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GE865 Hardware User Guide 

1vv0300799 Rev.17– 2017-05-11   

  

  

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

 

 

page 39 of 75 

 

7.3.2.

 

Transmission 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 GE865 RF output; a SMA connector 

has been soldered to the board in order to characterize the losses of the transmission line 

including the connector itself. During Return Loss / impedance measurements, the transmission 

line has been terminated to 50 

Ω load.

 

 

 

 

 

 

 

Return Loss plot of line under test is shown below: 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Содержание GE865

Страница 1: ...GE865 Hardware User Guide 1vv0300799 Rev 17 2017 05 11...

Страница 2: ...65 Hardware User Guide 1vv0300799 Rev 17 2017 05 11 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 2 of 75 APPLICABILITY TABLE PRODUCT GE865 Q...

Страница 3: ...or Telit and its licensors certain exclusive rights for copyrighted material including the exclusive right to copy reproduce in any form distribute and make derivative works of the copyrighted materia...

Страница 4: ...ed into any language or computer language in any form or by any means without prior written permission of Telit High Risk Materials Components units or third party products used in the product describ...

Страница 5: ...conditional restart 22 6 POWER SUPPLY 25 6 1 POWER SUPPLY REQUIREMENTS 25 6 2 POWER CONSUMPTION 26 6 2 1 Power consumption Plots 27 6 3 GENERAL DESIGN RULES 31 6 3 1 Electrical Design Guidelines 31 6...

Страница 6: ...NAL SIM HOLDER IMPLEMENTATION 58 12 DAC AND ADC SECTION 59 12 1 DAC CONVERTER 59 12 1 1 Description 59 12 1 2 Enabling DAC 60 12 1 3 Low Pass Filter Example 60 12 2 ADC CONVERTER 61 12 2 1 Description...

Страница 7: ...port documentation errors and to order manuals contact Telit s Technical Support Center TTSC at TS EMEA telit com TS NORTHAMERICA telit com TS LATINAMERICA telit com TS APAC telit com Alternatively us...

Страница 8: ...7 Antenna The antenna connection and board layout design are the most important parts in the full product design Chapter 8 Logic Level specifications Specific values adopted in the implementation of...

Страница 9: ...ice and suggestions that may be useful when integrating the module All dates are in ISO 8601 format i e YYYY MM DD 1 6 Related Documents Telit s GSM GPRS Family Software User Guide 1vv0300784 Audio se...

Страница 10: ...used as a guide and a starting point for properly developing your product with the Telit GE865 module For further hardware details that may not be explained in this document refer to the Telit GE865 P...

Страница 11: ...17 05 11 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 11 of 75 3 GE865 Mechanical Dimensions The GE865 QUAD overall dimensions are Length 22...

Страница 12: ...O Serial data output to DTE CMOS 2 8V B3 C108 DTR I Input for Data terminal ready signal DTR from DTE CMOS 2 8V A1 C105 RTS I Input for Request to send signal RTS from DTE CMOS 2 8V A2 C106 CTS O Outp...

Страница 13: ...rable GPIO Transmitter ON monitor CMOS 2 8V H8 GPIO_06 ALARM I O GPIO06 Configurable GPIO ALARM CMOS 2 8V G6 GPIO_07 BUZZER I O GPIO07 Configurable GPIO Buzzer CMOS 2 8V D4 GPIO_08 DVI_CLK I O GPIO08...

Страница 14: ...rved page 14 of 75 NOTE If not used almost all pins should be left disconnected The only exceptions are the following pins RTS pin should be connected to the GND on the module side if flow control is...

Страница 15: ...TC 3 C103_TXD C108 DTR GPIO_01 DVI_WA0 GPIO_10 VBATT_P A GND GND 4 C104 RXD C125 RING GPIO_08 DVI_CLK GPIO_03 DVI_TX GPIO_09 GND 5 SIMCLK C109 DCD GND ADC1 GND ANT 6 SIMIO ADC2 GPIO_07 GND 7 SIMVCC SI...

Страница 16: ...tor on the ON line it is internally pulled up Using pull up resistor may bring to latch up problems on the GE865 power regulator and improper power on off of the module The line ON must be connected o...

Страница 17: ...der to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of the GE865 when the module is powered off or during an ON OFF transition...

Страница 18: ...out Telit Communications S p A written authorization All Rights Reserved page 18 of 75 A flow chart showing the AT command managing procedure is displayed below For example AT answer in 1Sec Y N Start...

Страница 19: ...den without Telit Communications S p A written authorization All Rights Reserved page 19 of 75 1 Let s assume you need to drive the ON pad with a totem pole output of a 3 5 V microcontroller uP_OUT1 2...

Страница 20: ...he GE865 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 procedure but this is not guaranteed The same circuit...

Страница 21: ...out Telit Communications S p A written authorization All Rights Reserved page 21 of 75 The following flow chart shows the proper turnoff procedure Modem OFF Proc N Y Disconnect PWR supply N PWMON ON P...

