GE864 Harware User Guide
Contents
1. page 26 of 27 Ee e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 16 Document Change Log Revision Date Changes ISSUE 0 29 09 06 Release First ISSUE 0 ISSUE 1 24 10 06 Added product GC864 PY C2 in the document Pag 2 Added product name and P N for 3990250686 version 3 Board to Board Connector Pinout connections updated table changed signal type and function of pin 29 and pin 30 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 27 of 272. 1 24 10 06 4 2 Turning OFF the GC864 C2 The turning off of the device can be done in three ways e by software command refer to 1vv0300745 Rev1 GC864 QUAD C2 PY C2 Software User Guide e by hardware shutdown e by Hardware Unconditional Restart When the device is shut down by software command or by hardware shutdown it issues to the network a detach request that informs the network that the device will not be reachable any more 4 2 1 Hardware shutdown To turn OFF the module GC864 C2 the ON line pin2 PL101 pin14 PL103 must be tied low for at least 2 seconds and then released The same circuitry and timing for the power on shall be used 4 2 2 Hardware Unconditional Restart The device shuts down after the release of the ON pad To unconditionally restart the module GC864 C2 the RESET line pin2 PL102 must be tied low for at least 200 milliseconds and then released The maximum current that can be drained from the RESET line is 0 15 mA A simple circuit to do it is HAAA kat V Se J Unconditional Restart KE impulse a A A VM Abt geg COND Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 11 of 27 Ee e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 NOTE don t use any pull up resistor on the RESET line nor any totem pole digital output Using pull up resistor may bring to latch up pr
3. to 1vv0300694 GE864 Hardware User Guide for more information about SIM Supply EMI EMC ESD and application notes Reproduction ToIBIGden without Telit Communications S p A written authorization All Rights Reserved page 22 of 27 4 e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 12 General Purpose I O The general purpose I O pads can be configured to act in three different ways e input e output e alternate function internally controlled The Inout pads can only be read and report the digital value high or low present on the pad at the read time The Output pads can only be written or queried and set the value of the pad output the alternate function pad is internally controlled by the GC864 C2 firmware and acts depending on the function implemented The alternate function are supported only by GPIO5 which can be configured to become a RF Transmission monitor output reflecting the RF transmission activation and GP O7 which can be configured to become a Buzzer output pin For more information about level specifications and GPIO setting please refer to 1vv0300694 GE864 Hardware User Guide and 1vv0300745 GC864 C2 Software User Guide ki Mees E Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 23 of 27 Ee e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 13 DAC and ADC section The GC
4. will be taken into account for each one of them a proper hardware solution will be suggested and eventually the wrong solutions and common errors to be avoided will be evidenced Obviously this document cannot embrace the whole hardware solutions and products that may be designed The wrong solutions to be avoided shall be considered as mandatory while the suggested hardware configurations shall not be considered mandatory instead the information given shall be used as a guide and a starting point for properly developing your product with the Telit GC864 C2 module For further hardware details that may not be explained in this document refer to the Telit GC864 C2 Product Description document where all the hardware information is reported NOTICE EN The integration of the GC864 C2 cellular module within user application shall be done according to the design rules described in this manual IT L integrazione def modulo cellulare GC864 C2 all interno dell applicazione del utente dovr rispettare le indicazioni progettuali descritte in questo manuale DE Die Integration des GC864 C2 Mobilfunk Moduls in ein Ger t mu gem der in diesem Dokument beschriebenen Konstruktionsregein erfolgen SL Integracija GC864 C2 modula v uporabni ki aplikaciji bo morala upo tevati projektna navodila opisana v tem priro niku SP La utilizaci n del modulo GC864 C2 debe ser conforme a fos usos para los cuales ha sido disefiado descritos e
