The G610 is off.
BATT & Vbackup supply is
Not Powered
disconnected.
connector must be set low or tri-state.
Mode
RTC Mode
Val
power on.
After reset module. Vbac kup
output and VDD is off.
Power off mode
BATT
Vbackup supply
The G610 MCU/DSP/RF is O ff.
The PMU is operating in RTC mode.
connector must be set low or tri-state.
The G610 MCU/DSP/RF is O ff.
The PMU is operating in RTC mode.
connector must be set low or tri-state.
Power on is succeeded and
VDD output.
Idle Mode
CTS_N and DSR_N signal s
are enabled (low).
G610 GPRS Module Hardware User Manual Page 12 of 47
The G610 is fully active, registered to the
communicate.
This is the default power-on mode.
G610 continues to monitor the GSM
A GSM voice or data call is in progress.
The G610 is in low power mode.
The application interfac es are disab led, but ,
Sleep Mode CTS_N signal is wave.
network.
Call or CSD call
or GPRS data
LPG signal is toggling.
When the call terminates, G610 returns to
the last operating stat e ( I dle or Sleep).
3.3 Power Supply
The G610 power supply mu st be a single external DC voltage so ur ce of 3.3V to 4.5V. The
power supply must be able to sustain the voltage level durin g a GSM transmit burst current serge,
which may reach 2.0A.
The G610 interface conne ctor 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
27
1
21
22
24
GND Ground
25
28
46
3.3.1 Power Supply Design
Special care must be take n w hen designing the power supply of t he G 610. The single external
DC power supply.
BATT = 3.3 V to 4.5 V
4.0V is recommended
DC power source indirectl y supplies all the digital and analog inter f aces, but also directly supplies
the RF power amplifier (P A). Ther efore, any degradation in the pow er supply performance, due to
losses, noises or transient s, will directly affect the G610 per formance.
The burst-mode operat ion of t he G SM t r ansmission and reception dr aw s instantaneous current
G610 GPRS Module Hardware User Manual Page 13 of 47
Minimizes power supply losses
surges from the power supply, which causes temporary voltage drops of the pow er supply level. Th e
transmission bursts consume the most instantaneous cur r ent , and therefore cause the largest
voltage drop. If the voltage drops ar e not minimized, the frequent voltage fluctuations may degrade
the G610 performance.
BATT
300mV max
3.3V min
TX_EN
It is recommended that th e voltage drops during a transmit burst will not exceed 300mV,
measured on the G610 inter face connect or. In any case, the G610 su pply inpu t must not drop be low
the minimum operating level during a transmit burst. Dropping below the minimum operating level
may result in a low voltage det ection, which will initiate an auto m at ic power-off.
To minimize the losses and t r ansie nts 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 t o t he G 610 int erface connector as possible.
Use low impedance powe r so ur ce, cabling and board routing.
Use cabling and routing a s sh or t 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
10 nF, 100 nF Digital switching no ise Filters digital logic noises f r om clocks
G610 GPRS Module Hardware User Manual Page 14 of 47
during transmit bursts. Us e maxi mu m
possible value.
and data sources.
8.2 pF, 10 pF 1800/1900 MHz GSM bands Filters transmission EMI.
33 pF, 39 pF 850/900 MHz GSM bands Filters trans miss ion EMI.
3.3.2 Power Consumption
The table specifies typical G610 current consumptio n r at ings in various operating modes. T he
current ratings refer to the overall G610 current consumption over the BATT supply.
Measurements were ta ken under the following condition s:
BATT = 4.0 V
Operating temperatur e 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 t emperature, power supply level and
application interface settings.
Parameter Description Conditions Min Typ Max Unit
I off Power off mode 80 90 µA
GSM only, DRX=2,
-85dBm
I idle Idle mode
24
GSM850/900
DSC/PCS
DRX=2 3.6
I sleep Low power mode
9 1.6
GSM850/900
PCL=5
260
10 150
I gsm-avg
Average current
GSM voice
1 TX slot 1 Rx slot
DCS/PCS PCL=0 230
15 115
19 110
5 140
mA
mA 5 2.0
mA
10 115
15 110
I gsm-max
Average current
GSM voice
G610 GPRS Module Hardware User Manual Page 15 of 47
GSM850/900
PCL=5
2000
mA
1800
1 TX slot 1 Rx slot 19 300
DCS/PCS PCL=0 1400
GSM850/900
Average current
I gprs-avg
GPRS Class 10
2 TX slot 2 Rx slot
DCS/PCS PCL=0 380
3.4 Power On/Off Operation
The G610 power on and off is the two primary phas es, which are related at the interfa ce
connector by the hardware signals POWER_ON, VDD.
The POWER_ON signal is main controller.
15 300
PCL=5
19 150
15 150
420
mA
The VDD signal indicates whether G610 is powered on or of f. 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 auto matically.
Important: The VDD would be flowed backward s by other IOs which be connected ext end
voltage. So DSR/CTS/LP G can be indicated the powered on pr ocess replaced.
Important: The TXD should be pulled up continuo usly between the G610 turn on process.
G610 Pin# G610 Signal name Description
10 POWER_ON
9 VDD
LDO power output 0V : G610 is power off
LDO power output 2.85V : G 610 is start up
Power on and off module
Low level activated
Illustrating module st ar t 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 fall ing edge. Asserting the
POWER_ON signal low for a minimum of 800 milliseco nd s will turn G610 on.
G610 GPRS Module Hardware User Manual Page 16 of 47
The figure illustrates the G610 power on is succeeded.