Страница 22: ...cked waiting for some network or SIM responses To unconditionally reboot the GE865 the pad RESET must be tied low for at least 200 milliseconds and then released The maximum current that can be draine...

Страница 23: ...lowing 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 applied to the digital pins of th...

Страница 24: ...2017 05 11 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 24 of 75 For example 1 Let us assume you need to drive the RESET pad with a totem po...

Страница 25: ...nts POWER SUPPLY Nominal Supply Voltage 3 8 V Normal Operating Voltage Range 3 4 V 4 20 V Extended Operating Voltage Range 3 22 V 4 50 V VOLTAGE RIPPLE Normal conditions Power control level for Pout M...

Страница 26: ...X GPRS Sending data mode GSM900 PL5 420 DCS1800 PL0 290 The GSM system is made in a way that the RF transmission is not continuous else it is packed into bursts at a base frequency of about 216 Hz and...

Страница 27: ...s S p A written authorization All Rights Reserved page 27 of 75 6 2 1 Power consumption Plots This document section is showing the typical Current consumption plots using Agilent 66319D in the normal...

Страница 28: ...1vv0300799 Rev 17 2017 05 11 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 28 of 75 GSM900 GPRS Call Power level 5 2 Slot TX 3 Slot RX DCS180...

Страница 29: ...00799 Rev 17 2017 05 11 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 29 of 75 DCS1800 GPRS Call Power level 0 1 Slot TX PCS1900 GPRS Call Po...

Страница 30: ...GE865 Hardware User Guide 1vv0300799 Rev 17 2017 05 11 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 30 of 75...

Страница 31: ...ce 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 desired output and a linear regulator can be used...

Страница 32: ...n any case the frequency and Switching design selection is related to the application to be developed due to the fact the switching frequency could also generate EMC interferences For car PB battery t...

Страница 33: ...the GE865 and damage it NOTE DON T USE any Ni Cd Ni MH and Pb battery types directly connected with GE865 Their use can lead to overvoltage on the GE865 and damage it USE ONLY Li Ion battery types A...

Страница 34: ...current significantly only during calls If we assume that the device stays into transmission for short periods of time let s say few minutes and then remains for a quite long time in idle let s say on...

Страница 35: ...urrent peaks frequency of 216 Hz that will reflect on all the components connected to that supply introducing the noise floor at the burst base frequency For this reason while a voltage drop of 300 40...

Страница 36: ...SWR recommended 2 1 limit to fulfil all regulatory requirements When using the GE865 since there s no antenna connector on the module the antenna must be connected to the GE865 antenna pad BGA Ball H5...

Страница 37: ...ous and sufficiently extended so the geometry can be as similar as possible to the related canonical model Keep if possible at least one layer of the PCB used only for the Ground plane If possible use...

Страница 38: ...ssible A Grounded Coplanar Waveguide G CPW line has been chosen since this kind of transmission line ensures good impedance control and can be implemented in an outer PCB layer as needed in this case...

Страница 39: ...calibration has been used in this measurement session A calibrated coaxial cable has been soldered at the pad corresponding to GE865 RF output a SMA connector has been soldered to the board in order...

Страница 40: ...n without Telit Communications S p A written authorization All Rights Reserved page 40 of 75 Line input impedance in Smith Chart format once the line has been terminated to 50 load is shown in the fol...

Страница 41: ...cated 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 If the device antenna is located less then 20cm fr...

Страница 42: ...Functional Parameter Min Max Input level on any digital pin CMOS 2 8 when on 0 3V 3 1V Input level on any digital pin CMOS 1 8 when on 0 3V 2 1V Input voltage on analog pins when on 0 3V 3 0 V Operati...

Страница 43: ...ormally shutting down the device but only as an emergency exit in the rare case the device remains stuck waiting for some network response The RESET is internally controlled on start up to achieve alw...

Страница 44: ...V or other voltages different from 2 8V Depending from the type of serial port on the OEM hardware a level translator circuit may be needed to make the system work The only configuration that doesn t...

Страница 45: ...t A2 Clear to Send Output from the GE865 that controls the Hardware flow control 9 RI ri_uart B4 Ring Indicator Output from the GE865 that indicates the incoming call condition NOTE According to V 24...

Страница 46: ...el translator There are a multitude of them differing in the number of drivers and receivers and in the levels be sure to get a true RS232 level translator not a RS485 or other standards By convention...

Страница 47: ...example of level translation circuitry of this kind is The example is done with a SIPEX SP3282EB RS232 Transceiver that could accept supply voltages lower than 3V DC NOTE In this case Vin has to be se...

Страница 48: ...case the compliance with RS232 5V is possible Another level adapting method could be done using a standard RS232 Transceiver MAX3237EAI adding some resistors to adapt the levels on the GE865 Input lin...

Страница 49: ...example a possible translator circuit for a 5V TRANSMITTER RECEIVER can be TIP Note that the TC7SZ07AE has open drain output therefore the resistor R2 is mandatory NOTE The input lines working at 2 8...

