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radiometrix ltd GTC01 page 1 features supports cinterion mc75i, tc65i, or tc63i gsm modul es java platform using tc65i worldwide communication potential programmable watchdog function sim holder rs232 compliant serial interfaces on-board supply regulation dil module form factor applications gsm communications interface for any product remote management and instrumentation remote imaging emails sms tcp/ip remote web-site GTC01 is a self contained gsm / gprs platform supporting the cinterion m2m evolution range of gsm modems. GTC01 includes a watchdog, sim holder and user interfaces. it can be directly added to any application requiring gsm connectivity. figure 1: GTC01 gsm telemetry controller hartcran house, 231 kenton lane, harrow, midd lesex, ha3 8rp, england tel: +44 (0) 20 8909 9595, fax: +44 (0) 20 8909 223 3, www.radiometrix.com issue 2, 18 november 2010 gt c01 preliminary
radiometrix ltd GTC01 page 2 general description GTC01 is a complete gsm / gprs modem communications processor solution in an easy to use plug-in module form factor. essential references for the d eveloper are the hardware and software documents fo r the gsm module to be used. useful third-party document s and the contact details for cinterion are listed at the end of this datasheet under references . this document: 1. states the physical dimensions and pin-arrangeme nt 2. details the hardware connection of the cinterion gsm device 3. specifies the power supply requirements 4. describes how the watchdog controller is typical ly used in a system figures 2 and 3 illustrate the outline shape and ph ysical connections to the GTC01 pcb. the antenna connection is 50 ohms impedance and is via a hirose u.fl connection directly to the gsm un it rather than to the gtc board. typically the part n umber of the connector will be u.fl-lp-0xx, where xx varies according to the type of coaxial cable used. extremely thin cable is commonly used (1.2 C 1.4m m diameter) and as both the connectors and cable requ ire specialist tools it is often convenient to sour ce a pre- assembled loom or loom and antenna combined. it is easier to connect the rf loom to the gsm unit before mating the gsm unit to the rest of the modu le since the rf connection becomes inverted once the g sm unit is installed. the very small size of u.fl connectors means that care must be taken when handl ing the rf connection. figure 2: GTC01 dimensions C end view 45.72mm 50.80mm 7mm allow approx. 18mm height on the target application 0.64mm dia. sq. pins
radiometrix ltd GTC01 page 3 figure 3: GTC01 dimensions C plan view 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 64 63 62 61 60 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 56 57 58 59 gsm modem sim 83.82mm 64 pins 2.54mm pitch antenna connection (underside of gsm modem)
radiometrix ltd GTC01 page 4 GTC01 pin description pin name gsm unit pin no. or pic pin descriptor function and notes - where gsm is referenced please refer to the hardware interface description document pertaining to the gsm unit installed 1 enable enables the on-board regulator when taken high. typically this pin is tied to one of the +v supply pins. 2 asc0-ri rs232 ring indicator output from gsm asc 0 3 asc0-dsr rs232 data set ready output from gsm as c0 4 asc0-cts rs232 clear to send output from gsm asc 0 5 asc0-rts rs232 request to send input to gsm asc0 6 asc0-dtr rs232 data terminal ready input to gsm asc0 7 asc0-dcd rs232 data carrier detect output from g sm asc0 8 asc0-td rs232 data input to gsm asc0 9 asc0-rd rs232 data output from gsm asc0 10 spidi gsm: 7 gsm spi digital input 11 gpio8 gsm: 6 gsm general purpose input/output 12 gpio10 gsm: 5 gsm general purpose input/output a nd pulse counter 13 adc2_in gsm: 3 gsm analogue to digital conversio n input. +2.4v fs. do not drive beyond 0.3v when gsm unit is shut down . 