Telit Wireless Solutions UC864 User's Manual
Contents
1. cccccecceeeeceeceeeeeeeeeeneeeeeeeeeeteesenaeees 19 5 2 1 2 12V input Source Power Supply Design Guidelines ccccceeseeceeceeeeeeeeeeneeeeeeeeeeseseenaeees 20 5 2 1 3 Battery Source Power Supply Design Guidelines eessesssssesesrneesssnnnneennansannaatennaanannaneeennaananna 22 5 2 1 4 Battery Charge control Circuitry Design Guidelines ec eeeeeeeeeeeeeeeeeteeeeeeeeaeeeeeenaeeeeeeaaes 22 5 2 2 Thermal Desig GUIDGIINGS ereinen renn arana E EEEE AE EEE ue e 24 5 2 3 Power Supply PCB layout Guidelines 00 0 2 cece ener reer dkn innn eenn A ii NENA nAn ARANAN EEANN NAEK 25 6 Anea Eege 26 6 1 Antenna Requirements iniccicsecssescsccsassastescessacesesnesedecsceusicenecssssasausussesessensusensescarnsatinsnantnsasuaes 26 6 2 Antenna Installation Guidelines ccccccssssesseeeeeeeeeeeeeeeeseeeeeeeeeeeenseseeseeeeeeeeeeeeeeeeeseeneeeees 27 7 LOGIC level EE e icisnciiiesavetinneinsdsesiwedincesndiiananssdesrinsiansniuaddnasawadinaninedinaneadiuoaann 28 LS WT e Le e E 29 RB Serie s 30 8 1 MODEM SERIAL POM eegen 30 8 2 RS232 level translation E 32 5V UART level translation sires ccesiziseces toceiscecasscessveeseveueedacestuecdsseecssnesesdvsevdessvevnesssbecdizentinessddvessiiniesies 35 9 USB P itse a E E EE REN ina Ee 37 9 1 Communication ports combinations s s ssssssusrennnnnnnnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn ennnen na 37 10 A dio Section a TEE 38 101 eelerer 38 10 2 Definitions ee ee Eege ee ee2. The UC864 E module is equipped with a RF connector from Murata GSC type P N MM9329 2700B The counterpart suitable is Murata MXTK92 Type or MXTK88 Type Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 11 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 4 Hardware Commands 4 1 Turning ON the UC864 E To turn on UC864 E the pad ON must be tied low for at least 1 second and then released The maximum current that can be drained from the ON pad is 0 1 mA A simple circuit to do it is ON gt R1 2 Ke e rk Ql v VV K Power ON impulse NY di y O R2 S77 GNP NOTE UC864 E turns fully on also by supplying power to the USB_VBUS pin provided there s a battery on the VBATT pads Care must be taken to avoid supplying power to the USB_VBUS pin before the module turns on To check if the UC864 E has powered on the hardware line PWRMON should be monitored When PWRMON goes high the module has powered on 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 UC864 E power regulator and improper power on off of the module The line ON 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 n
3. UC864 E CMOS 2 6V CMOS 2 6V CMOS 2 6V CMOS 2 6V CMOS 2 6V CMOS 2 6V CMOS 2 6V CMOS 2 6V CMOS 2 6V CMOS 2 6V Analog CMOS 2 6V AID AID AID D A PDM CMOS 1 8V Ground 4 4V 5 25V CMOS 2 6V 2 85V Power Power Pull up to VBATT Power CMOS 2 6V CMOS 2 6V CMOS 2 6V CMOS 2 6V CMOS 2 6V page BE of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 Pin Signal UO Function en deg e 61 TGPIO_15 VO Telit GPIO15 Configurable GPIO CMOS 2 6V 62 TGPIO_12 VO Telit GPIO12 Configurable GPIO CMOS 2 6V 63 Ted o O Telit GPIO10 Configurable GPIO PCM Data Output CMOS 2 6V 64 TGPIO 22 VO Telit GPIO22 Configurable GPIO CMOS 1 8V BAS O Telit GPIO18 Configurable GPIO PCM Data input CMOS 2 6V ep TGPIO_03 O Telit GPIO3 Configurable GPIO CMOS 2 6V 67 TGPIO_08 O Telit GPIO8 Configurable GPIO CMOS 2 6V 68 TGPIO_06 ALARM Vo Telit GPIO6 Configurable GPIO ALARM CMOS 2 6V 70 TGPIO_01 VO Telit GPIO1 Configurable GPIO CMOS 2 6V 71 ECNE SYNE VO Telit GPIO17 Configurable GPIO PCM Sync CMOS 2 6V 72 TGPIO_21 O Telit GPIO21 Configurable GPIO CMOS 2 6V 73 ee VO Telit GPIO7 Configurable GPIO Buzzer CMOS 2 6V 74 TGPIO_02 O Telit GPIO02 UO pin CMOS 2 6V 75 TGPIO_16 O Telit GPIO16 Configurable GPIO CMOS 2 6V 76 TGPIO_09 VO Telit GPIO9 Configurable GPIO CMOS 2 6V 77 TGPIO_13 VO Telit GPIO13 Configurable CMOS 2 6V za CPIO_O5 VO Telit GPIO05 Configurable GPIO Transmitter ON monitor CMOS 2 6V RFTXMON