VDD
POWER_ON
The figure illustrates the G 610 pow er on is failed.
VDD
POWER_ON
3.4.2 Turning the G610 Off
There are several ways to t ur n t he G 610 of f:
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 re sistor when power is applied to
G610. When the POWER _O N signal is falling edge and keeping l ow for a minimum of 3 seconds
G610 GPRS Module Hardware User Manual Page 17 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, et c. ) and logout the network connection.
POWER_ON
VDD
Turn off failed
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 r ecommended 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 comman d 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 G 610
with logout networks.
3.5 Sleep Mode
The G610 incorporates a n optional low power mode, call ed Sleep Mode, in which it oper at es in
minimum functionality, and therefore draws signific antly less current.
During Sleep Mode the G 610 networ k con necti on is not lost. G 610 will be wa ked up cy cled and
monitored the GSM net work constantly for any incoming calls or data. During Sleep mode, all of the
G610 GPRS Module Hardware User Manual Page 18 of 47
G610 interface signals ar e inactive and are kept in their previous state, prior to activat ing low power
mode. To save power, all the G 610 internal clocks and circuits are shut down, and therefore serial
communications is limited.
The CTS_N signal is alter nat ely enabled (LOW level) and disabled (HIGH level) synchronous ly
with Sleep Mode and Idle mode. At the same time this indicates the G61 0 ser ial interfaces are
active.
Important: G610 will not enter Sleep mode in any case whe n t her e is data present on the
serial interface or incom ing from the GSM network or an inter nal system task is running. Only when
processing of any external or internal system task ha s completed, G610 will enter Sleep mode
according to the ATS24 comm and settings.
Important: All of the description about CTS_N, it must b e set t he UA RT to HW control by AT
command.
3.5.1 Activating Sleep Mode
By default, the G610 powers on in I dle Mode. The ATS24 default is 0. I n t his mode the G610
interfaces and features are functional and the module is fully active. Sleep mode is activ at ed by the
ATS24 command. Such as ATS24 would be activated S leep mode at soon.
CTS
HIGH: disable, Sleep Mode
LOW: enable, Idle Mode
RXD
ATS24=1 return OK
3.5.2 Serial Interface during Sleep Mode
The G610 wakes up periodically from Sleep mode to page the GSM network for any incoming
G610 GPRS Module Hardware User Manual Page 19 of 47
calls or data. After this shor t paging is completed, G610 ret ur ns t o sleep mode. During this short
awake period, the serial int er faces are enabled and commun ications with the module is possible.
The CTS_N signal is alter nat ely enabled and disabled synchron ously with the network paging
cycle. CTS_N is enabled whenever G610 awakes to page the network. The period based on t he
DRX parameter of the network.
4.615 ms (TDMA frame duration) * 51 (number of frames) * DRX value.
At the same time, the CTS_N in dicates the G610 serial interfaces are active or inactive.
CTS
(DRX=2)
3.5.3 Terminating Sleep Mode
Terminating the Sleep mo de, or wake-up, is defined as the transition of the G610 operating
state from Sleep mode to I dle mod e. There are several ways to w ake-up G610 from Sleep mode as
described below.
Important: During Sleep mode the G610 internal clocks and circuits are d isabled, in order to
minimize power consumption. When terminating the Sleep mode, and switching to Idle mode, G 610
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 ind icated by the CTS_N signal inactiv e
(high) state. The delay gu ar ant ees t hat data on the serial interfa ce is not lost or misinterpreted.
3.5.3.1 Temporary Termination of Low Power Mode
Temporary termination of Sleep mode occ ur s w hen G610 switches from Sleep mode to Idle
mode for a defined period, and t hen r et ur ns automatically to Sleep mode.
Low power mode may be term inat ed temporarily by several sources, some of which are user
initiated and others are ini t iat ed by the system.
G610 GPRS Module Hardware User Manual Page 20 of 47
Incoming Network Data
During Sleep mode, G610 continues monitoring the GSM net w ork for any incoming data,
message or voice calls. When G610 receives an indication from the network that an incoming voice
call, message or data is available, it automatically wa kes up from Sleep mode to alert the
application. When G610 wakes up to Idle mode all its inter f aces are enabled.
Depending on the type of net w ork indication and the application settings, G610 may operate in
several methods, which are co nfigurable by AT commands, t o al er t the application of the incoming
data:
a) Enable the serial interface's CTS_N
b) Send data to the application over the serial interface.
c) Enable the serial interface 's R ing I ndicator (RING_N) signal.
d) LPG status indicator
Data on the Serial interface
During Sleep mode, serial co mm unications is limited to shor t per iod s, while G610 is paging the
network. When the serial int er face is active, data can be exchan ged between the application and
the G610. The G610 will not r et ur n to Sleep mode until the serial interface transmission is
completed and all the data is processed.
Only when the serial interface tr ansfer is co mplet ed and t he data is proc esse d , G 610 will return
to Sleep mode automatica lly , acco rding to the ATS24 settings.
CTS
ATS24=1
RXD
a) The G610 serial interfaces be set HARDWARE FLOW (AT+IFC=2,2)
If the G610 serial interfaces be set HARDWARE FLOW by AT+IFC com ma nd, and the DTE
serial interfaces was runni ng with HARDWARE FLOW, the TX D dat a w ill be sent to G610 by
G610 GPRS Module Hardware User Manual Page 21 of 47
CTS_N enabled, the data will not be lost. And G610 will go back to Idle mode for response.
b) The G610 serial interfaces be set NONE FLOW (AT+IFC=0,0)(Th e default value)
If the G610 serial interfaces be set NONE FLOW by AT+IFC command, and the DTE serial
interfaces was runn ing with NONE FLOW, the TX D data will be sent to G610 anytime, the data will
be lost. But then G610 wil l go back to idle mode if data and CTS_N enabled at the same time.
