GT47/GT48 Technical Description Product Photo/Illustration
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Contents 1. Introduction .............................................................................................................. 4 1.1 1.2 1.3 1.4 1.5 2. 12 16 22 24 25 25 26 Features Implementation ......................................................................................... 27 ......................................................................................... 27 TCP/IP Stack......................................................................................................
1. INTRODUCTION 1. Introduction 1.1 Description The GT47/GT48 is an intelligent GSM/GPRS control terminal that encapsulates everything you need for wireless M2M capability in one compact unit. In conjunction with Sony Ericsson’s M2mpower package the GT47/48 can host and control your wireless application, minimising the need for extra components. Alternatively, it can be used as a powerful standalone GPRS modem with its intrinsic TCP/IP stack.
1. INTRODUCTION • • • • • • • SMS: mobile-originated, mobile-terminated, cell broadcast Fax: Group 3, Classes 1 & 2 15 way high density connector 5 V - 32 V d.c. input 4-wire audio connection Antenna connection (FME male) R&TTE type approved (GT47) 1.3 Main Features and Services The GT47 performs a set of telecom services (TS) according to GSM standard phase 2+, ETSI and ITU-T.
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1. INTRODUCTION 1.3.4 Data Services The GT47 supports the following data protocols: • *356 *HQHUDO 3DFNHW 5DGLR 6HUYLFH GT47 is a Class B terminals, which provide simultaneous activation and attachment of GPRS and GSM services. GT47 is a GPRS class 8 (4+1) enabled devices, which are capable of transmitting in one timeslot per frame (up link), and receiving at a maximum of four timeslots per frame (down link). • &6' &LUFXLW 6ZLWFKHG 'DWD GT47 is a capable of establishing a CSD communication at 9.
1. INTRODUCTION Once a path has been set up, voice or data communication can take place. An RS232 9-signal serial interface is available via the GT47’s 15-way high density data connector. This primary serial interface can be used to: 1. Control the GT47 via an external PC or micro-controller using AT commands; 2. Send and receive data. The GT47 supports the full set of AT commands according to GSM 07.05 and GSM 07.07.
1. INTRODUCTION 1.3.9 Interfacing with the GT47 The GT47 uses the following industry standard connectors; • 15 pin high density socket (RS232 serial port and extended I/O interface) • RJ12 (plug-in power supply and extended I/O connector) • RJ9 (handset audio connector) • Integral SIM card reader • FME male (antenna connector) 1.
2. MECHANICAL DESCRIPTION 2. Mechanical Description 2.1 Overview The pictures below show the mechanical design of the module along with the positions of the different connectors and mounting holes. The module case is made of durable PC/ABS plastic. LED Antenna connector Access to SIM card RS232 serial and extended I/O connector Figure 2.1 Module viewed from the left side Mounting hole (x2) Audio connector Power supply and extended I/O connector Figure 2.
2. MECHANICAL DESCRIPTION 2.2 Physical Dimensions 3.5 71 (x 45.3 51.0 66.4 .5 2) 9.0 26.2 55.3 10.6 11.0 11.0 77.4 Measurements are given in millimetres. See also “Technical Data”, page 32.
3. ELECTRICAL DESCRIPTION 3. Electrical Description All electrical connections to the module are protected in compliance with the standard air (8 kV) and contact (4 kV) Electrostatic Discharge (ESD) tests, of EN 61000-4-2. The module uses the following industry standard connectors: • High density 15 pin (RS232 serial and extended I/O interface) • RJ12 6-way (power supply and extended I/O connector) • RJ9 4-way (handset connector) • SIM card reader • FME male coaxial jack (antenna connector) 3.
3. ELECTRICAL DESCRIPTION The power connector electrical characteristics are listed below: Note! Pin Signal Dir Limits Description 1 VIN I 5 - 32 V Positive power input 2 OUT-2 O 32V, 0.25A Low side switch, short circuit protected 3 IN-1 I –0.5 - 32 V Digital Input VIH > 3V, VIL < 2.8 V Internal Pull Down of 40KΩ 4 TO_IN I –0.5 - 32 V Active low control line used to switch the GT47 off/on. VIH > 5 V, VIL < 2 V Power off/on: t > 0.
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3. ELECTRICAL DESCRIPTION ([WHQGHG , 2 6LJQDOV Digital Inputs The digital input IN-1 is available on pin 3 of the RJ12 connector. Its state is detected by IO5 of the embedded GR47 engine, see GT47-GR47 signal cross reference table, page 21. The distinction between low level and high level signals is at the voltage level of 3 V. Voltages above 3 V are detected as high level voltages and voltages below 2.8 V are detected as low level.
