GT2GM-M Wireless Module User Manual Status
[ ]Draft
[ ]Release
[]Revise File Indicator Current Version Author Date EL_GT2GM-M Hardware Design Guide 1.2 2012-07-18 Montage Asia 2011 1 Version History Version Author Attendee Date Remark V1.0 V1.1 V1.2 Cheng 2012-03-20 2012-04-18 Added some options for pin 2012-05-25 Montage Asia 2011 2 Contents Revision History..........................................................................................................................2 Contents ...3 Version History ................................................................................................................................. 2 Introduction ............................................................................................................................... 4 1 1.1 Overview ............................................................................................................................. 4 1.2 Electrical features ................................................................................................................ 4 1.3 RF features .......................................................................................................................... 4 1.4 SW features ......................................................................................................................... 4 1.5 Terms and Abbreviations ..................................................................................................... 4 2 Feature....................................................................................................................................... 5 3 Block Diagram .......................................................................................................................... 6 ELECTRICAL SPECIFICATION ............................................................................................ 6 4 4.1 Supply Voltage .................................................................................................................... 6 4.2 Recommended Operation Conditions ................................................................................. 6 4.3 Power Consumption ............................................................................................................ 7 4.4 Radio Performance .............................................................................................................. 8 4.5. Output power...................................................................................................................... 8 4.6 Sensitivity ........................................................................................................................... 8 PIN definition.......................................................................................................................... 10 Functional description ............................................................................................................. 11 ANT PORT............................................................................................................ 11 6.1 6.2 VBAT Pin (Pin 2~4) .............................................................................................. 12 6.3 Charge in Pin (Pin 1) ............................................................................................. 12 6.4 UART interface .............................................................................................................. 12 6.5 GPIOs .................................................................................................................... 13 6.6 LED ....................................................................................................................... 13 6.7 SIM card interface .......................................................................................................... 13 6.8 Power on ........................................................................................................................ 14 7 Mechanical Structure(mm)...................................................................................................... 15 8 Important announcement ......................................................................................................... 16 9 Construction and setup ............................................................................................................ 17 5 6 Montage Asia 2011 3 1 Introduction 1.1 Overview The GT2GM-M module is a tiny, standards-based, wireless data modem that provides GPRS wireless data connectivity, it suitable for embedding environment in some wireless products, such as wireless modemhandheld computersGPS Tracker other machine-to-machine devices and vertical applications. In addition, The GT2GM-M module allows you access to the Internet easier and convenient. 1.2 Electrical features Input supply voltage:
VBATMin 3.3 V, Max 4.2V Typical DC power consumption(Total):
Standby current: 2 mA GPRS1Tx+4RxData current: 300 mA350 mA MCP(Nordflash+SRAM) working current:20mA@1.8V Baseband CPU working current:40mA@2.8V RF Power amplifier working current:500mA@3.8V 1.3 RF features 2G band support : PCS 1.9GHz Support for GPRS multi-slot class 12 1.4 SW features Standard AT command interface embedded TCP/IPUDP protocol stack 1.5 Terms and Abbreviations Joint Test Action Group Analog to Digital Converter light-emitting diode JTAG ADC LED PA UART RF I/O PD PU Power Amplifier Radio Frequency Input / Output Pull Down Pull Up Universal Asynchronous Receiver and Transmitter Montage Asia 2011 4 GPIO general purpose input or output port 2 Feature Item Temperature range Weight (in g) Physical dimension Connector Type Power supply Power consumption SIM card GPIOs UART Power on key pin System Voltage