3.5.3.2 Permanent termination of Sleep Mode
The G610 Sleep mode is enabled and disabled by the ATS 24 command.
ATS24 : ATS24 = 0 disables Sleep mode. The val ue of ATS24 (>0) will be saved but the
mode will not be save by re-power G 610.
3.6 Real Time Clock
G610 incorporates a Rea l Time C lock ( RT C) mecha nism th at per for ms ma ny i nter nal functions,
one of which is keeping time. The RTC subsystem is embedded in the PMU and operates in all of
the G610 operating modes (Off, Idle, Sleep), as long as power is supplied above the minimum
operating level.
When the main power was not supply, the backup battery or ca pacitor can be supplied to RTC
by interface connector VB AC KUP.
When the main power supply and VBACKUP is disconnected from G610, the RTC timer will
reset and the current time and date will be lost. On the next G610 pow er-up the time and date will
need to be set again automatically or manually.
3.6.1 VBACKUP description
G610 Pin# G610 Signal name Description
8 VBACKUP Real time clock power
When main power BATT is su pplied. The VBACKUP output 2.0V/0.3mA current for
external battery or capacitor charging
When main power BATT is disconnected. The VBACKUP supply the RTC by. External
battery or capacitor. The RT C p ower consumption is about 12uA. T he voltage cannot be
over 2.2V.
The VBACKUP is supplied by a capacitor. The backup time c an be calculated by
capacitance approxi mately.
G610 GPRS Module Hardware User Manual Page 22 of 47
T(s) ≈ C(uF)/1.3
3.6.2 RTC Application
The G610 time and date can be set using the following methods:
Automatically retrieved from the GSM network. In case G610 i s operated in a GSM
network that supports autom at ic t i m e zone updating, it will update t he R TC with the local
time and date upon connect ion to the networ k. The RTC wi ll continue t o keep the tim e from
that point.
Using the AT+CCLK com ma nd. Set t ing the time and date manually by this AT commands
overrides the automatic network update. Once the time and dat e are manual ly updated,
the RTC timer will keep the time and date synchronized regar dl ess of the G610 operating
state.
3.7 Serial Interfaces
G610 includes one completely independent serial c om m unications interfaces (UA RT).
The G610 UART is a standard 8-signal bus. This UART is used for all the communications with
G610 - AT commands int erface, GPRS/EGPRS dat a and CSD data, programming and software
upgrades.
The UART signals are acti ve low CMOS level signals. For st andard RS232 communications
with a PC, an external transceiver is required.
G610 is defined as a DCE device, and the use r application is defined as the D TE device. The se
definitions apply for the UART signals naming conventions, and the direction of data flow, as
described in the figure.
G610
Pin#
45 RXD_N
44 TXD_N
G610
Signal name
Description Feature Direction
Module
Transmitted Dat a
Module
Received Data
DTE
DCE→DTE
Received Data
DTE
DTE→DCE
Transmitted Dat a
39 RING_N
Module
Ring indicator
Module
38 DSR_N
Data Set Ready
G610 GPRS Module Hardware User Manual Page 23 of 47
Notice DTE Remote
DCE→DTE
Call
DCE Was Ready DCE→DTE
DTE Notice DCE
42 RTS_N Request To Send
DTE→DCE
Requested To Send
40 DTR_N Data T er minal Ready DTE Was Ready DTE→DCE
Module
43 CTS_N
Clear To Send
DCE Switch To
DCE→DTE
Received Mode
Data Carrier Was
41 DCD_N Data Carrier Detect
DCE→DTE
Online
The recommended connection was seeing as below.
Application MCU G610 Module
RXD Pin 45 RXD_N
TXD Pin 44 TXD_N
RI Pin 39 RING_N
DSR Pin 38 DSR_N
RTS Pin 42 RTS_N
DTR Pin 40 DTR_N
CTS Pin 43 CTS_N
DCD Pin 41 DCD_N
The G610 UART supports baud r at es 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200,
230400 bps. Auto baud ra t e det ect ion is supported for baud rates up to 230400 bps.
All flow control handsha ke s ar e supported: hardware or none.
The UART default port configuratio n is 8 data bits, 1 stop bit and no parity , with None
flow control and auto baud rate detect enabled.
Important: The auto baud will be availability at the first time afte r power on. The UART will be
no answer probably if switch to another baud rate at working.
3.7.1 Ring indicate
The RING_N signal serv es to indicate incoming calls and other t ypes of URCs (Unsolicited
Result Code). It can also be used to send pu lses to t he host app licat ion, for exam ple to wake up t he
G610 GPRS Module Hardware User Manual Page 24 of 47
application from power saving state.
In IDLE mode, the RING_N is h igh. It is only indicating a type of event at a t ime:
a) When a voice call comes in, the RING_N line goes low for 1 second and high for
another 4 seconds. Every 5 seconds as a cycle.
b) When a FAX call comes in, the RING_N lin e low for 1s and high for another 4 s. Every
5 seconds as a cycle.
c) When a Short massage com es in, the RING_N line to low for 15 0 m S, and always
high.
3.7.2 DCD indicate
The DCD_N signal serves to indicate CSD call or GPRS data mode. The detail definit io n r ef er s
to AT&C command.
