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Telit Wireless Solutions GE864-QUAD/PY, User Manual

The Telit Wireless Solutions GE864-QUAD/PY is a high-performance cellular module offering reliable wireless connectivity. Enhance your user experience by easily accessing the comprehensive User Manual, available for free download on our website. Discover the full potential of this product and unlock its capabilities with our user-friendly manual.

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GE865 Hardware User Guide 

1vv0300799 Rev.9 – 27-07-2009   

  

  

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

 

page 4 of 70 

 

Contents 

APPLICABILITY

 

TABLE.............................................................................................................................................................2

 

1

 

INTRODUCTION ..................................................................................................................................................... 6

 

1.1

 

S

COPE

................................................................................................................................................................................6

 

1.2

 

A

UDIENCE

...........................................................................................................................................................................6

 

1.3

 

C

ONTACT

 

I

NFORMATION

,

 

S

UPPORT

..........................................................................................................................................6

 

1.4

 

D

OCUMENT

 

O

RGANIZATION

...................................................................................................................................................7

 

1.5

 

T

EXT

 

C

ONVENTIONS

..............................................................................................................................................................8

 

1.6

 

R

ELATED

 

D

OCUMENTS

...........................................................................................................................................................8

 

1.7

 

D

OCUMENT

 

H

ISTORY

............................................................................................................................................................9

 

2

 

OVERVIEW .......................................................................................................................................................... 10

 

3

 

GE865

 

MECHANICAL

 

DIMENSIONS....................................................................................................................... 11

 

4

 

GE865

 

MODULE

 

CONNECTIONS ........................................................................................................................... 12

 

4.1

 

PIN

‐

OUT .........................................................................................................................................................................12

 

4.1.1

 

BGA

 

Balls

 

Layout ....................................................................................................................................................15

 

5

 

HARDWARE

 

COMMANDS .................................................................................................................................... 17

 

5.1

 

T

URNING

 

ON

 

THE

 

GE865 ...................................................................................................................................................17

 

5.2

 

T

URNING

 

OFF

 

THE

 

GE865 ..................................................................................................................................................20

 

5.2.1

 

Hardware

 

shutdown ..............................................................................................................................................21

 

5.2.2

 

Hardware

 

Unconditional

 

Restart ...........................................................................................................................22

 

6

 

POWER

 

SUPPLY ................................................................................................................................................... 24

 

6.1

 

P

OWER

 

S

UPPLY

 

R

EQUIREMENTS

............................................................................................................................................24

 

6.2

 

P

OWER

 

C

ONSUMPTION

.......................................................................................................................................................25

 

6.3

 

G

ENERAL

 

D

ESIGN

 

R

ULES

......................................................................................................................................................26

 

6.3.1

 

Electrical

 

Design

 

Guidelines ...................................................................................................................................26

 

6.3.2

 

Thermal

 

Design

 

Guidelines.....................................................................................................................................30

 

6.3.3

 

Power

 

Supply

 

PCB

 

layout

 

Guidelines......................................................................................................................31

 

7

 

ANTENNA ............................................................................................................................................................ 32

 

7.1

 

GSM

 

A

NTENNA

 

R

EQUIREMENTS

...........................................................................................................................................32

 

7.2

 

GSM

 

A

NTENNA

 

‐

 

PCB

 

LINE

 

G

UIDELINES

.................................................................................................................................33

 

7.3

 

GSM

 

A

NTENNA

 

‐

 

I

NSTALLATION

 

G

UIDELINES

...........................................................................................................................34

 

8

 

LOGIC

 

LEVEL

 

SPECIFICATIONS .............................................................................................................................. 35

 

8.1

 

R

ESET

 

SIGNAL

....................................................................................................................................................................36

 

9

 

SERIAL

 

PORTS ...................................................................................................................................................... 37

 

9.1

 

MODEM

 

SERIAL

 

PORT ....................................................................................................................................................37

 

9.2

 

RS232

 

LEVEL

 

TRANSLATION

..................................................................................................................................................39

 

9.3

 

5V

 

UART

 

LEVEL

 

TRANSLATION

..............................................................................................................................................42

 

10

 

AUDIO

 

SECTION

 

OVERVIEW............................................................................................................................. 44

 

10.1

 

E

LECTRICAL

 

C

HARACTERISTICS

.............................................................................................................................................45

 

10.1.1

 

Input

 

Lines............................................................................................................................................................45

 

Summary of Contents for GE864-QUAD/PY

Page 1: ...GE865 Hardware User Guide 1vv0300799 Rev 9 27 07 2009 ...