14 adc1_in gsm: 2 gsm analogue to digital conversio n input. +2.4v fs. do not drive beyond 0.3v when gsm unit is shut down 15 +v supply 16 +v supply +5.00 to +13.8v supply to the module: typically 6v C see specifications for more information connected to pins 15, 16, 47, 48 17 gnd 18 gnd gsm: 1, 4, 36-40, 80 pic: vss ground (0v) of the module connected to pins 17, 18, 33, 49, 50 19 dac_out gsm: 79 gsm pulse-width modulator output (use an external filter to achieve an analogue outp ut) 20 gpio9 gsm: 76 gsm general purpose input/output 21 spics gsm: 75 gsm spi chip select (output) 22 gpio4 gsm: 74 gsm general purpose input/output 23 gpio3 gsm: 73 gsm general purpose input/output 24 gpio7 gsm: 8 gsm general purpose input/output 25 gpio6 gsm: 9 gsm general purpose input/output 26 gpio5 gsm: 10 gsm general purpose input/output 27 i2cclk_spiclk gsm: 11 gsm i2c or spi clock outpu t 28 dai5 gsm: 13 gsm: pcm audio input C 100k pull-do wn on board 29 i2cdat_spido gsm: 70 gsm: i2c data in/out or spi data output 30 vmic gsm: 66 gsm: external microphone supply 2.5 v output, 2ma max current capability. 31 epn2 gsm: 65 gsm: external speaker connection (3 2 ohm) 32 epp2 gsm: 64 gsm: external speaker connection (3 2 ohm) 33 gnd connected to pins 17, 18, 33, 49, 50 34 dai4 gsm: 22 gsm: pcm audio input C 100k pull-do wn on board 35 dai3 gsm: 23 gsm: pcm audio output 36 epp1 gsm: 63 gsm: external speaker connection (8 ohm) 37 epn1 gsm: 62 gsm: external speaker connection (8 ohm) 38 micp1 gsm: 59 gsm: external microphone input 39 micn1 gsm: 58 gsm: external microphone input 40 agnd gsm: 57 gsm: analogue ground 41 dai2 gsm: 24 gsm: pcm audio output 42 dai1 gsm: 25 gsm: pcm audio input C 100k pull-do wn on board 43 dai0 gsm: 26 gsm: pcm audio output 44 sync gsm: 28 gsm: synchronization signal C usefu l indicator for monitoring gsm activity (500ua max output)
radiometrix ltd GTC01 page 5 45 vrtc gsm real time clock backup supply input: c onnected to vddlp (gsm: 33) via a schottky diode C the diode ma y be bypassed with a solder link in order to use a capac itor as the rtc backup supply but should be left untouched when using a battery. vin: 2.7v - 3.6v (max) 46 asc1-cts rs232 clear to send output from gsm as c1 47 +v supply 48 +v supply connected to pins 15, 16, 47, 48 49 gnd 50 gnd connected to pins 17, 18, 33, 49, 50 51 asc1-td rs232 data input to gsm asc1 52 asc1-rts rs232 request to send input to gsm asc 1 53 asc1-rd rs232 data output from gsm asc1 54 asc0-shdn pic: rb4 output: goes high to indicate that asc0 rs232 traffic is inhibited: if the pic is required to make a call fo r some reason it needs to take over the asc0 interface to the gsm unit. it achieves this by making the on-board rs232 drive rs for asc0 high impedance. 55 pic-rb5 pic: rb5 pic general purpose input / out put 56 pic-pgc pic: rb6 pic general purpose input / out put C also used for in-circuit serial programming (icsp) of the pic 57 pic-pgd pic: rb7 pic general purpose input / out put C also used for icsp 58 pic-vdd-2v7 pic: vdd pic +v supply: supplied fr om the on-board +3v regulator via a schottky diode. this can be used as a general lo w current supply (<50ma). example: connect to pull-up resist ors for use with gsm gpio inputs. 59 pic-ra0 pic: ra0/an0 pic general purpose input / output 60 pic-ra1 pic: ra1/an1 pic general purpose input / output 61 on-off pic: rb0/int pic general purpose input / output but suggested us e is to provide an on/off input function for the gsm unit. 62 pic-ra2 pic: ra2/an2 pic general purpose input / output 63 pwr_ind gsm: 78 pic: ra3 pwr_ind (power indicator): the gsm unit on/off stat us C open collector pulled up via 10k to pic-vdd-2v7 so logic 0 indicates that the gsm unit is on. 64 pic-vpp pic: /mclr pic /mclr is pulled up via 10 k to pic-vdd-2v7. this pin is used during icsp. holding low will keep the pic in reset. notes on the module pin description table not all of the gsm pins are brought out and some of the pic pins are similarly unavailable. please refer to the next table for a description of the on-board pe rmanent connections between the pic watchdog and th e gsm unit. the pic will normally be programmed C ev en if its only function is to turn the gsm unit on or off. in all cases of interfacing peripherals to the gsm device please refer to the relevant hardware descri ption documents for the type of gsm device being used. caution! take care that inputs to gsm gpio lines never excee d 3.00v C it is recommended to use the pic-vdd-2v7 (pin 58) as a logic 1 reference for all digital inputs to the GTC01. standard rs232 bus t ransceivers can be used for serial interfacing. analogue inputs to th e gsm unit should not be present whilst the unit is shut down (pwr_ind = high) and should not exceed 2.4v in any case.