3.8 SIM Interface
The G610 incorporates a SI M interface, which conforms to the G SM 11. 11 and GSM 11.12
standards, which are based on the ISO/IEC 7816 standard. These standards define the e lectrical,
signaling and protocol specifications of a GSM SIM card.
The G610 does not incorp orate an o n-board SI M card t ray for SIM pl acement. The SIM must be
located on the user applic ation b oard, extern al to t he G610. Th e G610 SIM int erface in cludes al l the
necessary signals, which are rout ed to the interface conn ector, for a direct and comp lete connecti on
to an external SIM.
G610 GPRS Module Hardware User Manual Page 25 of 47
The G610 supports 1.8V or 3. 0V SI M car d automatic. While the G610 t ur n on by POWER_ON.
At first SIM_VCC output 1.8V voltage for external SIM card communication. If it is not successful
SIM_VCC output 2.85V voltage and communicated SIM ca rd again.
Important: If SIM_VCC is supplied, remove SIM card is prohibited. In case, it would da m age
both SIM card and G610.
G610 Pin# G610 Signal name Description
5 SIM_CLK Serial 3.25 MHz clock
2 SIM_VCC 2.85V Supply to the SIM
4 SIM_DATA Serial input and output data
6 SIM_RST Active low SIM reset signal
3 SIM_CD SIM card on site detected
3.8.1 SIM Connection
The figure illustrates a ty pi cal SIM interface connection to G610. This connection type is
implemented on the G610 Developer Board, using an MOLEX SI M tray, PN 912283001 &
912360001.
3.8.2 SIM Design Guidelines
The SIM interface and sig nals d esign is extremely important for proper operation of G610 and
the SIM card. There are several design gui delines that must be followed to achieve a robust and
stable design that meets t he r equired standards and regulations.
The SIM should be locate d, and it s si gnals should be routed, away from any possible EMI
G610 GPRS Module Hardware User Manual Page 26 of 47
sources, such as the RF ant enna and digital switching signals.
The SIM interface signals len gth should not exceed 100 mm between the G610 interface
connector and the SIM tray. This is to meet with EMC regulations and improve signal
integrity.
To avoid crosstalk betwee n t he SI M clock and data signals (SIM_CLK and SIM_DATA), it
is recommended to rout them s eparately on the application boar d, and preferably isolated
by a surrounding ground plan e.
The SIM card signals sho uld b e pr ot ected from ESD using very low capacitance protective
elements (zener diodes, e t c.). The recommended part no of ES D is
AVR-M1005C080MTAAB (TDK). We also recommended the ESD component should
layout with SIM hold closely.
3.8.3 SIM Detected feature
When set AT+MSMPD= 1, t he SI M det ect ed feature will be actives. The SIM card is on site or
not will be detected with SIM _C D pi n.
SIM_CD=Low level, SIM c ar d is onsite and register the network automatically.
SIM_CD=High or NC, SIM ca r d is o ff s ite and G610 drop out the network.
Important: The default value of MSMPD para meter is “0”. A nd also, the SIM dete cted f ea ture
was disabled correspondingly.
3.9 Audio Interface
The G610 audio interface supp ort s tw o chan nel au dio dev ice s an d oper ating modes. T he aud io
interface's operating modes, active devices, amplification levels and speech proces sing algorithms
are fully controlled by the host application, through advanced pr ogr amming options and a versatile
AT commands set.
G610 Pin# G610 Signal name Description
13 MIC14 MIC+
11 AUXI+
12 AUXI-
G610 GPRS Module Hardware User Manual Page 27 of 47
1st Audio channel
Balanced microphone input
2nd Audio channel
Balanced microphone input
Output is balanced and can directly operate an head set
16 EAR-
1st Audio channel
15 EAR+
18 AUXO+
2nd Audio channel
Output is balanced and can directly operate an hand
17 AUXO-
free speaker
3.9.1 1st Audio Channel: Microphone
This channel is the G610 pow er -up default active audio channel.
The microphone input includes all the necessary circuit r y to support a direct connection to a n
external microphone devi ce. It incorporates an internal bias voltage which can be adjuste d by AT
command. It has an impe dance of 2 kΩ.
The bias voltage would be suppl ied after a voice call establish.
Parameter Conditions Min Typ Max Unit
Bias Voltage
No load
1.8 2.0 2.2 V
Gain Programmable
in 3 dB steps
AC Input
2 kΩ
Impedance
3.9.2 1st Audio Channel: Speaker
This channel is the G610 pow er -up default active output for voice calls and DTMF tones. It is
designed as a differential output with 32Ω impedance.
Parameter Conditions Min Typ Max Unit
No load Single
Output Voltage
ended
AC Output
32 Ω
Impedance
DC Voltage 1.38 V
3.9.3 2nd Audio Channel: Microphone
0 45 dB
200 mVPP
This channel is switched on by AT Command.
The microphone input includes all the necessary circuit r y to support a direct connection to a n
external microphone devi ce. It incorporates an internal bias voltage which can be adjuste d by AT
G610 GPRS Module Hardware User Manual Page 28 of 47
command. It has an impe dance of 2 kΩ.
The bias voltage would be suppl ied after G610 powered on.
Parameter Conditions Min Typ Max Unit
Bias Voltage
No load
Gain Programmable
in 3 dB steps
AC Input
2 kΩ
Impedance
3.9.4 2nd Audio Channel: Speaker
This channel is switched on by AT Command. It is designed a s a differential output and can be
droved a 8Ω speaker directly.