5. 0kQ lt Dm op 23MVims 45 dBVim Pa 10dB car kit hands free DC bridged 2140 4 Q typical 150 4000 Hz 3 dB 1310 MVims typ open circuit 328mVrms 16 O 12dBFS SS Is 10 d e Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 19 of 27 4 e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 Ear_HF Power Buffers path e line coupling AC e line type single ended e output load resistance 2140 e internal output resistance 40 gt 1 70 e signal bandwidth 150 4000 Hz 3 dB e max single ended output voltage 656 MVims_ typ open circuit e SW volume level step 2dB e number of SW volume steps 10 10 2 Microphone Biasing The electret microphones usually needs a biasing voltage to work properly You can use the on board circuitry on external biasing network 10 2 1 On board default biasing In order to eliminate the noise coming from the power lines the microphone bias voltage is obtained from a voltage source filtered by a capacitor multiply circuit Q101 and connected through R104 R105 to MIC_MT line or R104 R106 to MIC_HF line The voltage source comes from a dedicated voltage regulator U102 supplied directly by VBATT You can use also the inner VAUX1 source in this case U102 must be removed and R112 inserted page 20 of 27 4 e Telit GC864 QUAD C2 PY
6. 7 VBATT DC voltage Power 8 GND DC voltage Power 9 VBATT DC voltage Power 10 GND DC voltage Power 11 VBATT DC voltage Power 12 GND DC voltage Power 13 NC Don t connect 14 ON_OFF DC voltage Input command for switching power ON or OFF 15 SIMVCC DC voltage External SIM Power 16 SIMIN DC voltage External SIM inside detector 17 SIMRST DC voltage External SIM Reset 18 SIMIO 3V Only External SIM Data I O 19 SIMCLK Digital Signal External SIM Clock 20 DAC OUT Digital Output Digital Analog converter output 21 TGPIO_01 Digital In Out General purpose 22 TGPIO_02 JDR Digital In Out General purpose 23 TGPIO_03 Digital In Out General purpose 24 TGPIO 04 Digital In Out General purpose 25 VRTC DC voltage VRTC Backup capacitor 26 ADC_IN1 AC input Analog Digital converter input 27 ADC_IN2 AC input Analog Digital converter input 28 ADC_IN3 AC input Analog Digital converter input 29 RESERVED 30 RESERVED 31 TGPIO_07 BUZZER Digital In Out General purpose Buzzer 32 OUT Digital Output General purpose 33 LED DC voltage Status indicator led 34 VAUX1 DC voltage Power output for external accessories 35 TGPIO_05 RFTXMON Digital In Out General purpose 36 C125 RING Digital Output Output for Ring indicator signal RI to DTE 37 C108 DTR Digital Input Input for Data terminal ready signal DTR from DTE 38 C109 DCD Digital Output Output for Data carrier detect signal DCD to DTE gt E a r Reproduction forbidden without Tel
7. 864 C2 module provides e three 11 bit Analog to Digital Converters on board CS1230 PL103 pin26 pin27 pin28 The ADCs are able to read a voltage level in the range of 0 2 volts applied on the ADC pin input store and convert it into 11 bit word e one 10 bit Digital to Analog Converter This DAC is able to generate a analogue value based a specific input in the range from 0 up to 1023 with a suitable external low pass filter For more information about level specifications the use of GPIO Pad as INPUT OUTPUT please refer to 1vv0300694 GE864 Hardware User Guide Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 24 of 27 Z e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 14 Conformity Assessment Issues The GC864 C2 module is assessed to be conform to the R amp TTE Directive as stand alone products so if the module is installed in conformance with Telit Communications SpA installation instructions require no further evaluation under Article 3 2 of the R amp TTE Directive and do not require further involvement of a R amp TTE Directive Notified Body for the final product In all other cases or if the manufacturer of the final product is in doubt then the equipment integrating the radio module must be assessed against Article 3 2 of the R amp TTE Directive In all cases assessment of the final product must be made against the Essential requi