(GPIO Voltage) Input/Output Impedance
(ANT impedance) TCP/IP,UDP Description Normal range: -20C to +70C (full compliant) Storage: -40C to 85C 6g (typical) 29.5 x 26.0 x 2.4 mm 36 Pin stamp External input : 3.3V to 4.2V Off mode: 0 A (typical) Sleep mode: 0.8mA Standby mode: 2.0mA Support 3.0V SIM card Support 8 GPIOs output UART1:For debug and flash download, RF calibration or AT command Communication. UART2:For data service Low level for power on system. 2.8V 50 ohm Built-in TCP/IP ,UDP protocol stack Montage Asia 2011 5 3 Block Diagram Figure 1 GT2GM-M Block Diagram 4 ELECTRICAL SPECIFICATION 4.1 Supply Voltage Symbol Parameter VBAT Voltage Ripple Input current VBAT PMIC, PA 2%, 0~100kHz (Max. valuesnot exceeding operating voltage) Min 3.3 Typ 3.8 Max 4.2 Unit V 1.2 A 4.2 Recommended Operation Conditions 4.2.1 TEMPERATURE, HUMIDITY Symbol Parameter Ambient Operation Temperature Storage Temperature Ta Ts Humidity Relative Humidity Min Typ Max Unit 20 40 25 70 85 95%
C C
Montage Asia 2011 6 4.2.2 Digital signal DC electrical specifications Symbol Parameter Min Typ Max Unit VCC Regulated VIL VIH 2.7 0.3 0.65*VCC 2.8 0 2.8 2.9 0.35*VCC VCC+0.3 V V V V Supply voltage input level Low voltage High voltage 4.3 Power Consumption level input The power consumption is typical value measured at 25 C temperature. Parametmeters Min Typ Max Opernation Input Voltage Data transfer 1Rx 1Tx Data transfer
(clasee12) 4RX,1TX Off mode 850MHZ 1900MHZ 850MHZ 1900MHZ PCL=5,TX=33dBm PCL=19,TX=5dBm PCL=0,TX=30dBm PCL=15,TX=0dBm PCL=5 PCL=0 GPRS GPRS 3.4 3.6 4.2 500 600 700 382 375 373 162 311 138 387 339 154 152 308 305 131 127 385 381 335 331 Unit V uA mA mA mA mA mA mA Montage Asia 2011 7 4.4 Radio Performance Over full range of values specified in the Recommended Operation Condition Features Frequency Band Max. TX power Description GPRS: Dual band, 850/1900 Class 4 (+33dBm 2dB) for EGPRS 850 Class 1 (+30dBm 2dB) for PCS/GPRS 1900 4.5. Output power TRP(dBm) Designation TX TX TX TX TX TX TCH Freq(MHz) 128 824.20 190 836.60 848.80 251 1850.20 512 1880.00 661 1909.80 810 Conducted Power (dBm) 31.5 31.5 31.5 28.5 28.5 28.5 FS SPEC 26.50 25.50 Test criterion CTIA 2.2.2 CTIA 2.2.2 Band GSM 850 GSM 1900 4.6 Sensitivity Band Designation Freq(MHz) TIS(dBm) TCH Conducted Sensitivity
(dBm) FS SPEC Test criterion Montage Asia 2011 8 GSM 850 GSM 1900 RX RX RX RX RX RX 869.20 881.60 893.80 1930.20 1960.00 1989.80 128 190 251 512 661 810
-99.00 CTIA 2.2.2
-101.00 CTIA 2.2.2
-107.00
-107.00
-107.00
-107.00
-107.00
-107.00 Montage Asia 2011 9 5 PIN definition Pin name DI R Pin Numbe GND I r 5,7,16, 17 32,33,3 435,36 First Function(Note 1) Second function(Note 1) Ground Same as left GSM ANT I/O 6 VBAT VCHG System_reset I I I 2,3,4 1 9 Antenna feed point Power supply Battery Charging input port (DC 5V7V) System reset pin(low level valid) Same as left Same as left Same as left Same as left GPIO3 I/O 8 General purpose input or output port with pull KCOL4 up 47K PWRKEY I 10 POWER KEY(low level valid in 2 seconds) Same as left SIMDAT I/O 11 SIMCLK SIMRST SIMVCC I I I 12 13 14 SIM card data signal SIM card clock signal General purpose input output Same as left Same as left Same as left SIM card power supply(Need added C=100nF Same as left to GND) VIO O 15 2.8V@100mA output DC voltage Same as left GPIO45 I/O 18 General purpose input or output port with pull KROW7 down 47K URXD1 I/O 19 UART 1 data receiving port(for debug, Same as left download S/W, AT command) UTXD1 I/O 20 UART 1 data transmitting port(for debug, Same as left download S/W, AT command) UTXD2 I/O 21 UART 2 data transmitting port URXD2 I/O 22 UART 2 data receiving port Same as left Same as left Montage Asia 2011 10 LED I 23 LED sink port Same as left GPIO1 I/O 24 General purpose input or output port with pull KCOL6 up 47K,or interrupt input GPIO2 I/O 25 General purpose input or output port with pull KCOL5 up 47K EINT0 I 26 Interrupt input port Same as left GPIO33 I/O 27 General purpose input or output port with pull Speaker negative down 47K GPIO44 I/O 28 General purpose input or output port with pull Speaker positive down 47K LED_GPS SCL SDA I O 29 30 I/O 31 LED sink port (For GPS signal indication) Same as left I2C Serial clock port or GPIO15 Microphone positive I2C Serial data port or GPIO17 Microphone negative Note 1: You can only use first function or second function in one time, dont using alternately. Default is first Function. 6 Functional description 6.1 ANT PORT In this module, we have one antenna port (PIN 6:ANT) for signal transfer. To reduce the RF trace loss, the antenna port in the module had better be as close as possible to the antenna pad in the PCB. For maximum transmitter power and receiver sensitivity, a 50 transmission line is suggested to connect the antenna pad and the antenna port of the module. In addition, the RF signal will be impacted by high data rate. We strongly suggest the audio trace and SIM signal trace to be short as possible and as far away as possible from the RF trace and power line. To prevent cross coupling, signal traces on your PCB must not be routed through the module backside. Montage Asia 2011 11 M5206 Module Figure2 GT2GM-M module placement The antenna pad in your PCB should be 3~5mm wide and there must not be any other traces and ground under the pad. If needed, the matching network can be added between the antenna pad and antenna port. The recommended circuit is shown as below:
Figure 3 GT2GM-M Antenna match 6.2 VBAT Pin (Pin 2~4) The Power amplifier is supplied by the VBAT pin. During transmitting mode, high output power will draw a large amount of current. The width of this power trace that is connected to the VBAT pin could not be less than 60mil. In addition, it is better to shunt a 100uf@6.3V (low ESR) bypass capacitor on VBAT pins to prevent voltage drop and to reduce ripple.(The maximum current should be 1500mA in some time) 6.3 Charge in Pin (Pin 1) In this module,we added the charge manage circuit for lithium battery , the max charge Circuit should be 400mA. The charge voltage 5.5V+/-0.5V. 6.4 UART interface The UART1 used as debug software download or as AT command control Pin name DIR Pin Number Function unit TXD1 RXD1 O I 20 19 UART 1 data transmitting port UART 1 data receiving port Montage Asia 2011 12 The UART2 used as transmitting DATA between the module from user, only supply 2 signals as follow table:
Pin name DIR Pin Number Function unit TXD2 RXD2 O I 21 22 UART 2 data transmitting port UART 2 data receiving port This module also support baud rate from 9600 to 921600 6.5 GPIOs The GT2GM-M module has 8 GPIOs (PIN8,PIN18,PIN24,PIN25,PIN27, PIN28, PIN30,PIN30): Please refer to corresponding programming application for details as to all the GPIO ports. 6.6 LED GT2GM-M module has 2 LED driver pin(pin23 & pin29), please ref. the following sch. 6.7 SIM card interface In the Current Version of hareware,The module includes a SIM Socket.When the user use this interface,You must use the Voltage Dependent Resistor (VDR) or TVS component on the transmission signal in the same time.The SIM Card digital interface in the GT2GM-M ensures the translation of logic levels between GT2GM-M and the SIM Card, for the transmission of 3 different signals: clock signal (SIMCLK,PIN12), reset signal (SIMRST,PIN13) from GT2GM-M to the SIM Card; and serial data signal from GT2GM-M to the SIM Card (SIMDATA,PIN11). The SIM card interface can be programmed to drive a 3.0V SIM Card. Importance that the Voltage Dependent Resistor (VDR) or TVS component is necessary on the transmission signal , and the bias cap is lower than 30pF was suggested. The bypass cap of VCC net was suggested 1uF, and it must be added in your design. Montage Asia 2011 13 SIMDATA 1 VDR/TVS
. C401 NC 2 SIMCLK NC VDR/TVS 1
. 2 SIMRST SIMVCC 1
. NC VDR/TVS 2 3 2 1 Clock SIM_data RESET Vpp 6 5 SIM_Vcc 7 8 GND 4 GND GND 10 9 GND GND 2 1uF1 SIM Socket reference circuit Figure4 SIM card interface 6.8 Power on The pin 10(powerkey) is for power on the module, please keep 2 seconds low level and then turn to high level to power on the module. Montage Asia 2011 14 7 Mechanical Structure(mm) Montage Asia 2011 15 BOTTOM VIEW 8 Important announcement The device complies with Part 15 of the FCC Rules. Operation is subject to the condition that this device does not case harmful interference ;changes or modifications not expressly approved by the party responsible for compliance could void the users authority to operate the equipment. This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
-- Reorient or relocate the receiving antenna.
-- Increase the separation between the equipment and receiver.
-- Connect the equipment into an outlet on a circuit different from that to which the receiver is Montage Asia 2011 16 connected. Consult the dealer or an experienced radio/TV technician for help. Please notice that if the FCC identification number is not visible when the module is installed inside another device, then the outside of the device into which the module is installed must also display a label referring to the enclosed module. This exterior label can use wording such as the following: Contains FCC ID:N69-715000 any similar wording that expresses the same meaning may be used. The antennas used for this transmitter as shown in this filing must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter 9 Construction and setup The Module test is comprised of following basic steps. The first is to put the DUT into module test jig and the second is to connect the PC terminal emulator and start the measurement tool,and then stop the test program:
1) Setup the test platform a. Supply the DC POWER to JIG:Voltage=3.8V and Current=1.0A b. Connect the PC UART to the JIG,and then open the software tool SSCOM32 Montage Asia 2011 17 c. Put the GT2GM-M module into the JIG,connect the HP8960 with RF cable Montage Asia 2011 18 2) Start to test Send the AT command to the module by the software tool, and then the user can control the module by PC Montage Asia 2011 19 3) End the test program The user can stop the test program by AT command ATH 10.Installation information The Tracker uses a simple cabling arrangement and supports splicing into an OBDII exten-sion for power. Connection to the vehicle is made through a 3mm pitch rectangular header con-nection common to the automotive market. As any GPS location device, the Module should be installed in a vehicle, so that it has an unob-structed view of the sky during normal operation. Double sided foam tape can be used to secure the surface not facing the sky, if needed. Montage Asia 2011 20