Page 2: ...GE865 Hardware User Guide 1vv0300799 Rev 9 27 07 2009 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 2 of 70 APPLICABILITY TABLE PRODUCT GE865 ...

Page 3: ...e foregoing Telit 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 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 standa...

Page 4: ...5 1 TURNING ON THE GE865 17 5 2 TURNING OFF THE GE865 20 5 2 1 Hardware shutdown 21 5 2 2 Hardware Unconditional Restart 22 6 POWER SUPPLY 24 6 1 POWER SUPPLY REQUIREMENTS 24 6 2 POWER CONSUMPTION 25 6 3 GENERAL DESIGN RULES 26 6 3 1 Electrical Design Guidelines 26 6 3 2 Thermal Design Guidelines 30 6 3 3 Power Supply PCB layout Guidelines 31 7 ANTENNA 32 7 1 GSM ANTENNA REQUIREMENTS 32 7 2 GSM AN...

Page 5: ...3 Power Supply Influence 52 11 8 4 Working Current Influence 52 11 9 INDICATION OF NETWORK SERVICE AVAILABILITY 53 11 10 RTC BYPASS OUT 54 11 11 EXTERNAL SIM HOLDER IMPLEMENTATION 54 12 DAC AND ADC SECTION 55 12 1 DAC CONVERTER 55 12 1 1 Description 55 12 1 2 Enabling DAC 56 12 1 3 Low Pass Filter Example 56 12 2 ADC CONVERTER 57 12 2 1 Description 57 12 2 2 Using ADC Converter 57 13 MOUNTING THE ...

Page 6: ...ical support to report 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 use http www telit com en products technical support center contact php For detailed information about where you can buy the Telit modules or for recommendations on accessories and com...

Page 7: ...r 6 Power supply Power supply requirements and general design rules Chapter 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 logic levels for this module Chapter 9 Serial ports The serial port on the Telit GE865 is the core of the interface between t...

Page 8: ...the module if these points are not followed the module and end user equipment may fail or malfunction Tip or Information Provides advice 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 settings application note 80000NT10007a Digital Voice Interface Appli...

Page 9: ...emoved Added better explanation of pin H5 RF and H1 service ISSUE 4 2009 04 02 Updated VBATT supply Range DAC schematic Conformity assessment ISSUE 5 03 06 2009 Updated section 13 FCC Conformity assessment ISSUE 6 04 06 2009 Updated section 13 FCC Conformity assessment ISSUE 7 2009 05 26 Applied new layout minor editing Edited PCB pad design par 13 1 6 ISSUE 8 2009 06 18 Updated all schematic draw...

Page 10: ...he GSM GPRS GE865 cellular module within user application shall be done according to the design rules described in this manual IT L integrazione del modulo cellulare GSM GPRS GE865 all interno dell applicazione dell utente dovrà rispettare le indicazioni progettuali descritte in questo manuale DE Die Integration des GE865 GSM GPRS Mobilfunk Moduls in ein Gerät muß gemäß der in diesem Dokument besc...

Page 11: ...9 Rev 9 27 07 2009 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 11 of 70 3 GE865 Mechanical Dimensions The GE865 overall dimensions are Length 22 mm Width 22 mm Thickness 3 0 mm ...

Page 12: ...Auxiliary UART RX Data CMOS 2 8V Prog Data HW Flow Control A3 C103 TXD I Serial data input TXD from DTE CMOS 2 8V A4 C104 RXD 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 Output for Clear to send signal CTS to DTE CMOS 2 8V B5 C109 DCD O Output for ...