4. USB Interface 79 USB_D VO USB differential Data 2 8V 3 6V 80 USB_D I O USB differential Data 2 8V 3 6V RESERVED 17 41 42 5 43 p 44 47 69 33 34 P NOTE RESERVED pins must not be connected RTS should be connected to the GND on the module side if flow control is not used Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 10 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 NOTE If not used almost all pins should be left disconnected The only exceptions are the following pins Pin Signal Function 1 VBATT Main power supply 2 VBATT Main power supply 3 VBATT Main power supply 4 VBATT Main power supply 5 GND Ground 6 GND Ground 7 GND Ground 46 GND Ground 25 C103 TXD Serial data input TXD from DTE 26 C104 RXD Serial data output to DTE 31 C105 RTS Input for Request to send signal RTS from DTE 53 ON OFF Input command for switching power ON or OFF toggle command 54 RESET Reset input 35 USB_ID Analog input used to sense whether a peripheral device is connected and determine the peripheral type a host or a peripheral Power supply for the internal USB transceiver This pin is configured 48 USB_VBUS as an analog input or an analog output depending upon the type of peripheral device connected 79 USB_D USB differential Data 80 USB_D USB differential Data 3 1 1 UC864 E Antenna connector
5. E mporoduchon ceeeeeeeeeeeeeeneeeeeeeeeeeeeeaeeeseeaeeeseeaeeeeeeiaeeeeeeneeeeeeaes 48 12 Conformity ASSESSMENT ISSUCS iiiiicisssiisasscstiensadaneanncicasnensdcnsnsasiuearsssienanniivadsencdnnnnsadan 49 13 SAFETY RECOMMANDATIONS K icccicceicceccceiccececececececececerececerereceecewecececececeweveneceweveseveweus 50 14 DOCUMENT Change LOG sis casncsticiascsdtcnsccadiscsccedsesancndaduascsdnennsdaduduacundiceasteaddwanasdesentiedndeaaan 51 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 4 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 DISCLAIMER The information contained in this document is the proprietary information of Telit Communications S p A and its affiliates TELIT The contents are confidential and any disclosure to persons other than the officers employees agents or subcontractors of the owner or licensee of this document without the prior written consent of Telit is strictly prohibited Telit makes every effort to ensure the quality of the information it makes available Notwithstanding the 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
6. Period 1s Ton 0 5s turning off Slow blinking Registered full service Period 3s Ton 0 3s Permanently on a Call is active VBATT R101 330 5 0603 LY M676 Q2S1 26 DL101 M676 a a oO STAT_LED Na page 45 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 11 7 RTC Bypass out The VRTC pin brings out the Real Time 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 Parameter Symbol Limit Values Unit min typ max Input Voltage VRTC 1 50 3 0 3 25 V Input current Xtal ON IRTC 1 1 uA NOTE NO Devices must be powered from this pin 11 8 VAUX1 power output A regulated power supply output is provided in order to supply small devices from the module This output is active when the module is ON and goes OFF when the module is shut down The operating range characteristics of the supply are Operating Range VAUX1 power supply Min Typical Max Output voltage 2 75V 2 85V 2 95V Output current 100mA Output bypass capacitor 2 2UF D NOTE During RESET and POWER ON the VAUX line is OFF page 46 of 51 lel it UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 11 9 Mounting UC864 E on your board The position of the
7. Telit Communications S p A written authorization All Rights Reserved page 23 of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 5 2 2 Thermal Design Guidelines The thermal design for the power supply heat sink should be done with the following specifications e Average current consumption during WCDMA transmission PWR level max 620mA e Average current consumption during class12 GPRS transmission PWR level max 930mA NOTE The average consumption during transmissions depends on the power level at which the device is requested to transmit by the network The average current consumption hence varies significantly Considering the very low current 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 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 930mA maximum RMS current or even could be the simple chip package no heat sink Moreover in the average network conditions the device is requested to transmit at a lower power level than the maximum and hence the current consumption will be less than the 930mA being usually
