GSM Interface Module Datasheet
iWave Systems Technologies Pvt Ltd Page 1
Product Overview
GSM Interface Module
The GSM/ GPRS interface board supports the communication between CPU board and external devices. The board can be used to send and receive SMS as well as to make and receive calls.
The GSM / GPRS board is based on HiLoV2 GSM module. The board has a SIM connector, which is used to connect the SIM with the module and give access to the network. In the board, 6-pin header is provided for the communication with the CPU board. The board has standard DB9 connector to interface with the PC.
GSM Interface Module Datasheet
iWave Systems Technologies Pvt Ltd Page 2
Index
Technical Specification 3
Summary 3
Board Description 3
Interface Details 4
Power 4
Input & Output 5
Communication 5
SIM Specification 6
Physical Characteristics 7
Reference Schematics 8
Contact Details 12
GSM Interface Module Datasheet
iWave Systems Technologies Pvt Ltd Page 3
Summary
Board Description
Technical Specification
GSM Module: HiLoV2
Operating Voltage: 3.3V
Input Voltage (recommended): 5-5.5V
Current Consumption : 2.2A maximum during burst mode of data transfer
Antenna: FXP14 Hexa-Band Cellular Antenna (850/900/1700/1800/1900/2100MHz)
GSM Interface Module Datasheet
iWave Systems Technologies Pvt Ltd Page 4
Power
Interface Details
The board can operate on 5V DC line. Power jack (2.5mm) is provided to draw external 5V from AC to
DC Adapter. The LDO regulator present in the board steps down the voltage to 3.3V, which is the
required power supply for the GSM module.
Two 4 Pin connectors are provide on the board, to draw 5V and 3.3V directly from the main CPU board.
(These connectors can be used during testing or debugging). The power source can be selected based on
the requirement and conditions.
The Power Pins are as follows:
VCC_5V: The DC power supply used to power the switching regulator on the board.
VCC_3V3: A 3.3 volt supply generated by the on-board regulator. Maximum current drawn is
3A.This 3.3V can be also supplied from CPU board through the 4 pin power connector.
GND: Ground pins.
Table 2: Interface between GSM Interface Board and PC through UART Pin Type Signal Name Description(RS-232 compatible signals) 2 I/O UART_TX Tx Signal from GSM Module goes to Rx of PC 3 I/O UART_RX Tx Signal from PC goes to Rx of GSM Module 7 I/O UART_RTS RTS Signal from PC goes to RTS of GSMModule 8 I/O UART_CTS CTS Signal from GSM Module goes to CTS of PC
Table 1: Interface between CPU boardand GSM Interface Board Pin Type Signal Name Description 1 I/O CTS Clear to Send signal from Module 2 I/O RTS Request To Send signal to Module 3 Power GND Ground Signal 4 I/O TX Data Transmit signal from Module 5 I/O RX Data Receive signal to Module 6 Power 1.8V Power Supply
GSM Interface Module Datasheet
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Communication
Input & Output
The GSM Interface Board has a number of communicating options with CPU boardand PC.
The Different Input and Output options are detailed below:
6 Pin Header: The 6 Pin header is used for interfacing with the CPU board. It carries Transmit and Receive Signals from GSM Module along with Handshaking signals.
Standard DB9: Standard DB9 is provided for PC communication. This can also be used for Software updating as well as for CPU Board Interface.
Reset Switch: Push button Reset option is provided for Reset of the board externally by the user.
LED: An LED is provided on board to indicate 3.3V is ON.
The GSM board has a number of facilities for communicating with a computer, CPU board, another GSM
board or other GSM phones. The HiLomodule provides UART serial communication, which is available
on digital pins 26 (RX) and 13(TX).These signals are converted to TTL level (5V) and can communicate
with PC through DB9 port. The board can communicate with CPU board through the 6 pin header.
GSM Interface Module Datasheet
iWave Systems Technologies Pvt Ltd Page 6
SIM Specification
The board provides the provision to connect the SIM with the GSM module for external communication.
The signals for the management of SIM card are provided by the GSM module. Table 3 describes the pin
details of the SIM connector. To prevent SIM card’s damages, the power supply of the module has to be
turned off before any manipulation on SIM card.
The SIM card needs a power supply of 1.8V which is generated by the GSM module and directly
connected to the 1st and 5th pin of SIM connector, which provides the power supply input for SIM card.
Table 3:SIM card Interface Pin Details Pin Type Signal Name Description 1 Power VSIM 1.8V generated by the GSM module 2 Input SIM_RST SIM reset, Provided by the GSM module 3 Input SIM_CLK SIM clock provided by the GSM module 4 Power GND SIM Ground 5 Power VSIM 1.8V generated by the GSM module 6 I/O SIM_DATA SIM serial data line
GSM Interface Module Datasheet
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Physical Characteristics
The length and width of the GSM Interface Board is 70mm x 75mm respectively. Four mounting holes allow the board to be attached to a surface or case.