Page 13: ... 2 8V E4 GPIO_03 I O GPIO03 GPIO I O pin CMOS 2 8V H7 GPIO_04 TX_DISAB I O GPIO04 Configurable GPIO TX Disable input CMOS 2 8V G2 GPIO_05 RFTXMON I O GPIO05 Configurable 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 I O GPIO08 Configurable GPIO CMOS 2 8V F4 GPIO_09 I O G...

Page 14: ...ation All Rights Reserved page 14 of 70 WARNING Reserved pins must not be connected NOTE If not used almost all pins should be left disconnected The only exceptions are the following pins pin signal F1 F2 F3 VBATT VBATT_PA G1 C2 C7 E5 E7 G5 G4 G3 H3 H6 GND B1 ON OFF A3 TXD C1 RESET A4 RXD A1 RTS1 D1 TXD_AUX E1 RXD_AUX H1 Service ...

Page 15: ..._AUX RXD_AUX VBATT GND SERVICE 2 C106 CTS C107 DSR GND GPIO_02 PWRMON VBATT_P A GPIO_05 VRTC 3 C103_TXD C108 DTR GPIO_01 GPIO_10 VBATT_P A GND GND 4 C104 RXD C125 RING GPIO_08 GPIO_03 GPIO_09 GND 5 SIMCLK C109 DCD GND ADC1 GND ANT 6 SIMIO ADC2 GPIO_07 GND 7 SIMVCC SIMIN GND GND DAC GPIO_04 8 SIMRST MIC MIC EAR EAR STATLED GPIO_06 LEGENDA AUDIO SIM CARD ANTENNA UARTS DAC and ADC MISCELLANEOUS GPIO ...

Page 16: ...on forbidden without Telit Communications S p A written authorization All Rights Reserved page 16 of 70 NOTE The pin defined as H4 has to be considered RESERVED and not connected on any pin in the application The related area on the application has to be kept empty ...

Page 17: ...eased When the power supply voltage is lower than 3 4V the pad ON must be tied low at least 3 seconds The maximum current that can be drained from the ON pad is 0 1 mA A simple 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 GE865 power regulator and improper power on off of the module Th...

Page 18: ... the lines that are inverted hence have active low signals are labelled with a name that ends with or with a bar over the name TIP To check if the device has powered on the hardware line PWRMON should be monitored After 900ms the line raised up the device could be considered powered on NOTE It is mandatory to avoid sending data to the serial ports during the first 200mS of the module startup ...

Page 19: ...er Guide 1vv0300799 Rev 9 27 07 2009 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 19 of 70 A flow chart showing the proper turn on procedure is displayed below ...

Page 20: ...controller uP_OUT1 2 Let s assume you need to drive the ON pad directly with an ON OFF button 5 2 Turning OFF the GE865 The turning off of the device can be done in three ways by software command see GE865 Software User Guide by hardware shutdown 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...

Page 21: ...0 5 2 1 Hardware shutdown To turn OFF the GE865 the pad ON must be tied low for at least 2 seconds and then released The same circuitry and timing for the power on shall be used The device shuts down after the release of the ON pad TIP To check if the device has powered off the hardware line PWRMON should be monitored When PWRMON goes low the device has powered off ...

Page 22: ...ns S p A written authorization All Rights Reserved page 22 of 70 5 2 2 Hardware Unconditional Restart To unconditionally Restart the GE865 the pad RESET must be tied low for at least 200 milliseconds and then released A simple circuit to do it is The following flow chart shows the proper Reset procedure ...

Page 23: ...up problems on the GE865 power regulator and improper functioning of the module The line RESET must be connected only in open collector configuration NOTE 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 pad with a totem pole output of a 3 5 V microcontrolle...