radiometrix ltd GTC01 page 6 pic watchdog the on-board 16lf628a pic is able to provide suppor t for the GTC01 in the following ways: ? control of igt and emerg_off on the gsm unit C turn gsm unit on/off ? initiate software shutdown (e.g. of a java applicat ion) via gpio ? at commands via the asc0 interface (e.g. make calls ) ? inform peripheral devices of GTC01 status pic pin description is given in the table below C p re-determined functions are highlighted: gtc pin pic name gsm unit pin no. function and notes 59 ra0/an0 digital i/o or analogue input 60 ra1/an1 digital i/o or analogue input 62 ra2/an2/vref digital i/o or analogue input 63 ra3 78 pwr_ind (power indicator C input to the pic): the g sm unit on/off status is open collector pulled up via 100k to pic- vdd-2v7, so logic 0 indicates that the gsm unit is on. ra4 71 connected directly to gpio1 on the gsm unit, ra4 is an open- drain pulled up via 10k to pic-vdd-2v7. intended f or use as a control output from the pic to the gsm unit. 64 /mclr /vpp pic /mclr is pulled up via 10k to pi c-vdd-2v7. this pin is used during icsp . pull low to reset. ra6 (56) connected to gsm igt (pin 56) via a transistor (ope n collector). this is able to turn the gsm unit on/off. ra7 (55) connected to gsm emerg_off (pin 55) via a transisto r (open collector). this is able to turn the gsm unit off. 58 vdd pic-vdd-2v7: supply to the pic is from the +3v supply on-board the GTC01 via schottky diode. note that the +3v su pply is not available externally but the pic supply can be used as a general- purpose low-current source for interfacing with the rest of the module. this pin can be driven to +5v during icsp (whilst main module supply is disconnected). 17 18 33 49 50 vss connected to the gnd (0v) pins of GTC01. also used during icsp . 61 rb0/int intended for use as the on/off request user input. normally pulled high within the pic by software (port b wea k pull-up should be enabled in the program code). rb1/rx 30 connected to rxd0 on the gsm unit: serial data fro m gsm unit to pic using asc0. never make rb1 an output. rb2/tx 32 connected to txd0 on the gsm unit: serial data from pic to gsm unit using asc0. note that the pic program should ensure that that rb2 is always configured as an input and that the txen bit of the txsta register is 0 whenever rb4 is low (i.e. when asc0 is available for external use). rb3 72 connected directly to gpio2 on the gsm unit, rb3 is intended for use as a status / response signal input from the gs m unit. use port b weak pull-up enable. 54 rb4 asc0-shdn: set high to inhibit external asc0 rs232 traffic: if the pic is required to communicate serially with the gs m unit it should have control over the asc0 interface. this is achi eved by making the GTC01 rs232 drivers for asc0 high impedance (tr i-state). rb4 should always be configured as an output in the pic program and driven low or high as required by the applicati on. 55 rb5 digital i/o. see notes for a suggested use of rb5. 56 rb6/pgc pic-pgc: general purpose input/output. also used as programming clock during icsp of the pic. 57 rb7/pgd pic-pgd: general purpose input/output. also used as the data input during icsp of the pic.
radiometrix ltd GTC01 page 7 pic watchdog notes the on-board pic uses the 4mhz oscillator contained within the pic. the on-board pic of the GTC01 as supplied will cont ain a short program allowing a gsm unit to be turne d on/off. when power is first applied (en = high) th e pic will attempt to start the gsm unit via the ig t line. after this, taking the gtc on/off pin low for appro x. 500ms will cause the pic to attempt switching th e gsm unit off using the igt line C the success of th is action will depend upon how the gsm unit is set- up. taking the on/off pin low for >2s then releasing it will cause the pic to force the gsm unit off via t he emerg_off line. if the gsm unit is turned off it can be turned on a gain by taking the on/off pin low for approx. 500ms , causing the pic activate the igt line again. because the pic has direct control over the gsm uni t it is also possible to write applications for the pic and use the gsm unit as a straightforward modem. howev er as the gsm device contains a far more powerful processor (32-bit) and has more resources and capab ilities it is anticipated that the pic will normall y be used in a supporting role with some useful additional i/ o capability. note: if the gsm unit were set to auto-start then i t would be possible to operate the gsm unit with no program contained within the pic. the watchdog fun ction may be temporarily disabled by taking pin 64 low. a pic watchdog example the application within the gsm unit would regularly signal its status via gpio2 (active low). short a ctivation of gpio2 could refresh a watchdog timer. long acti vation could signal a request to the pic to make a standard telephone call using asc0 (for example: to maintain the network acceptance of a payg sim in a n application that rarely uses a gsm connection e.g. alarms). the