3. ELECTRICAL DESCRIPTION 3.2 RS232 Serial and Extended I/O Interface The GT47 supports a standard 9 signal RS232 serial interface (EIA/TIA 574) on the 15 pin high density connector together with a range of configurabe I/Os including a second 4-wire RS232 interface. 11 12 13 14 15 6 7 8 9 10 1 2 3 4 5 1 DCD 2 RD 3 TD 4 IN-3 5 OUT-3 6 DSR 7 RTS 8 CTS 9 4.
3. ELECTRICAL DESCRIPTION Pin GT47 Signal Dir Max. Voltage limits Description 9 4.8V O 0 - +4.8V, 75mA Voltage supply for external devices Supply voltage +4.8V, max. current 75mA 10 RI O ±13.2V RS232 signal: Ring indicator VRXW ≥ ±5V 11 IN-2 I -0.5 - 32V Digital input V,+ > 3V, V,/ < 2.8V PullDown with 40KΩ 12 OUT-4 O 32V, 0.25A low side switch, short circuit protected 13 DTR I ±25V RS232 signal: Data Terminal Ready V,/ < 0.6V, V,+ > 2.
3. ELECTRICAL DESCRIPTION 3.2.4 Control Signals - RTS, CTS, DTR, DSR, DCD, RI RTS and CTS are capable of transmitting at 1/10 th of the data transmission speed for data rates up to 230.4kbps (byte-oriented flow control mechanism). 5HTXHVW WR 6HQG 576 3LQ Used to condition the GT47 for data transmission. The default level is inactive by internal pull down. The exact behaviour of RTS is defined by an AT command. Software or hardware control can be selected. Hardware flow is the default control.
3. ELECTRICAL DESCRIPTION Alternative Configuration It is possible to reconfigure one or more of the signals in this section (RTS, CTS, DTR, DSR DCD and RI) to be used as digital inputs or outputs if the full RS232 serial interface is not required. Configuration is achieved using AT command (AT+E2IO) or via embedded application intrinsic functions, please refer to GT47-GR47 signal cross reference table, page 21.
3. ELECTRICAL DESCRIPTION low side switches return to open circuit when deactivated. This allows the external application hardware to determine the desired logic voltage levels with the appropriate pull-up. The output drivers are low side switches which short the pin to GND if they are activated. Note! As an alternative configuration signals OUT-3 and OUT-4 can be used to support a second RS232 serial interface as CTS-2 and RD-2. Further information is given below. 9 2XWSXW 6XSSO\ 3LQ There is a
3. ELECTRICAL DESCRIPTION GT47 - GR47 Signal Cross-reference Table A GT47 / GT48 GT47 Pin GT47 Primary Signal Relationship to the GR47/GR48 engine Dir. GR47 Pin Corresponding GR47 Signal HD15 Connector 1 DCD O 38 DCD 2 RD I 42 RD 3 TD O 41 TD 4 IN-3 I 43 IO7 5 OUT-3 O 44 IO8 6 DSR O 32 DSR 7 RTS I 39 RTS 8 CTS O 40 CTS 9 +4.
3. ELECTRICAL DESCRIPTION GT47-GR47 Signal Cross-reference Table B GT47 / GT48 GT47 Pin GT Alternative signal Relationship to GR47/GR48 engine Dir. Pin Corresponding GR47 Signal HD15 Connector 1 O 38 2 I 42 3 O 41 TD-2 I 43 TD3 5 RD-2 O 44 RD3 6 OUT-7 O 32 O3 7 IN-4 I 39 IO9 8 OUT-8 O 40 O4 4 OUT-6 O1 9 OUT-5 O 20 DAC 10 OUT-9 O 36 O2 11 RTS-2 I 24 IO4 12 CTS-2 O 23 IO3 13 IN-5 I 37 IN1 14 15 3.
3. ELECTRICAL DESCRIPTION Audio signal descriptions are listed below: Pin Signal Dir Description 1 MICN I Microphone negative input 2 BEARN O Earpiece negative output 3 BEARP O Earpiece positive output 4 MICP I Microphone positive input MICP and MICN are balanced differential microphone input signals. These inputs are compatible with an electret microphone. BEARP and BEARN are the speaker output signals. These are differential-mode outputs.
3. ELECTRICAL DESCRIPTION 3.4 Antenna Connector The antenna connector allows transmission of radio frequency (RF) signals between the GT47 and an external customer-supplied antenna. The module is fitted with a 50 Ω, FME male coaxial jack as shown below. RF Signal GND The table below shows the antenna electrical characteristics: Parameter Limit Nominal impedance 50 Ω (SWR better than 2.
3. ELECTRICAL DESCRIPTION 3.5 SIM Card Reader The module is fitted with a SIM card reader designed for 3 V and 5 V SIM cards. It is the flip-up type which is lockable in the horizontal position and is accessed through a removable panel as shown below. The SIM card reader incorporates a SIM presence switch which detects whether a SIM card is inserted. The full operation of the GT47 relies on a SIM card being inserted.