Page 24: ...PA signals and must fulfill the following requirements POWER SUPPLY Nominal Supply Voltage 3 8 V Normal Operating Voltage Range 3 4 V 4 2 V Extended Operating Voltage Range 3 22 V 4 5 V NOTE The Operating Voltage Range MUST never be exceeded care must be taken in order to fulfill min max voltage requirement NOTE Overshoot voltage regarding MAX Extended Operating Voltage and drop in voltage regardi...

Page 25: ...nding data mode GPRS class 10 2TX GSM900 PL5 473 8 DCS1800 PL0 307 8 GPRS Sending data mode 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 the relative current peaks can be as high as about 2A Therefore the power supply has to be designed in order to withstand with these current peaks without big volt...

Page 26: ...ry 6 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 desired output and a linear regulator can be used A switching power supply will not be suited because of the low drop out requirements When using a linear regulator a proper heat sink shall be provided in order to dissipate th...

Page 27: ...or a 500kHz or more switching frequency regulator is preferable because of its smaller inductor size and its faster transient response This allows the regulator 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 also generate EMC interferences For car...

Page 28: ...ications a spike protection diode should be inserted close to the power input in order to clean the supply from spikes A protection diode should be inserted close to the power input in order to save the GE865 from power polarity inversion This can be the same diode as for spike protection An example of switching regulator with 12V input is in the below schematic split in 2 parts ...

Page 29: ... 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 Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks a 100μF tantalum capacitor is usually suited Make sure the low ESR capacitor usually a tanta...

Page 30: ...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 one hour then the power supply has always the time to cool down between the calls and the heat sink could be smaller than the calculated one for 500mA maximum RMS current or even could be the simple chi...

Page 31: ...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 frequency For this reason while a voltage drop of 300 400 mV may be acceptable from the power loss point of view the same voltage drop may not be acceptable from the noise point of view If your application doesn t have audio interface but only uses the da...

Page 32: ...vice shall fulfil 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 Gain 3dBi Impedance 50Ω Input power 2 W peak power VSWR absolute max 10 1 VSWR recommended 2 1 When usi...

Page 33: ...tion conditions for satisfying RF exposure compliance Antennas used for this OEM module must not exceed 3dBi gain for mobile and fixed operating configurations 7 2 GSM Antenna PCB line Guidelines Ensure that the antenna line impedance is 50Ω Keep the antenna line on the PCB as short as possible since the antenna line loss shall be less than 0 3 dB Antenna line must have uniform characteristics con...

Page 34: ...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 from the human body or there are no co located transmitter then the additional FCC IC testing may be required for the end product Telit FCC IC approvals cannot be reused Antenna shall not be installed i...

Page 35: ...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 Operating Range Interface levels 2 8V CMOS Level Min Max Input high level 2 1V 3 0V Input low level 0V 0 5V Output high level 2 2V 3 0V Output low level 0V 0 35V For 1 8V signals Operating Range Interface le...

Page 36: ...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 always a proper power on reset sequence so there s no need to control this pin on start up It may only be used to reset a device already on that is not responding to any command NOTE Do not use this sign...

Page 37: ...roller UART 5V 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 need a level translation is the 2 8V UART The serial port on the GE865 is a 2 8V UART with all the 7 RS232 signals It differs from the PC RS232 in the signal polarity RS232 is reversed an...

Page 38: ...H6 Ground ground 6 DSR dsr_uart B2 Data Set Ready Output from the GE865 that indicates the module is ready 7 RTS rts_uart A1 Request to Send Input to the GE865 that controls the Hardware flow control 8 CTS cts_uart 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 Accor...

Page 39: ...implest way to translate the levels and invert the signal is by using a single chip level 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 the driver is the level translator from the 0 2 8V UART to the RS232 level The receiver is the translator from t...

Page 40: ...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 set with a value compatible with the logic levels of the module Max 2 9V DC In this configuration the SP3282EB will adhere to EIA TIA 562 voltage levels instead of RS232 5 5V ...

Page 41: ...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 lines NOTE In this case has to be taken in account the length of the lines on the application to avoid problems in case of High speed rates on RS232 The RS232 serial port lines are usually connected to a...