8. C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 10 2 2 External biasing network If the microphone bias voltage is generated externally then R104 R105 R106 must not be mounted Please refer to 1vv0300694 GE864 Hardware User Guide for more information and application notes about Microphone and Earpiece Electrical Characteristics Requirements and General Design Rules 10 3 EVK2 the Evaluation Kit for Telit Modules Telit supplies the Evaluation Kit for Telit modules EVK2 to assist the designer to develop his own applications based on GC864 C2 module The EVK2 is composed by a mother board and a dedicated Telit module Interface Board on which the module is fitted it provides a fully functional solution for a complete data phone application The motherboard has multiple power supply possibilities It is equipped with SIM card housing RS 232 serial port level translator direct USB1 1 connection and two audio input output paths Please refer to 1vv0300694 GE864 Hardware User Guide and 1vv0300704 EVK2 User Guide for more information about its use audio characteristics and application notes Furthermore the EVK2 allows to benefit of the special features of the new Telit Module versions with PYTHON Script Interpreter page 21 of 27 Tel it GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 11 SIM Design Guides In all Telit modules there are five pins for SIM card holder connection Please refer
9. S e Jeli wireless solutions GC864 QUAD C2 PY C2 Hardware User Guide GC864 QUAD C2 and GC864 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 Making machines talk S J Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 This document is relating to the following products Model P N GC864 QUAD C2 3990250681 GC864 PY C2 3990250686 ae Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 2 of 27 Z e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 Contents WE e E TW cs ccea ce ncsisveacicasewensctacchazcensiaceascncesavnsasatseias uawceatsacenaseauescastheansncicceinstnianaxtineuelaeseevscaxtancuescnasass 5 2 Mechanical Dimensions estate coseiedesendeccescaesscnssasasevssies ENEE SEENEN EEN 6 3 Board to Board connector PINOUT connections ccccceeeeeeeeeeeeeeeeeeeeeeeeseneeeeeeseeeeeeeeeeeeeeeneees 7 Barware e E TE 9 41 Turning ON the GOCSGA G2 sp vassscassce pea ctacetctccsctandicccetieancdccbinwanscnceniaadcccisncecncinncsauneeameacasteesaacons 9 4 2 Turning OFF the GC864 C2 E 11 4 2 1 Hardware sbutdowmn A 11 4 2 2 Hardware Unconditional Restart 11 PWT SU UE 13 6 General Design PUER cascke csc ccescescces Sede tee ege SEENEN 14 Kaff ul RE 15 SHEENA PU E 16 9 VAUX1 power TL Tt E 17 10 A dio Section COVERY CW ege EE 18 10 1 Audio Lines Characteristics ccccccsssss
10. Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 DISCLAIMER The information contained in this document is proprietary information of Telit Communications S p A Telit Communications S p A makes every effort to ensure the quality of the information it makes available Notwithstanding the foregoing Telit Communications S p A does not make any warranty as to the information contained herein and does not accept any liability for any injury loss or damage of any kind incurred by use of or reliance upon the information Telit Communications S p A disclaims any and all responsibility for the application of the devices characterized in this document and notes that the application of the device must comply with the safety standards of the applicable country and where applicable with the relevant wiring rules Telit Communications S p A reserves the right to make modifications additions and deletions to this document at any time and without notice 2006 Telit Communications S p A hi Mees E Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 4 of 27 4 e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 1 Overview The aim of this document is the description of some hardware solutions useful for developing a product with the Telit GC864 C2 module In this document all the basic functions of a mobile phone
11. al Asynchronous Receive Transmit e microcontroller UART 5V or other voltages different from 2 8V For more information about Serial port levels signals and connections pinout and level translation please refer to 7vv0300694 GE864 Hardware User Guide Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 16 of 27 S e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 9 VAUX1 power output A regulated power supply output is provided in order to supply small devices from module This output is active when the module is ON and goes off when module is shut down For more information about VAUX1 source please refer to 17vv0300694 GE864 Hardware User Guide page 17 of 27 Reproduction ToIBIGden without Telit Communications S p A written authorization All Rights Reserved 4 e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 10 Audio Section Overview The Base Band Chip of the GC864 C2 Telit Module provides two different audio blocks both in transmit Uplink and in receive Downlink direction as shown in the see picture below MT lines should be used for handset function HF lines is suited for hands free function car kit These two blocks can be active only one at a time selectable by AXE HW line or by dedicated AT command Keep in mind that MT lines work as Differential Input Output cir