Parameter Conditions Min Typ Max Unit
2.5 V
0 45 dB
No load Single
500 mVPP
Output Voltage
ended
AC Output
8 Ω
Impedance
DC Voltage 1.38 V
3.9.5 Audio Design
The audio quality delivered by G610 is highly affected by t he appl ication audio design,
particularly when using the analog audio interface. Therefore, special care must be taken when
designing the G610 audio inter f ace. Improper design and imple mentation of the audio interface wi ll
result in poor audio quality.
Poor audio quality is a result of e lect rical interferences, or nois es, from circuits surrounding t he
audio interface. There are several possible sources for the audio noise:
Transients and losses on t he power supply
EMI from antenna radiations
Digital logic switching noi se
Most of the audio noise originat es from the GSM transmit burst cur r ent surges (217 Hz TDMA
buzz), which appear on the ma in power supply lines and antenna, but al so i ndirectly penetrate the
internal application's supplies and signals. The noises ar e t r ansferred into the G610's audio circuits
G610 GPRS Module Hardware User Manual Page 29 of 47
through the microphone input signa ls a nd the n are a mplif ied by the G 610's inte rnal a ud io am plifier s.
To minimize the audio noise and improve the audio perfor manc e t he microphone and speaker
signals must be designed w it h suf f ici ent pr ot ection from surrounding noises.
The following guidelines should be followed to achieve best audio performance:
Reference the microphon e input circuits to the G610 AGND int er f ace signal.
If using single-ended aud i o outputs, they should be referenced to the G610 AGND
interface signal.
Keep the audio circuits away from the antenna.
Use RF filtering capacitors on the audio signals.
The audio signals should not be r out ed adjacent to digital signal s.
Isolate the audio signals by a surrounding ground plane or shields.
Filter internal supplies and signals that may indirectly affect the audio circuits, from noises
and voltage drops.
3.9.6 Switch Audio Channel by IO
The G610 support switch audio channel by IO pin. The default level of this pin is high. This IO
pin is took effect under 1st channel is activated.
When the IO is pulled low, the audio cha nnel w ill be switche d fro m 1st channel to 2nd channel
automatically. When the IO level is back to High, the audio channel will be back to 1st channel.
If the audio 2nd channel is activated, this PIN wil l not do any effect at all.
G610 Pin# G610 Signal name Description
1st channel is activated.
47 HS_DET
Level = Low, the 2nd channel is activ at ed
Level = High, back to the 1st channel
Notes： After the MAPATH command was switch t he audio channel, this PIN will not do any
effect at all.
3.10 A/D Interface
The G610 includes 3 Ana log t o Dig ital Co nv erter (ADC) ( 2 AD C and 1 B ATT ADC ) sign als w ith
12-bit resolution, for environmental and electrical m easur ements. The ADC signals accept an
analog DC voltage level on their in puts and convert it to a 12-bit digital value for further processing
by G610 or the user application.
In Idle mode, the ADC input is sampled consecutive times by sa m pl ing time interval, and the
G610 GPRS Module Hardware User Manual Page 30 of 47
lasted 8 samples are compar ed and averaged to provide a stab le and valid result.
In Sleep mode, the ADC is stopped. When the G610 switch t o I dle mode, the ADC should be
stable after 5mS.
3.10.1 Power Supply ADC
The main power supply (BATT) is sampled internally by the G610 ADC interface thr ough a
dedicated input, which is not accessible on the interface connect or . The G610 constantly monitors
the power supply for any low or high v olt age.
Parameter Conditions Min Typ Max Unit
Supply Range Operating range 3.20 4.50 V
Resolution 1.0 %
Sampling Time 16 KHz
The ADC signals operation and reporting mechanis m is defined by the AT+CBC command.
3.10.2 General Purpose ADC
The G610 provides 2 general purpose ADC signal for custo mer application use. The ADC
signal can monitor a sepa r at e external voltage and report its meas ur ed level independently t o t he
application, through the AT command interface.
G610 Pin# G610 Signal name Description
19 ADC2 General purpose ADC 20 ADC1 General purpose ADC
Parameter Conditions Min Typ Max Unit
Input V oltage Operating range 0 1.00 V
Resolution 0.5 %
Sampling Time 16 KHz
The ADC signals operation and reporting mechanis m is defined by the AT+MMAD command.
3.11 Controls and Indicators Interface
The G610 incorporates se veral interface signals for contr ol li ng and monitoring the module's
operation. The following paragraph describes these sign als and their operation.
G610 GPRS Module Hardware User Manual Page 31 of 47
G610 Pin# G610 Signal name Description
LDO power output
9 VDD
Illustrating module st ar t up
49 LPG Module work status ind icator
Extend reset module
7 RESET_N
Low level activated
3.11.1 VDD Reference Regulator
The G610 incorporates a regulated voltage output VDD. The regulator provides a 2.85V output
for use by the customer appl ication. This regulator can source up to 30 mA of current to power any
external digital circuits.
When the G610 started up by power on signal, The VDD is output. So it can be Illustrating
module start up.
Important: The VDD regulator is powered from the G 610's main power supply , and t her efore
any current sourced through t his regulator ori ginate s from the G610 B ATT supply. The overall BA TT
current consumed by G 610 is dir ectly affected by the VDD operation. The G610 current
consumption raises with respect to the current sourced t hr ough VDD.