*All dimensions are in mm
GSM Interface Module Datasheet
iWave Systems Technologies Pvt Ltd Page 8
Reference Schematics
J1
PJ-002BH
321
VIN_5V
GND
TP2 5V1
D1
SMCJ6.0(C)A
12
C3
10uF
GND
VCC_5V
TVSDIODE
J3
External Power_5V
1234
1234
POWER IN
VCC_3V3
C6
0_1uF
EXTERNAL POWER
F1 5A
+C1
330uF
GND
VIN_5V
J2
External Power_3V3
1234
1234
C7
0_1uF
C4
0_1uF
GND
GND
TP3 GND1
GND
GSM Interface Module Datasheet
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U1
LM1117-3.3
1
42
3
56
SD
OUTIN
GN
D
ERRGN
D
R3
10K
+C5
10uF
VCC_3V3
R2
10K
GND
TP1 3.3 V1
GND
3V3 REGULATOR
GND
R1
330E
VCC_3V3
GND
VCC_5V
LED
D2
LED+C2
10uF
GND
VCC_3V3
0.1uF
C32
VCC_3V310K
R29
GND
0.47uF
C31 TPS3808G09DBVR
U5
1
23
4
5 6
RESET
GNDMR
CT
SENSE1 VDDON/OFF
GND
0E
R28
PMICSupervisor
VCC_3V3
GSM Interface Module Datasheet
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GSM_TX
DTR
RTS
R15 0 EDNPR12 0 E
GND
GSM_RTS
ON/OFF
GSM ModuleVGPIO
VGPIO
R8 0 EDNP Reset 2TP41
DSR
+ C18
47uF
VGPIO
RTS R11 0 EDNP
CTS
R7 0 E
R21
10K
R6 0 E
C1710uF
SIM_DATA 4
VCC_3V3
CTS
VSIM
SIM_RST 4
RX
J4
HiLo Module
1 2
3 4
567
89
10
11
12
1314
1516
1718
1920
2122
23
24
25
2627
2829
30
31323334
3536
37 38
39 40
41 42 43
VBA
T1
VBA
T2
GN
D1
GN
D2
UART0_TXUART0_RXRF_TX
GPIO3GPIO2
VG
PIO
UART_DSR
UART_DCD
UART_TXUART_CTS
SIM_RSTSIM_CLK
PWM0RESET
AUX_ADC0INTMIC_P
HSET_OUT_PHSET_OUT_N
PWM1
VSIM
SIM_DATA
UART_RXUART_RTS
UART_RIUART_DTR
VBA
CKU
P
POK_INGPIO1PCM_OUTPCM_IN
PCM_SYNCPCM_CLK
GN
D3
GN
D4
VBA
T3
VBA
T4
GN
D5
GN
D6
GN
D7
GSM_RX
TX
DTR
GND
R22
10K
DSR
R10 0 E
GSM_CTS
GND
SIM_CLK 4
GSM Interface Module Datasheet
iWave Systems Technologies Pvt Ltd Page 11
UART_RX
RS232 Transceiver
C22
0_1uF
U3
MAX323215
16
138
1011
13
45 2
6
129
147
GN
DV
CC
R1INR2IN
T2INT1IN
C1+C1-
C2+C2- V+
V-
R1OUTR2OUT
T1OUTT2OUT
C20
0_1uF
UART_CTS
GND
VCC_3V3
GND
C23
0_1uF
C30
0_1uF
GND
GSM_RTS
C21
0_1uF
GSM_CTS
GSM_RX
UART_TX
UART_RTS
GSM_TX
CTS
UART_RTS
GND
UART_RXGND
R16 0 EDNP
RX
R13 0 EDNP
TX
R18 0 EDNP
R20 0 EDNP
UART_TXR14 0 E
UART_CTS
GND
R19 0 EUART_TX
R17 0 E
R9 0 E
UART_RX
J5
DB9_MALE
594837261
MH2
MH1
CONNECTORS
UART_RTS
RTS
UART_CTS
TP5
1V8
1
J6
6 PIN 2.54MM HEADER
12
3
45
6
RTSCTS
GND
TXRX
VCC
GSM Interface Module Datasheet
iWave Systems Technologies Pvt Ltd Page 12
Contact Details
E-mail: [email protected]
Address: iWave Systems Technologies. Pvt. Ltd.
7/B, 29th Main,
BTM Layout, 2ndStage
Bangalore –560 076, India.
Phone: +91 80 26786243/45