12. atic discharges may damage the product itself Same cautions have to be taken for the SIM checking carefully the instruction for its use Do not insert or remove the SIM when the product is in power saving mode The system integrator is responsible of the functioning of the final product therefore care has to be taken to the external components of the module as well as of any project or installation issue because the risk of disturbing the GSM network or external devices or having impact on the security Should there be any doubt please refer to the technical documentation and the regulations in force Every module has to be equipped with a proper antenna with specific characteristics The antenna has to be installed with care in order to avoid any interference with other electronic devices and has to guarantee a minimum distance from the body 20 cm In case of this requirement cannot be satisfied the system integrator has to assess the final product against the SAR regulation The European Community provides some Directives for the electronic equipments introduced on the market All the relevant information s are available on the European Community website http europa eu int comm enterprise rtte dir99 5 htm The text of the Directive 99 05 regarding telecommunication equipments is available while the applicable Directives Low Voltage and EMC are available at http europa eu int comm enterprise electr_equipment index en htm
13. cuits while HF lines work as Single Ended Input Output circuits For these reasons they have also different audio characteristics Differential Line Out Drivers Fully Differential Power Buffers E GOLD Lite Audio Paths 45dBV Pa E E ZS B T Le K Reproduction forbidden without Telit Communications S p A written authorization All Rights emm page of 27 Z e Telit GC864 QUAD C2 PY C2 Hardware User Guide 10 1 Audio Lines Characteristics 1vv0300744 Rev 1 24 10 06 10 1 1 Microphone Paths Characteristic Mic_MT 1 differential microphone path line coupling line type coupling capacitor differential input resistance differential input voltage microphone nominal sensitivity analog gain suggested echo canceller type Mic_HF 2 single ended microphone path line coupling line type coupling capacitor differential input resistance differential input voltage microphone nominal sensitivity analog gain suggested echo canceller type 10 1 2 Ear Paths Characteristics Ear_MT Differential Line out Drivers Path line coupling line type output load resistance internal output resistance signal bandwidth max differential output voltage differential output voltage SW volume level step number of SW volume steps AC balanced gt 100nF 50kQ lt 1 03V pp 365MV ims 45 dBV ms Pa 20dB handset AC single ended 2 100nF 5
14. it Communications S p A written authorization All Rights Reserved page 7 of 27 CO Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved C105 RTS C106 CTS C103 TXD C104 RXD NC NC RX_Trace TX_Trace MIC_MT DEC MIC_MT DEC EAR_MT EAR_MT EAR_HF DEC MIC_HF DEC ANALOG GND Digital Input Digital Output Digital Input Digital Output Don t connect Don t connect Digital Input Digital Output Audio Input Audio Input Audio Output Audio Output Audio Output Audio Input AC voltage Z e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 Input for Request to send signal RTS from DTE Output for Clear to send signal CTS to DTE Serial data input TXD from DTE Serial data output to DTE RX Data for debug monitor TX Data for debug monitor RESERVED RESERVED RESERVED RESERVED RESERVED RESERVED Handset microphone signal input phase Handset microphone signal input phase Handset earphone signal output phase Handset earphone signal output phase Handsfree ear output phase RESERVED Handsfree microphone input phase For more information about balls position and pinout of GE864 module please refer to 1vv0300694 GE 864 Hardware User Guide page 8 of 27 Ee e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 4 Hardware Commands 4 1 Turning ON the GC864 C2 To t