Page 42: ...vels of the two set of signals As for the RS232 translation there are a multitude of single chip translators For 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 UART input line TXD rx_uart of the GE865 is NOT internally pulled up with a resistor so there may be the need to p...

Page 43: ...written authorization All Rights Reserved page 43 of 70 NOTE The input lines working at 2 8VCMOS can be pulled up with 47KΩ In case of reprogramming of the module has to be considered the use of the RESET line to start correctly the activity The preferable configuration is having an external supply for the buffer ...

Page 44: ... of the GE865 provides one audio path both in Uplink transmit and in Downlink receive direction as shown in the next figure For more information refer to Telit document 80000NT10007a Audio Settings Application Note Audio Section Block Diagram Single ended Balanced Balanced Single ended Bias 16 MICN1 MIC 1 MICP1 100nF MIC 100nF MIC xgoldafe skd Baseband Audio Front End EPN1 EP P1 Ear Ear Earpiece D...

Page 45: ...y for particular application 10 1 1 Input Lines MIC 1 differential microphone path Line Coupling AC Line Type Balanced Coupling capacitor 100nF Differential input resistance 50kΩ Differential input voltage 1 03Vpp MicG 0dB WARNING AC means that the signals from the microphone have to be connected to input lines of the module through capacitors which value has to be 100nF Not respecting this constr...

Page 46: ...Hz 3dB max differential output voltage 1 31 Vrms typical open circuit differential output voltage 328mVrms 16 Ω 12dBFS volume increment 2 dB per step volume steps 10 0dBFS is the normalized overall Analog Gain equal to 3 7Vpp differential TIP We suggest driving the load differentially thus the output swing will double and the need for the big output coupling capacitor avoided However if particular...

Page 47: ...O_01 I O GPIO01 Configurable GPIO CMOS 2 8V 1uA 1mA INPUT 0 0 GPIO_02 I O GPIO02 Configurable GPIO CMOS 2 8V 1uA 1mA INPUT 0 0 Alternate function JDR GPIO_03 I O GPIO03 Configurable GPIO CMOS 2 8V 1uA 1mA INPUT 0 0 GPIO_04 I O GPIO04 Configurable GPIO CMOS 2 8V 1uA 1mA INPUT 0 0 Alternate function RF Transmission Control GPIO_05 I O GPIO05 Configurable GPIO CMOS 2 8V 1uA 1mA INPUT 0 0 Alternate fu...

Page 48: ...rface circuits work at 2 8V CMOS logic levels The following table shows the logic level specifications used in the GE865 interface circuits Absolute Maximum Ratings Not Functional Parameter Min Max Input level on any digital pin when on CMOS 2 8 0 3V 3 1V Input 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 C...

Page 49: ...utputs can drive 2 8V CMOS digital devices or compatible hardware When set as outputs the pads have a push pull output and therefore the pull up resistor may be omitted 11 4 Using the RF Transmission Control GPIO4 The GPIO4 pin when configured as RF Transmission Control Input permits to disable the Transmitter when the GPIO is set to Low by the application In the design is necessary to add a pull ...

Page 50: ...completely turn off either the application and the GE865 during sleep periods dramatically reducing the sleep consumption to few μA In battery powered devices this feature will greatly improve the autonomy of the device 11 7 Using the Buzzer Output GPIO7 The GPIO7 pad when configured as Buzzer Output is controlled by the GE865 module and will drive a Buzzer driver with appropriate square waves Thi...

Page 51: ...Short Description A magnetic Buzzer is a sound generating device with a coil located in the magnetic circuit consisting of a permanent magnet an iron core a high permeable metal disk and a vibrating diaphragm Drawing of the Magnetic Buzzer The disk and diaphragm are attracted to the core by the magnetic field When an oscillating signal is moved through the coil it produces a fluctuating magnetic f...

Page 52: ...plitude of the driving signal the response bandwidth tends to become narrow and vice versa Summarizing Vpp Æ fo Vpp Æ fo The risk is that the fo could easily fall outside of new bandwidth consequently the SPL could be much lower than the expected 11 8 4 Working Current Influence In the component data sheet you will find the value of MAX CURRENT this represents the maximum average current that can ...