Parameter Conditions Min Typ Max Unit
Vout Iout=30mA -3% 2.85 3% V
Iout 10 30 mA
Current pulled down from LDO
Imax
to GND until LDO voltag e is
150 mA
50% of nominal value
External
-35% 1 35% uF
Capacitor
PSRR 50 Hz - 20 kHz 35 dB
3.11.2 External Reset
The RESET_N input signal w ould be power off the G610 immediately. This signal is set high
after power up, when G610 is op er ating. It is set low when G610 is powered off.
When the RESET_N signal is low, the G610 is powered o ff without the work net logging out.
Important: It’s recommended that it should connect he 1 nF capacitor to GND on external
G610 GPRS Module Hardware User Manual Page 32 of 47
circuit.
Parameter Conditions Min Typ Max Unit
T width 100 200 400 mS
3.11.3 LPG
As an alternative to gener ating th e synchron ization signal, the c ontrol pin ca n be us ed to drive a
status LED on application platform. The timing of LPG, it can be ind icated the G610 status straight .
Referenced circuits about LED driver see below.
States of the LED vs PIN: LED Off = HIGH. LED On = LOW.
LED state Operating status of G610
Permanently off G610 is in one of the following modes:
• Power off mode
• SLEEP mode
600 ms on / 600 ms off G610 is in one of the following status:
• NO SIM card
• SIM PIN
• Register network (T<15S)
• Register network failure (always)
3 s on / 75 ms off G610 is in one of the following status:
• IDLE mode
75 ms on / 75 ms off G610 is in one of the following status:
• One or more GPRS contexts activated.
Permanently on G610 is in one of the following status:
• Voice call
• CSD or FAX call
G610 GPRS Module Hardware User Manual Page 33 of 47
When the G610 PO WER ON , t he LPG t i mi ng see as below:
POWER_ON Register network IDLE mode
3.11.4 Trace Ports
The GSM/GPRS network and G610 module is incorporat ed a complicated system. The G610
prepared the trace function for debugged or acquired t he dat a of the system. The G610 transfer
these data from SPI port. I t can be operated on the PC software a nd execute by SPI adaptor to
RS232.
Important: It’s recommend that reserved these ports and connected to a socket in any
design.
G610 Pin# G610 Signal name Description
53
50
52
PCM_DIN
Trace data input
TR_MISO
PCM_FS
Trace data output
TR_MOSI
PCM_CLK
Trace clock output
TR_CLK
51
General purpose I/O
TR_CS
48 TR_INT Trace Interrupt I nput
G610 GPRS Module Hardware User Manual Page 34 of 47
PCM_DOUT
3.11.5 Ge neral Purpose I/O
The G610 incorporates 8 gener al purpose IO signals for the user applicati on. Each GPI O signa l
may be configured and co nt r olled by AT command. These signa ls may be used to control or set
external application circuits, or to receive indications from the external application.
G610 Pin# G610 Signal name
35 GPIO01 Bit1
34 GPIO02 Bit2
33 GPIO03 Bit3
32 GPIO04 Bit4
37 SCL/GPIO18 Bit5
36 SDA/GPIO19 Bit6
31 GPIO07 Bit7
Description
54 GPIO36 Bit8
G610 GPRS Module Hardware User Manual Page 35 of 47
4 Electrical and Enviro nm ental Specifications Absolute
Maximum Ratings
4.1 Electrical Specifications Absolute Maximum Ratings
The table gives the maxim um e lectrical characteristics of the G 610 interface signals.
Caution: Exceeding the values may result in permanent damage to the module.
Parameter Conditions Min Max Unit
BATT Supply -0.2 4.5 V
Digital Input Signals G610 powered on
VDD Domain
Analog Input Signals
(Audio, A/D interfaces)
G610 powered on -0.2 2.75 V
-0.2 3.3 V
4.2 Environmental Specifications Absolute Maximum Ratings
The table gives the enviro nm ent al operating conditions of the G610 module.
Caution: Exceeding the values may result in permanent damage to the module.
Parameter Conditions Min Max Unit
Ambient Operating
Temperature
Storage Temperature -40 85 °C
At antenna port
ESD
Air At plane ± 8 KV
-40 85 °C
± 4 KV
Contact
4.3 Application Interface Specifications
The table summarizes the DC electrical specificatio ns of the application interface connector
signals.
Important: Interface signals that are not used by the customer application must be left
unconnected. G610 incor porat es the ne cess ary internal c ircu itry to keep u nconne ct ed signa l in the ir
G610 GPRS Module Hardware User Manual Page 36 of 47
default state. Do not conn ect any components to, or apply any voltage on, signals that are not used
by the application.
