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Telit Wireless Solutions GE910, Руководство пользователя по оборудованию

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Telit Wireless Solutions GE910 Скачать руководство пользователя страница 33

 
 
 
 

 

GE9

GE9

GE9

GE910 Hardware User Guide

10 Hardware User Guide

10 Hardware User Guide

10 Hardware User Guide    

1vv0300962 Rev.4 2012-06-25   

 

Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved 

 

page 33 of 73 

Mod. 0805 2011-07 Rev.2

 

6.

 

Antenna 

The  antenna  connection  and  board  layout  design  are  the  most  important  aspect  in  the  full 
product  design  as  they  strongly  affect  the  product  overall  performances,  hence  read  carefully 
and follow the requirements and the guidelines for a proper design. 

6.1.

 

 GSM Antenna Requirements 

As suggested on the Product Description the antenna and antenna transmission line on PCB for a 
Telit GE910 device shall fulfill the following requirements:  

 

ANTENNA REQUIREMENTS 

Frequency range 

Depending by frequency band(s) provided by the network 
operator, the customer shall use the most suitable antenna 
for that/those band(s) 

Bandwidth 

70 MHz in GSM850, 80 MHz in GSM900,    170 MHz in 
DCS & 140 MHz PCS band 

Gain 

1.4dBi @900 and 3dBi @1800 
1.4dBi @850 and 3dBi @1900 

Impedance 

50

Ω

 

Input power 

> 2 W  

VSWR absolute max 

≤

  10:1 (limit to avoid permanent damage) 

VSWR recommended 

≤

   2:1 (limit to fulfil all regulatory requirements) 

 
When using the GE910, since there's no antenna connector on the module, the antenna must be 
connected  to  the  GE910  antenna  pad  (LGA  pad  K1)  by  means  of  a  transmission  line 
implemented on the PCB. 
 
In the case the antenna is  not directly connected at the antenna pad of the GE910, then a PCB 
line is needed in order to connect with it or with its connector.  
 
 
This transmission line shall fulfill the following requirements: 
 

ANTENNA LINE ON PCB REQUIREMENTS 

Characteristic Impedance 

50

Ω

 

Max Attenuation 

0,3 dB 

Coupling with other signals shall be avoided 
Cold End (Ground Plane) of antenna shall be equipotential to the 
GE910 ground pins 

 

Содержание GE910

Страница 1: ...GE910 Hardware User Guide 1vv0300962 Rev 4 2012 06 25...

Страница 2: ...0962 Rev 4 2012 06 25 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 2 of 73 Mod 0805 2011 07 Rev 2 APPLICABILITY TABLE APPLICABILITY TABLE AP...

Страница 3: ...dia Laws in the Italy and other countries preserve for Telit and its licensors certain exclusive rights for copyrighted material including the exclusive right to copy reproduce in any form distribute...

Страница 4: ...ted transcribed stored in a retrieval system or translated into any language or computer language in any form or by any means without prior written permission of Telit High Risk Materials Components u...

Страница 5: ...HW Unconditional Shutdown on GE910 23 4 3 1 Hardware Unconditional shutdown 23 5 Power Supply 26 5 1 Power Supply Requirements 26 5 2 Power Consumption 27 5 3 General Design Rules 28 5 3 1 Electrical...

Страница 6: ...1 4 Indication of network service availability 55 11 5 RTC Bypass out 56 11 6 External SIM Holder Implementation 56 11 7 ADC Converter 56 11 7 1 Description 56 11 7 2 Using ADC Converter 56 12 Mountin...

Страница 7: ...t Information Support For general contact technical support to report documentation errors and to order manuals contact Telit s Technical Support Center TTSC at TS EMEA telit com TS NORTHAMERICA telit...

Страница 8: ...and layout Chapter 4 Hardware Commands How to operate on the module via hardware Chapter 5 Power supply Power supply requirements and general design rules Chapter 6 Antenna The antenna connection and...

Страница 9: ...rts the user to important points about integrating the module if these points are not followed the module and end user equipment may fail or malfunction Tip or Information Provides advice and suggesti...

Страница 10: ...atory 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 wit...