15. mobile operating configurations e Users and installers must be provided with antenna installation instructions and transmitter operating conditions for satisfying RF exposure compliance Manufacturers of mobile fixed or portable devices incorporating this module are advised to clarify any regulatory questions and to have their complete product tested and approved for FCC compliance page 25 of 27 Z e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 15 SAFETY RECOMMANDATIONS READ CAREFULLY Be sure the use of this product is allowed in the country and in the environment required The use of this product may be dangerous and has to be avoided in the following areas CL Where it can interfere with other electronic devices in environments such as hospitals airports aircrafts etc Q Where there is risk of explosion such as gasoline stations oil refineries etc It is responsibility of the user to enforce the country regulation and the specific environment regulation Do not disassemble the product any mark of tampering will compromise the warranty validity We recommend following the instructions of the hardware user guides for a correct wiring of the product The product has to be supplied with a stabilized voltage source and the wiring has to be conforming to the security and fire prevention regulations The product has to be handled with care avoiding any contact with the pins because electrost
16. n este manual del usuario FR L int gration du module cellulaire GC864 C2 dans l application de l utilisateur sera faite selon les r gles de conception d crites dans ce manuel HE bon onan Sw PVN TYTN CH Ton MUNAA NPTT DR DV WEE IERT gn DY GC864 C2 The information presented in this document is believed to be accurate and reliable However no responsibility is assumed by Telit Communication S p A for its use nor any infringement of patents or other rights of third parties which may result from its use No license is granted by implication or otherwise under any patent rights of Telit Communication S p A other than for circuitry embodied in Telit products This document is subject to change without notice page 5 of 27 Ee e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 2 Mechanical Dimensions The Telit GC864 C2 module overall dimension are e Length 50 mm e Width 33 mm e Thickness 5 6 mm 33mm GE864 QUAD 50mm 5 fmm e Weight 14gr page 6 of 27 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved Z e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 3 Board to Board connector PINOUT connections Pin Signal Type Function 1 VBATT DC voltage Power 2 GND DC voltage Power 3 VBATT DC voltage Power 4 GND DC voltage Power 5 VBATT DC voltage Power 6 GND DC voltage Power
17. oblems on the GC864 C2 power regulator and improper functioning of the module The RESET line must be connected only in open collector configuration TIP The unconditional hardware Restart should be always implemented on the boards and software should use it as an emergency exit procedure For example 1 Let s assume you need to drive the RESET line with a totem pole output of a 3 5 V microcontroller uP_OUT2 gt RESET et Se ES HE SE a 1F5 375 Me QO Wo Lee Reset Signal Operating levels Signal Min Max RESET Inputhigh 2 2V 3 3V RESET Input low OV 0 2V this signal is internally pulled up so the pin can be left floating if not used e d pm Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 12 of 27 S e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 5 Power Supply The power supply circuitry and board layout are a very important part in the full product design and they strongly reflect on the product overall performances hence read carefully the requirements and the guidelines that will follow for a proper design For more information please refer to 7vv0300694 GE864 Hardware User Guide Reproduction ToIBIGden without Telit Communications S p A written authorization All Rights Reserved page 13 of 27 S e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1
18. rements of the R amp TTE Directive Articles 3 1 a and b safety and EMC respectively and any relevant Article 3 3 requirements The GC864 C2 module is conform with the following European Union Directives e R amp TTE Directive 1999 5 EC Radio Equipment amp Telecommunications Terminal Equipments e Low Voltage Directive 73 23 EEC and product safety e Directive 89 336 EEC for conformity for EMC In order to satisfy the essential requisite of the R amp TTE 99 5 EC directive the GC864 C2 module is compliant with the following standards e GSM Radio Spectrum Standard EN 301 511 and 3GPP 51 010 1 e EMC Electromagnetic Compatibility Standards EN 301 489 1 and EN 301 489 7 e LVD Low Voltage Directive Standards EN 60 950 In the Hardware User Guide and Software User Guide all the information you may need for developing a product meeting the R amp TTE Directive is included The GC864 C2 module is conform with the following US Directives e Use of RF Spectrum Standards FCC 47 Part 24 GSM 1900 e EMC Electromagnetic Compatibility Standards FCC47 Part 15 To meet the FCC s RF exposure rules and regulations e The system antenna s used for this transmitter must be installed to provide a separation distance of at least 20 cm from all the persons and must not be co located or operating in conjunction with any other antenna or transmitter e The system antenna s used for this module must not exceed 3 dBi for mobile and fixed or