pic is able to restart a hung application, ha ving control of both igt and emerg_off lines. it c ould also request an action of the gsm unit via gpio1 C e.g. halt a java application. recommended use of rb5 in using cinterion modules it has been found that d uring startup-shutdown momentary logic 1 outputs can appear on some of the gpio lines. this behaviour c ould be a problem in some situations. therefore th e pic on GTC01 could be programmed so that rb5 is a cinterion_invalid indication that is high whenever pwr_ind is high but is also held high duri ng initialisation (e.g. up to 1s post igt) and driv en high just before driving ra6 igt or ra7 emerg_off. pic programming the pic may be programmed using a suitable in-circu it programming device. a microchip tm programmer is recommended. note that both the low-voltage progra mming enable bit (lvp) and the brown-out reset enable bit (boren) of the configuration word should be disabled (set to 0). oscillator selection bi ts (fosc<2:0>) should be set to 100 corresponding to selection of the internal oscillator with ra6 and ra7 available for use as general purpose i/o. caution! due to the possibility for damage to be done to the gsm unit whilst in-circuit programming the pic dev ice with an external supply radiometrix does not recomm end in-circuit programming of the pic with a gsm un it fitted to the board. in-circuit programming can be achieved using the gt c01 on-board pic supply (pic-vdd-2v7) but if code protection is enabled in the configuration word you may find that re-programming cannot be achieved wi thout an external +5v supply to the pic. for this reason it is recommended not to enable code protection du ring development of pic programs for GTC01. if it is ne cessary to program the pic using an external supply please bear in mind that several pic port pins are connected directly to gsm i/o pins. either disconn ect the power supply or inhibit the supply by connecting pi n 1 to 0v. when programming with a +5v supply the in-circuit p rogramming device default configuration should be s et to hold the pic in reset whilst connected, so that the pic program is never run whilst the +5v supply is connected. with the main module supply either disc onnected or inhibited as described above, the pic m ay be programmed with a +5v supply connected to pin 58 .
radiometrix ltd GTC01 page 8 operating specifications compatible gsm units: cinterion mc75i, tc65i an d tc63i operating temperature 1 -25 c to +65 c storage temperature -40 c to +85 c dc supply (pins 15, 16, 47, 48) 2 +5.00v to +13.8v supply current (typical quiescent C gsm pa not active) 30 C 40ma (typical average allowance during gprs activity) 3 600ma enable pin (enables module supply) 4 +1v to 13.8v (0v = module off) digital i/o logic 1 level 5 +2.5v to +2.9v analogue inputs (gsm) 6 +2.4v max. analogue inputs (pic) (up to) pic vdd maximum data rate for serial interfaces 230400 bp s notes : 1) gsm devices can become hot during periods of gsm activity. when intending to use in applications involving long periods of gsm data transfer conside ration should be given to extra heat-sinking of the gsm unit and / or extra ventilation. please refer to t he gsm device datasheet. 2) 5.00v is the absolute minimum and is measured at the supply pins of the module C no dip from this voltage is permissible during use. because of the relatively high peak currents involved careful consideration should be given to the supply. it is recommended to use all the supply pins. with regard to higher supply voltages 13.8v is a no minal figure and the on-board regulator will handle up to 20v for very short periods of gsm activity but when used in an application requiring long periods of g sm activity the supply voltage should be maintained at approx. 5.5v maximum otherwise the module may overheat and will shut down. however, many applica tions use gsm for short periods only. in electrically noisy environments it is recommende d to use transient voltage suppression (e.g. tvs cl amp diode). the module is not reverse polarity protected. 3) for specific supply currents pertaining to the g sm device being used please refer to the datasheet of the device. peak current during gsm activity can excee d 2a. therefore a generic 5v 1a supply is not suff icient, whereas a 6v 1a supply with a 10,000uf bulk storage capacitor would be acceptable. wide pcb traces to the module supply pins are recommended. 4) enable is a logic-level input to a switch for th e main power supply: do not apply voltages between +0.2v and +1v to the enable pin as this may result in dam age to the module. the upper value of 13.8v is a nominal figure (see note 2 above). 5) +3.00v is the absolute maximum. no voltage shou ld be present with the gsm device (or pic) un- powered. please refer to the datasheet for the gsm unit to be used. 6) make sure that no analogue input is present when the gsm unit is shutdown. mic inputs should not b e present when vmic is not enabled. please refer to the gsm datasheet.