Страница 11: ...DTE CMOS 1 8V P14 C107 DSR O Output for DSR to DTE CMOS 1 8V R14 C125 RING O Output for Ring RI to DTE CMOS 1 8V Asynchronous Auxiliary UART D15 TX_AUX O Auxiliary UART TX Data to DTE CMOS 1 8V E15 RX...

Страница 12: ...Antenna 50 ohm RF MISCELLANEOUS FUNCTIONS R13 HW_SHUTDOWN I HW Unconditional Shutdown CMOS 1 8V Active low R12 ON_OFF I Input command for power ON CMOS 1 8V Active low C14 VRTC I VRTC Backup capacitor...

Страница 13: ...und Power P5 GND Ground Power R5 GND Ground Power N6 GND Ground Power P6 GND Ground Power R6 GND Ground Power P8 GND Ground Power R8 GND Ground Power P9 GND Ground Power P10 GND Ground Power R10 GND G...

Страница 14: ...ERVED P12 RESERVED RESERVED F14 RESERVED RESERVED G14 RESERVED RESERVED H14 RESERVED RESERVED J14 RESERVED RESERVED K14 RESERVED RESERVED N13 RESERVED RESERVED L13 RESERVED RESERVED J13 RESERVED RESER...

Страница 15: ...not used almost all pins should be left disconnected The only exceptions are the following pins NOTE RTS pin should be connected to the GND on the module side if flow control is not used The above pin...

Страница 16: ...MIN MIC RES RES GND GND GND GND 5 SIMIO MIC RES GND GND GND 6 SIMCL K DVI_RX RES GND GND GND 7 SIMRST DVI_TX RES RES RES RES 8 RES DVI_CL K GPIO_01 RES GND GND 9 RES DVI_WA 0 GPIO_02 RES GND RES 10 RE...

Страница 17: ...ple circuit to do it is 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 GE910 power regulator and improper po...

Страница 18: ...The flow chart showing the proper turn on procedure is displayed below NOTE In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digit...

Страница 19: ...5 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 19 of 73 Mod 0805 2011 07 Rev 2 The Flow chart showing the AT commands managing procedure is...

Страница 20: ...2 06 25 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 20 of 73 Mod 0805 2011 07 Rev 2 For example 1 Let s assume you need to drive the ON pad...

Страница 21: ...device will not be reachable any more To turn OFF the GE910 the pad ON must be tied low for at least 2 seconds and then released A Pulse duration less than 2 seconds should also start the power off pr...

Страница 22: ...Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 22 of 73 Mod 0805 2011 07 Rev 2 The following flow chart shows the proper turnoff procedure Mod...

Страница 23: ...t the device gets stacked waiting for some network or SIM responses To unconditionally Shutdown the GE910 the pad HW_SHUTDOWN must be tied low for at least 200 milliseconds and then released After thi...

Страница 24: ...Mod 0805 2011 07 Rev 2 In the following flow chart is detailed the proper restart procedure NOTE In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal...

Страница 25: ...User Guide 1vv0300962 Rev 4 2012 06 25 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 25 of 73 Mod 0805 2011 07 Rev 2 For example 1 Let us as...

Страница 26: ...ill follow for a proper design 5 1 Power Supply Requirements The external power supply must be connected to VBATT VBATT_PA signals and must fulfill the following requirements POWER SUPPLY Nominal Supp...

Страница 27: ...00 PL0 160 GPRS Sending data mode GPRS class 10 2TX 3RX GSM900 PL5 360 DCS1800 PL0 290 GPRS Sending data mode The GSM system is made in a way that the RF transmission is not continuous else it is pack...

Страница 28: ...typically automotive Battery 5 3 1 1 5V input Source Power Supply Design Guidelines The desired output for the power supply is 3 8V hence there s not a big difference between the input source and the...

Страница 29: ...to respond quickly to the current peaks absorption In any case the frequency and Switching design selection is related to the application to be developed due to the fact the switching frequency could...

Страница 30: ...tage can rise over the absolute maximum voltage for the GE910 and damage it NOTE DON T USE any Ni Cd Ni MH and Pb battery types directly connected with GE910 Their use can lead to overvoltage on the G...

Страница 31: ...t during idle especially if Power Saving function is enabled it is possible to consider from the thermal point of view that the device absorbs current significantly only during calls For the heat gene...