Страница 50: ...s Reserved page 50 of 75 10 Audio Section Overview The Base Band Chip of the GE865 provides one audio path both in Uplink transmit and in Downlink receive direction as shown in the next figure For mor...

Страница 51: ...on 10 1 1 Input Lines MIC 1 differential microphone path Line Coupling AC Line Type Balanced Coupling capacitor 100nF Differential input resistance 50k Differential input voltage 1 03Vpp MicG 0dB WARN...

Страница 52: ...differential output voltage 328mVrms 16 12dBFS volume increment 2 dB per step volume steps 10 0dBFS is the normalized overall Analog Gain equal to 3 7Vpp differential 11 General Purpose I O The gener...

Страница 53: ...Control GPIO_05 I O GPIO05 Configurable GPIO CMOS 2 8V 1uA 1mA INPUT 0 0 Alternate function RFTXMON GPIO_06 I O GPIO06 Configurable GPIO CMOS 2 8V 1uA 1mA INPUT 0 0 Alternate function ALARM GPIO_07 I...

Страница 54: ...nput level on any digital pin when on CMOS 1 8 0 3V 2 1V Input voltage on analog pins when on 0 3V 3 0V Operating Range Interface levels 2 8V CMOS Level Min Max Input high level 2 1V 3 1V Input low le...

Страница 55: ...th an open collector transistor with a 47K pull up to 2 8V NOTE In order to avoid a back powering effect it is recommended to avoid having any HIGH logic level signal applied to the digital pins of th...

Страница 56: ...Output GPIO6 The GPIO6 pad when configured as Alarm Output is controlled by the GE865 module and will rise when the alarm starts and fall after the issue of a dedicated AT command This output can be...

Страница 57: ...dor 11 8 Indication of network service availability The STAT_LED pin status shows information on the network service availability and Call status In the GE865 modules the STAT_LED usually needs an ext...

Страница 58: ...lock supply which is separate from the rest of the digital part allowing having only RTC going on when all the other parts of the device are off To this power output a backup capacitor can be added in...

Страница 59: ...on GE865 Interface Board CS1324 The on board DAC is a 10 bit converter able to generate a analogue value based a specific input in the range from 0 up to 1023 However an external low pass filter is n...

Страница 60: ...is available to use the DAC function The command is AT DAC enable value value scale factor of the integrated output voltage 0 1023 10 bit precision it must be present if enable 1 Refer to SW User Gui...

Страница 61: ...1 bit word Min Max Units Input Voltage range 0 2 Volt AD conversion 11 bits Resolution 1 mV The GE865 module provides 2 Analog to Digital Converters The input lines are ADC_IN1 available on Ball F5 an...

Страница 62: ...tten authorization All Rights Reserved page 62 of 75 13 Mounting the GE865 on your Board 13 1 General The GE865 modules have been designed in order to be compliant with a standard lead free SMT proces...

Страница 63: ...the application I n order to easily rework the GE865 is suggested to consider on the application a 1 5mm Inhibit area around the module It is also suggested as common rule for an SMT component to avo...

Страница 64: ...n test pads on the host PCB in order to check the connection between the GE865 itself and the application and to test the performance of the module connecting it with an external computer Depending by...

Страница 65: ...der mask defined NSMD type is recommended for the solder pads on the PCB Recommendations for PCB pad dimensions Ball pitch mm 2 4 Solder resist opening diameter A mm 1 150 Metal pad diameter B mm 1 0...

Страница 66: ...i Immersion Au 3 7 0 05 0 15 good solder ability protection high shear force values The PCB must be able to resist the higher temperatures which are occurring at the lead free process This issue shoul...

Страница 67: ...le Profile Feature Pb Free Assembly 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 R...

Страница 68: ...duction forbidden without Telit Communications S p A written authorization All Rights Reserved page 68 of 75 NOTE All temperatures refer to topside of the package measured on the package body surface...

Страница 69: ...thorization All Rights Reserved page 69 of 75 14 Packing system 14 1 Packing on tray The GE865 modules are packaged on trays of 50 pieces each This is especially suitable for the GE865 according to SM...

Страница 70: ...11 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 70 of 75 14 1 1 Tray detail The size of the tray is 329 x 176mm WARNING These trays can with...

Страница 71: ...Telit Communications S p A written authorization All Rights Reserved page 71 of 75 14 2 Packaging on reel The GE865 QUAD can be packaged on reels of 200 pieces each See figure for module positioning...

Страница 72: ...GE865 Hardware User Guide 1vv0300799 Rev 17 2017 05 11 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 72 of 75 14 2 2 Reel detail...

Страница 73: ...of the Product inside of the dry bag must be 12 months from the bag seal date when stored in a non condensing atmospheric environment of 40 C 90 RH b Environmental condition during the production 30 C...

Страница 74: ...ame 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 o...

Страница 75: ...tion ISSUE 9 2009 07 27 Changed par 5 1 Turning ON and par 6 1 Power supply Requirements Changed par 13 3 and par 15 Conformity Assessment Issues ISSUE 10 2009 09 22 Added DVI pins description Updated...

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