radiometrix ltd GTC01 page 9 installing a gsm modem there are three options when attaching a gsm unit t o GTC01: ? plastic clip ? soldered pillars (threaded) and screws ? plain spacers with screws, washers and nuts whichever method is chosen a 4mm stack height is re quired. when using pillars / spacers note that the gsm unit uses a three-point mounting. please state your preferred choice of fitting kit when ordering or use the part numbers and supplier references given belo w. plastic clip manufacturer: gtt europe website: http://www.gtteurope.co.uk/ http://www.gtteurope.co.uk/cinterionwirelessmodule/ integrationclips.php distribution: farnell manufacturer part: gt-mc75i-clip-f a datasheet is available illustrating how to use th e mounting clip. solderable pillar and locking screw manufacturer: gtt europe website: http://www.gtteurope.co.uk/ http://www.gtteurope.co.uk/cinterionwirelessmodule/ pillars.php distribution: farnell manufacturer part: r-15-0075-f (pillar) r-14-0067-f (screw) plain spacer manufacturer: richco international co ltd website: http://www.richco-inc.com/ part number: rrsb-2240-04 note that m2 x 10mm screws with nuts and washers ar e also required when using plain spacers. ordering information radiometrix part number: GTC01 gsm modems can be supplied with the GTC01. please ask for details. to start using gsm a sim card is also required (not supplied by radiometrix). carrier boards the GTC01 can be evaluated on common 0.1 stripboar d or incorporated straight into the design of the customer but radiometrix also offer a complete syst em with ready-to use interfaces etc. there are two types available: gtc-dev offers a ready to use development and evaluation pl atform: the gtc-dev has a power supply socket, db9 serial connectors, usb - uart bridge, dip switch, b uttons, leds and icsp connectors. all GTC01 connections are made available via breakout through -hole solder pads. additionally, a nbek style rf module carrier board can be fitted. this board can also be supplied in a bare bones configuration w here only the power supply connection and GTC01 socket i s fitted. gtc-app aimed at a light industrial / control environment: screw terminal connections for serial data interfac es, relay outputs, isolated digital inputs and analogue input s. as with gtc-dev there is breakout connection vi a through-hole solder pads for all of the GTC01 pins.
radiometrix ltd GTC01 page 10 references for cinterion gsm products: cinterion wireless modules gmbh st.-martin-str. 53 81669 munich germany switchboard: +49 89 21029 9000 web: http://www.cinterion.com/ http://www.cinterion.com/m2m-evolution.html documentation (the documents listed here are not ne cessarily the latest versions): tc63i tc63i hardware interface description: tc63i_hd_v01. 100a tc63i at command set: tc63i_atc_v01.100 tc65i tc65i hardware interface description: tc65i_hd_v01. 100b tc65i at command set: tc65i_atc_v01.000 java users guide: wm_java_usersguide_v14 mc75i mc75i hardware interface description: mc75i_hd_v01. 100a mc75i at command set: mc75i_atc_v01.100 pic16lf628a pic16f627a/628a/648a data sheet: ds40044g
radiometrix ltd hartcran house 231 kenton lane harrow, middlesex ha3 8rp england tel: +44 (0) 20 8909 9595 fax: +44 (0) 20 8909 2233 sales@radiometrix.com www.radiometrix.com copyright notice this product data sheet is the original work and co pyrighted property of radiometrix ltd. reproduction in whole or in part must give clear acknowledgement to the copyright owner. limitation of liability the information furnished by radiometrix ltd is bel ieved to be accurate and reliable. radiometrix ltd reserves the right to make changes or improvements in the design, specification or manufacture of its subassembly products without notice. radiometrix lt d does not assume any liability arising from the application or use of any product or circuit descri bed herein, nor for any infringements of patents or other rights of third parties which may result from the u se of its products. this data sheet neither states nor implies warranty of any kind, including fitness for any particular application. these radio devices ma y be subject to radio interference and may not function as intended if interference is present. we do not recommend their use for life critical applications. the intrastat commodity code for all our modules is : 8542 6000 r&tte directive after 7 april 2001 the manufacturer can only place finished product on the market under the provisions of the r&tte directive. equipment within the scope of the r&tte directive may demonstrate compliance to the essential requirements specified in article 3 of the directive, as appropriate to the particula r equipment. further details are available on the office of comm unications (ofcom) web site: http://www.ofcom.org.uk/ information requests ofcom riverside house 2a southwark bridge road london se1 9ha tel: +44 (0)300 123 3333 or 020 7981 3040 fax: +44 (0)20 7981 3333 information.requests@ofcom.org.uk european communications office (eco) peblingehus nansensgade 19 dk 1366 copenhagen tel. +45 33896300 fax +45 33896330 ero@ero.dk www.ero.dk

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