19. sssssssereessssneenensceessssesenensnneneesessesenseneanaeeeeeeesenanas 19 10 1 1 Microphone Paths Charachertsiic ttrt nnnnnnst tenn Ennan nennen 19 10 1 2 Ear Paths Characteristics AA 19 10 2 Microph n f Te ss isisisisiinisidaisonsi in tt eso n gt st tsi st ne nitty inte ia daisi aad hens sy enter eer Ee pinsin aera 20 10 2 1 On board default biasing ceccceceeeeceeeecenececeaeeeeneeeeeeeeseaeeeeaaeseeeesaeeeesaaeseeeeessaeeeseaeeseeeseseeseas 20 10 2 2 External biasing NEtWOFk 00 0 eee eee eeee rete ene e ee te ee unnt ttuan teenage eeeeeaaeeeeeeaaeeeeeeaaeeeeeeaeeeeseareeeeeaas 21 10 3 EVK2 the Evaluation Kit for Telit Modules 0 ccccecseeeeeeeeeeeeeseneeneeeeeeeeneeeeeseeeeeeeeeas 21 11 SIM Deelen G id s savisceecesicceesessetensasieceiasseanecevacenessennene senuatenicasnnsessetavansenenisusnececneraclasanteaneneexsccens 22 12 General P rpose WO siscsisn cases cnteccstenceisee ecticcate sl ceana tentacle eneeeedne ts acswnasisenncecinearencanannanetanaacedes 23 13 DAC and ADC SOC E 24 14 Conformity Assessment ISSUES eceeseeeeeeeeeeeeeeeeeneeeneeeeesseeeeeeseseeneeseseneeeeseeneeeseeeeeaeeeensees 25 15 SAFETY RECOMMANDAT IONS ccscssssssseceseseensennensceeeeeeesnsnseesneeeesessnsaseqeeneeoessseseenenenonaeses 26 16 Document Change Log sds octet cee 27 CO Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 3 of 27 4 e
20. urn on the GC864 C2 the ON line must be tied low for at least 1 second and then released The maximum current that can be drained from the ON line is 0 1 mA A simple circuit to do it is ON gt RI P Power ON impulse KA K AN CH R2 aa ESCH NOTE don t use any pull up resistor on the ON line it is internally pulled up Using pull up resistor may bring to latch up problems on the GC864 C2 power regulator and improper power on off of the module The ON line must be connected only in open collector configuration NOTE In this document all the lines that are inverted hence have active low signals are labeled with a name that O ends with a or with a bar over the name Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 9 of 27 Z J Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 For example 1 Let s assume you need to drive the ON line with a totem pole output of a 3 5 V microcontroller uP_OUT1 ON b i i Q2 up Ou BC847BW SOT 323 Fs dE Vink ove JL Is Power ON OFF ingulse GND 2 Let s assume you need to drive directly the ON line inserting the forecast ON OFF button PL101 GND Reproduction forbidden without Telit Communications S p A written authorization All Rights h page 10 of 27 le lit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev
21. vv0300744 Rev 1 24 10 06 6 General Design Rules The principal guidelines for the Power Supply Design embrace three different design steps electrical design thermal design PCB layout For more information about Electrical Design Thermal Design Power Supply PCB layout please refer to 1vv0300694 GE864 Hardware User Guide Reproduction ToIBIGden without Telit Communications S p A written authorization All Rights Reserved page 14 of 27 S e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 Z Antenna The antenna connection and board layout design are the most important part in the full product design and they strongly reflect on the product overall performances hence read carefully and follow the requirements and the guidelines for a proper design For more information about GSM Antenna Requirements PCB line and Installation Guidelines please refer to 1vv0300694 GE864 Hardware User Guide Reproduction ToIBIGden without Telit Communications S p A written authorization All Rights Reserved page 15 of 27 Ee e Telit GC864 QUAD C2 PY C2 Hardware User Guide 1vv0300744 Rev 1 24 10 06 8 Serial Port The serial port on the Telit GC864 C2 is the core of the interface between the module and OEM hardware Several configurations can be designed for the serial port on the OEM hardware but the most common are e RS232 PC com port e microcontroller UART 2 8V 3V Univers
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