Page 53: ...k service availability and Call status In the GE865 modules the STAT_LED usually needs an external transistor to drive an external LED Therefore the status indicated in the following table is reversed with respect to the pin status LED status Device Status Permanently off Device off Fast blinking Period 1s Ton 0 5s Net search Not registered turning off Slow blinking Period 3s Ton 0 3s Registered f...

Page 54: ...Clock 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 order to increase the RTC autonomy during power off of the battery NO Devices must be powered from this pin 11 11 External SIM Holder Implementation Please refer to the related User Guide SIM Holder...

Page 55: ... 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 necessary Min Max Units Voltage range filtered 0 2 6 Volt Range 0 1023 Steps The precision is 10 bits so if we consider that the maximum voltage is 2V the integrated voltage could be calculated with th...

Page 56: ... 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 Guide or AT Commands Reference Guide for the full description of this function NOTE The DAC frequency is selected internally D A converter must not be used during POWERSAVING 12 1 3 Low Pass Filter Examp...

Page 57: ...11 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 and Pin 19 of PL102 on GE865 Interface Board CS1324 ADC_IN2 available on Ball F6 and Pin 20 of PL102 on GE865 Interface Board CS1324 12 2 2 Using ADC Converter An AT command is available to use the ADC...

Page 58: ... A written authorization All Rights Reserved page 58 of 70 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 process 13 2 Module finishing dimensions Lead free Alloy Surface finishing Sn Ag Cu for all solder pads Pin A1 ...

Page 59: ...r the application In 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 avoid having a mechanical part of the application in direct contact with the module NOTE In the customer application the region under INHIBIT WIRING 1 see figure must be clear from signal or ground paths...

Page 60: ...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 the customer application these pads include but are not limited to the following signals TXD RXD ON OFF RESET GND VBATT TX_AUX RX_AUX PWRMON SERVICE 13 5 Stencil Stencil s apertures layout can be the...

Page 61: ...cations S p A written authorization All Rights Reserved page 61 of 70 13 6 PCB pad design Non solder 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 05 ...

Page 62: ... holes and not for through holes Recommendations for PCB pad surfaces Finish Layer thickness µm Properties Electro less Ni 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 should be discussed with the PCB supplier Generally the wettability of tin lead sold...

Page 63: ...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 Rate 3 C second max Time maintained above Temperature TL Time tL 217 C 60 150 seconds Peak Temperature Tp 245 0 5 C Time within 5 C of actual Peak Temperature tp 10 30 seconds Ramp down Rate 6 C second...

Page 64: ...oduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 64 of 70 NOTE All temperatures refer to topside of the package measured on the package body surface WARNING The GE865 module withstands one reflow process only ...

Page 65: ...en without Telit Communications S p A written authorization All Rights Reserved page 65 of 70 14 Packing system The GE865 modules are packaged on trays of 50 pieces each This is especially suitable for the GE865 according to SMT processes for pick place movement requirements ...

Page 66: ... of 70 NOTE All temperatures refer to topside of the package measured on the package body surface WARNING These trays can withstand at the maximum temperature of 65 C 14 1 Moisture sensibility The level of moisture sensibility of GE865 is 3 in according with standard IPC JEDEC J STD 020 take care all the relatives requirements for using this kind of components ...

Page 67: ...TTE Directive Articles 3 1 a and b Safety and EMC respectively and any relevant Article 3 3 requirements This Hardware User Guide contain all the information you may need for developing a product meeting the R TTE Directive Furthermore the GE865 Module module is FCC Approved as module to be installed in other devices This device is to be used only for fixed and mobile applications If the final pro...

Page 68: ...i 850MHz and 3 0dBi 1900MHz for mobile and fixed or mobile operating configurations 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 teste...

Page 69: ...ring 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 electrostatic 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 ...

Page 70: ...ctives 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 in...

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