G610 Pin# G610 Signal name Description I/O
Power
26
27
1
21
22
24
25
28
46
8 VBACKUP Real time clock power I/O 2.0V 2.0V
29 CHARG_CDT
30 CHARG_CS
49 LPG Work mode indicator O CP Wave
9 VDD
7 RESET_N
10 POWER_ON
45 RXD_N Received Data O CP H
44 TXD_N Transmitted Data I CP H
39 RING_N Ring indicator O CP H
38 DSR_N Data Set Ready O CP H
42 RTS_N Request T o Send I CP H
BATT DC power supply I 3.3V ~ 4.5V
GND Ground
Charge power detect signal
High level activated
Charge switch control
Extend transistor
Control & Status
LDO power output
Illustrating start up
Extend reset**
Low level activated
Turn on module
Low level activated
Uart (Modem DCE)
I PD L
I OC/PD L
O 0.3V 2.85V
I PU/HZ H
I PU/HZ H
Reset
level
Idle
level
Level Character
1.86V ~ 2.14V
Output current <3mA
Input current <12uA
=0.35V
VOL
MAX
VOHMIN=VDD-0.35V
±3%
Output current <10mA
=0.2V
VIL
MAX
VIHMIN=0.7*VDD
=0.2V
VIL
MAX
VIHMIN=0.7*VDD
220K PU to VBACKUP
=0.35V
VOL
MAX
VOHMIN=VDD-0.35V
VILMAX=0.2V
VIHMIN=0.7*VDD
40 DTR_N Data Terminal Ready I CP H
G610 GPRS Module Hardware User Manual Page 37 of 47
43 CTS_N Clear T o S end O CP L
41 DCD_N Data Carrier Detect O CP H
SIM Interface (3.0V)
2 SIM_VCC SIM power O 0.3V
5 SIM_CLK SIM clock O T 3.58MHz
4 SIM_DATA SIM data I/O OD/PD Wave
6 SIM_RST SIM reset O T L
SIM on site detect
3 SIM_CD
53 PCM_DIN Trace data input I CP H
50 PCM_FS Trace data output O CP H
52 PCM_CLK Trace clock output O CP L
51 PCM_DOUT General purpose I/O O CP H
High level is on site
PCM audio / Trace (SPI)
I T L
1.8V
2.85V
±3%
Output current <10mA
=0.35V
VOL
MAX
VOHMIN=VSIM-0.35V
VILMAX=0.2*VSIM
VIHMIN=0.7*VSIM
VOLMAX=0.35V
VOHMIN=VDD-0.35V
VILMAX=0.2
VIHMIN=0.7*VDD
48 TR_INT Trace Interrupt Input I CP H
Audio
13 MIC14 MIC+
11 AUXI+
12 AUXI- 0V
16 EAR15 EAR+
18 AUXO+
17 AUXO-
23 RF_ANT RF antenna port
47 HS_DET Headset detect
19 ADC2 General purpose A/D I 0V 0V 0V ~ 1.000V
20 ADC1 General purpose A/D I 0V 0V 0V ~ 1.000V
36 SDA/GPIO19 I2C_SDA I/O OD OD
37 SCL/GPIO18 I2C_SCL I/O OD OD
1st Audio channel (default)
Balanced input
2nd Audio channel
Balanced input
1st Audio channel (default)
Balanced output
2nd Audio channel
Balanced output
Discrete
I 0V 0V
I 0V
O 0V 0V
O 0V 1.0V
2.85V
Extend voltage
31 GPIO07 General purpose IO I T T VOLMAX=0.35V
G610 GPRS Module Hardware User Manual Page 38 of 47
35 GPIO01 General purpose IO O T T
34 GPIO02 General purpose IO O T T
33 GPIO03 General purpose IO O T T
32 GPIO04 General purpose IO O T T
54 GPIO36 General purpose IO O CP H
55 NC
注：
1. CP=Center Pin; T= 3 Status; PD= Pull Down; PU=Pull Up; OD=Open Drain
2. Description & I/O： Standard Version
VOHMIN=VDD-0.35V
VILMAX=0.2V
VIHMIN=0.7*VDD
G610 GPRS Module Hardware User Manual Page 39 of 47
5 Mechanical Design
5.1 G610 Mechanical Specifications
G610 GPRS Module Hardware User Manual Page 40 of 47
5.2 Recommanded PCB layout:
G610 GPRS Module Hardware User Manual Page 41 of 47
5.3 Antenna Design
The RF I/O Antenna signal is by default provided to 50 ohm antenna interface. In user’s main
board, the Antenna layout should be design 50 ohm Microstr ip Transmission Line.
The Microstrip Transmission Line is better handled by PCB v endor. We also provide a sample
50 ohm unbalanced transm ission system.
The PCB parameters that affect impedance:
Track width (W)
PCB substrate thickness ( H)
PCB substrate permittivity (εr)
To a lesser extent, PCB copper t hi ckness (T) and proximity of same layer ground plane.
Antenna characteristics are essential for good functi onality of the module. The radiating
performance of antenn as has d irect impa ct on the reliabi lity of con nection over the A ir Interfa ce. Bad
termination of the antenna can r esult in poor performance of the module.
G610 GPRS Module Hardware User Manual Page 42 of 47
The following parameter s sh ould be checked:
Item Recommendations
Impedance 50 Ω
Frequency
Range
Depends on the Mobile N et work used.
GSM900: 880~960 MHz
GSM1800: 1710~1880 MHz
GSM850: 824~894 MHz
GSM1900: 1850~1990 MHz
Input Power >2 W peak
V.S.W.R <2:1 recom me nded
<3:1 acceptable
Return Loss S11<-10 dB recommended,
S11<-6 dB acceptable
Gain < 3 dBi c
Typically GSM antennas are available as:
Linear monopole: typical f or fix ed application. The antenna ext ends mostly as a linear element
with a dimension compara ble to l ambda/4 of the lowest frequency of the operating band. Magnet ic
base may be available. Cabl e or direct RF connectors are commo n opt i ons. The integration
normally requires the fulfillment of some minimum g uid elines suggested by antenna man uf act ur er .
Patch-like antenna: better suited for integr at i on in compact designs (e.g. mobile phone). They
are mostly custom designs where the exact definition of the P C B and product mechanical des ign i s
fundamental for tuning of antenna characteristics.
For integration observe t hese r ecommendations:
Ensure 50 Ω antenna termination minimize the V.S.W.R. or return loss, as this will optimize the
electrical performance of the module.
Select antenna with best r adi at ing performance.