Страница 32: ...o avoid the voltage drops on the power line at the current peaks frequency of 216 Hz that will reflect on all the components connected to that supply introducing the noise floor at the burst base freq...

Страница 33: ...the network operator the customer shall use the most suitable antenna for that those band s Bandwidth 70 MHz in GSM850 80 MHz in GSM900 170 MHz in DCS 140 MHz PCS band Gain 1 4dBi 900 and 3dBi 1800 1...

Страница 34: ...nstant cross section avoid meanders and abrupt curves Any kind of suitable geometry structure Microstrip Stripline Coplanar Grounded Coplanar Waveguide can be used for implementing the printed transmi...

Страница 35: ...as possible thus leading to lowest power losses possible A Grounded Coplanar Waveguide G CPW line has been chosen since this kind of transmission line ensures good impedance control and can be implem...

Страница 36: ...ansmission line measurements HP8753E VNA Full 2 port calibration has been used in this measurement session A calibrated coaxial cable has been soldered at the pad corresponding to GE910 RF output a SM...

Страница 37: ...06 25 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 37 of 73 Mod 0805 2011 07 Rev 2 Line input impedance in Smith Chart format once the line...

Страница 38: ...vered by the GSM signal If the device antenna is located greater then 20cm from the human body and there are no co located transmitter then the Telit FCC IC approvals can be re used by the end product...

Страница 39: ...cally stated all the interface circuits work at 1 8V CMOS logic levels The following table shows the logic level specifications used in the GE910 interface circuits Absolute Maximum Ratings Not Functi...

Страница 40: ...y detach operation from the network where it is registered This behavior is not a proper shut down because any GSM device is requested to issue a detach request on turn off For this reason the uncondi...

Страница 41: ...Receive Transmit microcontroller UART 3V or other voltages different from 1 8V microcontroller UART 5V or other voltages different from 1 8V Depending from the type of serial port on the OEM hardware...

Страница 42: ...E910 that indicates the module is ready 7 RTS rts_uart L14 Request to Send Input to the GE910 that controls the Hardware flow control 8 CTS cts_uart P15 Clear to Send Output from the GE910 that contro...

Страница 43: ...nslator Note that the negative signal voltage must be less than 0V and hence some sort of level translation is always required The simplest way to translate the levels and invert the signal is by usin...

Страница 44: ...A written authorization All Rights Reserved page 44 of 73 Mod 0805 2011 07 Rev 2 An example of RS232 level adaptation circuitry could be done using a MAXIM transceiver MAX218 In this case the chipset...

Страница 45: ...erial bus USB transceiver USB 2 0 FS 9 1 USB 2 0 FS This port is compliant with the USB 2 0 specifications The following table is listing the available signals PAD Signal I O Function Type B15 USB_D I...

Страница 46: ...or the microphone has to be as clean as possible the first connection single ended is prefearable since the Vmic noise and ground noise are fed into the input as common mode and then rejected This sou...

Страница 47: ...MIC MIC GND 10K 2 5v TELIT MODULE INPUT ADC If a balanced way is anyway desired much more care has to be taken to Vmic noise and ground noise also the 33pF 100Ohm 33pF RF filter has to be doubled one...

Страница 48: ...ULE INPUT ADC 100n 100 33pF 33pF 100n 100 33pF 33pF MIC MIC GND TELIT MODULE INPUT ADC LINE_IN LINE_IN If the audio source is not a mike but a different device the following connections can be done Pl...

Страница 49: ...outputs can drive directly a small loudspeaker with electrical impedance not lower than 8Ohm TIP in order to get the maximum audio level at a given output voltage level dBspl Vrms the following break...

Страница 50: ...0dBm0 1KHz Differential input voltage AT HFMICG 0 290mVrms AT HFMICG 1 6dB 145mVrms AT HFMICG 2 12dB 72mVrms AT HFMICG 3 18dB 36mVrms AT HFMICG 4 24dB 18mVrms AT HFMICG 5 30dB 9mVrms AT HFMICG 6 36dB...

Страница 51: ...rential output voltage 550mVrms 0dBm0 volume increment 2dB per step volume steps 0 10 in default condition AT CLVL 10 AT HFRECG 0 WARNING When in Single Ended configuration the unused output line must...