3. ELECTRICAL DESCRIPTION 3.7 Software Updates It is possible, and sometimes necessary, to update the module software. Updates must be carried out by a Sony Ericsson approved technician. Please contact your supplier for details (see “Service and Support”, page 9).
4. EMBEDDED APPLICATIONS 4. Embedded Applications The module has the capability to store and run customer written code in the form of a script during the processors idle time, through the use of an on board interpreter. 4.1 Features Main features of embedded applications are as follows. • C based scripting language (Sony Ericsson specific) • Over the air upgrade of scripts (NOT GSM software) • Library of intrinsic functions • Multiple on radio device script support 4.
4. EMBEDDED APPLICATIONS 4.2.2 M2mpower IDE (Integrated Developers Environment) The IDE is a windows based package which allows the user to write, simulate, debug and download the application into a radio device with the embedded application (EA) software. The standard version is designed to run on Windows XP and 2000, other versions are available for 98 if required. A guide is available for implementing applications using the developers kit and the embedded application (EA) functionality.
5. TCP/IP STACK 5. TCP/IP Stack An on board IP/TCP/UDP stack has been integrated into the software negating the need for the customer to implement one in their own code base. For early software releases this is only accessible through the embedded applications (see previous section) using intrinsic functions. 5.1 Implementation The following types of commands allow various functions: • Open/closing IP connection - Negotiates/closes a dynamic IP address with the web server.
6. OPERATION 6. Operation 6.1 Switching the GT47 On The GT47 is turned ON automatically once DC power is applied. If the GT47 is turned OFF, using one of the methods described in 6.2, the control terminal can be turned ON again through one of two methods: • pull signal TO_IN to ground for t >0.2s, then release. • activate the main RS232 control line DTR, low to high for >0.2s The GT47 is fully operational after 4 seconds.
6. OPERATION 6.4 Power Save The GT47 can power down the main RS232 IC when not needed in order to minimise power consumption. The IC is powered up automatically at start-up but can be powered down by setting the output of IO2 on the embedded GR47 (pin22) to low via AT command or embedded application. Once powered down, the IC can be woken up by setting the output of IO2 high on the GR47 via AT Command. Even when powered down the IC is able to pass a DTR signal received on the serial interface.
7. TECHNICAL DATA 7. Technical Data 'DWD )HDWXUHV CSD Up to 9.6 kbps, transparent and nontransparent HSCSD (2+1) Up to 28.8 kbps GPRS Class B (4+1) - P channels - Coding schemes CS1 - CS4 85.6 kbps (subject to network support and terminal location) GSM 07.
7. TECHNICAL DATA 'DWD 6WRUDJH SMS storage capacity 40 in the module In addition, the unit can handle as many SMS as the SIM can store Phone book capacity 100 3RZHU 6XSSO\ Supply voltage range 5 - 32 V d.c. 5DGLR 6SHFLILFDWLRQV Frequency range GT47: EGSM 900 MHz and 1800 MHz (dual band) Maximum RF output power 2 W (900 MHz) and 1 W (1800 MHz) Antenna impedance 50 Ω Static sensitivity Better than –102 dBm $XGLR 6SHFLILFDWLRQV Parameter Limit Output level (differential) ≥ 4.
7. TECHNICAL DATA 6,0 &DUG 5HDGHU Voltage type Support for 3 V and 5 V SIM cards (OHFWULFDO &RQQHFWRUV DQG /(' Plug-in power supply RJ12 6-way connector and extended I/O Handset audio connector RJ9 4-way Antenna connector FME male RS232 port high density socket, 15 pin LED Green 0HFKDQLFDO 6SHFLILFDWLRQ Length 77.4 mm Width 66.4 mm Height 26.
7. TECHNICAL DATA (QYLURQPHQWDO VSHFLILFDWLRQV Operating temperature range –30 °C to +75 °C Storage temperature range –40 °C to +85 °C Relative humidity 5 - 95 %, non-condensing Stationary vibration, sinusoidal Displacement: 7.5 mm Acceleration amplitude: 20 m/s² and 40 m/s² Frequency range: 2-8 Hz, 8-200 Hz, 200-500 Hz Stationary vibration, random Acceleration spectral density (m²/s²): 0.96, 2.88, 0.
8. AT COMMAND SUMMARY 8. AT Command Summary The AT standard is a line-oriented command language. AT is an abbreviation of ATtention and it is always used to start sending a command line from the terminal equipment (TE) to the terminal adaptor (TA). The command line consists of a string of alphanumeric characters. It is sent to the GT47 to instruct it to perform the commands specified by the characters.
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9. ABBREVIATIONS AND DEFINITIONS 9.
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