If a cable is used to connect t he ant enna r adiating element to application board, select a short
cable with minimum insertion loss. The higher the a dditi onal insertion loss due to low quality or long
cable, the lower the connect iv it y .
Follow the recommendati ons of the antenna manufacturer for cor rect installation and
deployment
Do not include antenna wi t hin cl osed metal case.
G610 GPRS Module Hardware User Manual Page 43 of 47
Do not place antenna in c lose vicinity to end user si nce the emitted radiation in human tissue is
limited by S.A.R. regulatory requirements.
Do not use directivity antenna since the electromagnetic field radiation intensity is limited i n
some countries.
Take care of interaction bet ween co-locate d RF syst ems since the G SM trans mitted power may
interact or disturb the perf or m ance of companion systems.
Place antenna far from se nsitive analog systems or employ co unt ermeasures to reduce
electromagnetic compatibility issues that may arise.
The modules are designed to work on a 50 Ω load. However, real antennas have no perfect 50
Ω load on all the supported frequency bands. To reduce as much as possible performance
degradation due to antenn a m ismatch, the following requirements should be met:
Measure the antenna ter m ination with a network analyzer: connect the antenna through a
coaxial cable to the measurement dev ice, the |S11| ind icates w hich portion of the power is delivered
to antenna and which portion i s r ef lect ed by the antenna back to the modem output .
A good antenna should have a |S11| below -10 dB over the ent ire frequency band. Due to
miniaturization, mech ani cal constraints and other desig n is su es, t his value will not be achieved. A
value of |S11| of about -6 dB - ( in the worst case) - is acceptable.
5.4 Reflow temperature profile
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6 Antenna Interface
The RF interface of the G610 M odule has an impedance of 50Ω. The module is capable of
sustaining a total mismatc h at t he antenna connector or pad without any damage, even when
transmitting at maximu m RF power.
The external antenna mus t be matched properly to achieve best perf ormance regarding radiated
power, DC-power consum pt ion, modulation accuracy and har m onic suppression. Antenna matching
networks are not included on the G610 Module PCB and shoul d be placed in the host application.
Regarding the return loss, the Module provides the followin g values in the active band:
Table 6-1 Return Loss in the Act iv e Band
State of Module
Receive ≥ 8dB ≥ 12dB
Transmit not applicable ≥ 12dB
The connection of the antenna or ot her equipment must be de coupled from DC voltage. This is
necessary because the antenna connector is DC coupled to ground via an inductor for ESD prot ection.
Return Loss of
Module
Recommended Return
Loss of
Application
6.1 Antenna Installation
The G610 Module has no ant enna connector, so antenna will be installed on the customer
application board.
6.2 Antenna Subsystem
The antenna sub-syste m and its design is a major part of the final prod uct integration. Special
attention and care should be t aken in adhering to the following guidelines.
6.2.1 Antenna Specif ications
Choice of the antenna cable (t ype, length, performance, RF loss, etc) and antenna connector (type
+ losses) can have a major impact on the success of the design.
6.2.2 Cable Loss
All cables have RF losses. M ini m iz ing t he l engt h of the cable between the antenna and the RF
connectors on the module will help obtain superior perfor m ance. High Quality/Low loss co-axial cables
should be used to connect t he ant enna t o the RF connectors. Contact t he antenna vendor for the
G610 GPRS Module Hardware User Manual Page 45 of 47
specific type of cable that int erfaces w ith their ant enna and ask th em to det ail the R F losses o f the cab les
supplied along with the antenna. Typically, the cable length s hould be such that they have no more t han
1-2dB of loss. Though the system will work with longer (lossy ) cables, this will degrade GSM system
performance. Care should also be taken to ensure that the cab le en d
Connectors/terminations are well assembled t o m in imize losses and to offer a reli able, sturdy
connection to the Module sub-system. This is particular ly im por t ant f or applications where the module i s
mounted on a mobile or por t able e nvironment where it is subject t o shock and vibration.
6.2.3 Antenna Gain Maxi m um Re quirements
Our FCC Grant imposes a maximum gain for the ant enna subsystem: 2 dBi for the GSM850 band
and 2dBi for the 1900 band.
Warning: Excessive gain could da m age sensitive RF circuits and v oid the warranty.
6.2.4 Antenna Matching
The module’s RF connectors are designe d t o work with a 50-ohm subsystem. It is assumed that t he
antenna chosen has matc hing internal to it to match between t he 50-ohm RF connectors an d t he
antenna impedance.
6.2.5 PCB Design Consi de rations
• The antenna subsystem should be treated like any other RF sy stem or component. It should be
isolated as much as possible from any noise generating cir cuitr y including the interface signal s via
filtering and shielding.
• As a general recommendat ion all components or chips oper ating at high frequencies such as
micro controllers, memory , DC/D C conver ts and ot her RF compone nt s shou ld not be placed too close t o
the module. When such c ases exist, correct supply and ground de-coupling areas should be designed
and validated.
• Avoid placing the components around the RF connection and close to the RF line between the RF
antenna and the module.
• RF lines and cables should b e as shor t as possible.
• If using coaxial cable it should not be placed cl ose to devices operating at low frequencies. Sign als like
charger circuits may requi r e some EMI/RFI decoupling such as f ilter capacitors or ferrite beads.
• Adding external impedance matching to improve the match to your cable and antenna asse m blies is
optional. Please contact t he ant enna vendor for matching requirements.
• For better ESD protection one can implement a shock co il to ground and place it close to the RF
G610 GPRS Module Hardware User Manual Page 46 of 47
connector.
G610 GPRS Module Hardware User Manual Page 47 of 47
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