Страница 52: ...ternate function pad is internally controlled by the GE910 firmware and acts depending on the function implemented The following table shows the available GPIO on the GE910 PAD Signal I O Function Typ...

Страница 53: ...ly stated all the interface circuits work at 1 8V CMOS logic levels The following table shows the logic level specifications used in the GE910 interface circuits Absolute Maximum Ratings Not Functiona...

Страница 54: ...8V CMOS levels of the GPIO If the digital output of the device to be connected with the GPIO input pad has interface levels different from the 1 8V CMOS then it can be buffered with an open collector...

Страница 55: ...STAT_LED pin status shows information on the network service availability and Call status In the GE910 modules the STAT_LED usually needs an external transistor to drive an external LED Therefore the...

Страница 56: ...ery NO Devices must be powered from this pin WARNING Never connect VRTC pin to VBATT 11 6 External SIM Holder Implementation Please refer to the related User Guide SIM Holder Design Guides 80000NT1000...

Страница 57: ...ommunications S p A written authorization All Rights Reserved page 57 of 73 Mod 0805 2011 07 Rev 2 12 Mounting the GE910 on your Board 12 1 General The GE910 modules have been designed in order to be...

Страница 58: ...73 Mod 0805 2011 07 Rev 2 12 3 Recommended foot print for the application In order to easily rework the GE910 is suggested to consider on the application a 1 5mm Inhibit area around the module It is...

Страница 59: ...Rights Reserved page 59 of 73 Mod 0805 2011 07 Rev 2 12 4 Stencil Stencil s apertures layout can be the same of the recommended footprint 1 1 we suggest a thickness of stencil foil 120 m 12 5 PCB pad...

Страница 60: ...tself see following figure Holes in pad are allowed only for blind holes and not for through holes When using the hole in pad we suggest the via filling Recommendations for PCB pad surfaces Finish Lay...

Страница 61: ...ithout Telit Communications S p A written authorization All Rights Reserved page 61 of 73 Mod 0805 2011 07 Rev 2 12 7 Solder paste Lead free Solder paste Sn Ag Cu We recommend to use only no clean sol...

Страница 62: ...y embly embly embly Average ramp up rate TL to TP 3 C second max Preheat Temperature Min Tsmin Temperature Max Tsmax Time min to max ts 150 C 200 C 60 180 seconds Tsmax to TL Ramp up Rate 3 C second m...

Страница 63: ...Rev 2 13 Debug of the GE910 in production To test and debug the mounting of the GE910 we strongly recommend to foreseen test pads on the host PCB in order to check the connection between the GE910 its...

Страница 64: ...Rev 4 2012 06 25 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 64 of 73 Mod 0805 2011 07 Rev 2 14 Packing system 14 1 Packing on tray The GE...

Страница 65: ...e 10 Hardware User Guide 10 Hardware User Guide 10 Hardware User Guide 1vv0300962 Rev 4 2012 06 25 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved p...

Страница 66: ...of components Moreover the customer has to take care of the following conditions a The shelf life of the Product inside of the dry bag must be 12 months from the bag seal date when stored in a non co...

Страница 67: ...PRS module vastavust direktiivi 1999 5 E p hin uetele ja nimetatud direktiivist tulenevatele teistele asjakohastele s tetele German Hiermit erkl rt Telit Communications S p A dass sich das Ger t Quad...

Страница 68: ...unications S p A declara que este Quad Band GSM GPRS module est conforme com os requisitos essenciais e outras disposi es da Directiva 1999 5 CE Slovak Telit Communications S p A t mto vyhlasuje e Qua...

Страница 69: ...nillas M laga SPAIN Notified Body No 1909 Thus the following marking is included in the product The full declaration of conformity can be found on the following address http www telit com There is no...

Страница 70: ...reil est conforme aux CNR d Industrie Canada applicables aux appareils radio exempts de licence L exploitation est autoris e aux deux conditions suivantes 1 l appareil ne doit pas produire de brouilla...

Страница 71: ...ates 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...

Страница 72: ...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 sav...

Страница 73: ...of 73 Mod 0805 2011 07 Rev 2 17 Document History R Re ev vi is si io on n D Da at te e C Ch ha an ng ge es s Rev 0 2011 11 11 First Release Rev 0 Preliminary 1 Rev 1 2012 02 27 First Release Rev 1 Rev...

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