8. and can be input output buzzer output Alternate function 11 1 Logic level specifications Where not specifically stated all the interface circuits work at 2 6V CMOS logic levels The following table shows the logic level specifications used in the UC864 E interface circuits Absolute Maximum Ratings Not Functional UC864 E arameter Min Max Input level on any 0 3V 3 0V digital pin when on Input voltage on 0 3V 3 0 V analog pins when on For 2 6V CMOS signals Operating Range Interface levels UC864 E Level Min Max Input high level 2 0V 2 9V Input low level 0 3V 0 6V Output high level 2 2V 2 6V Output low level OV 0 35V For 1 8V signals Operating Range Interface levels 1 8V CMOS UC864 E Level Min Max Input high level 1 5V 2 1V Input low level 0 3V 0 5V Output high level 1 4V 1 8V Output low level OV 0 35V PAS E a EMA E guaia T Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 42 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 11 2 Using a GPIO Pad as INPUT The GPIO pads when used as inputs can be connected to a digital output of another device and report its status provided this device has interface levels compatible with the 2 6V CMOS levels of the GPIO NOTE If the digital output of the device to be connected with the GPIO input pad has interface levels different from the 2 6V
9. 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 NOTE To turn OFF UC864 E first of all you MUST cut off supplying power to the USB_VBUS or the module does not turn off 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 a TER Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 14 of 51 Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 4 2 2 Hardware Unconditional Restart To unconditionally restart UC864 E the pad RESET must be tied low for at least 200 milliseconds and then released The maximum current that can be drained from the ON pad is 0 15 mA A simple circuit to do it is RESET Pa IT ANA i D VV MI j E J Unconditional Restart Kat KR impulse A A A V yo 4 A 7 GND NOTE Do not use any pull up resistor on the RESET line or any totem pole digital output Using pull up resistor may bring to latch up problems on the UC864 E power regulator and improper functioning of the module The line RESET 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 p as an emergency exit proc
10. drive with appropriate square waves a Buzzer driver This permits to your application to easily implement Buzzer feature with ringing tones or melody played at the call incoming tone playing on SMS incoming or simply playing a tone or melody when needed by your application ao Q102 SS BZ101 ad z u S AN 30T 23 SMUS 1 227 Be SMBT2907A 3 1 3 A 2 C116 Se i geg D101 bes MCL4148 JC shior 2 pE BCR Lara A Em SOT 323 x a woe dr cyt 1 A sample interface scheme is included below to give you an idea of how to interface a Buzzer to the GPIO7 NOTE To correctly drive a buzzer a driver must be provided its characteristics depend on the Buzzer and for them refer to your buzzer vendor lt g Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 44 of 51 Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 11 6 Indication of network service availability The STAT_LED pin status shows information on the network service availability and Call status In the UC864 E 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 Net search Not registered
11. 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 data feature of the Telit UC864 E then this noise is not so disturbing and power supply layout design can be more forgiving e The PCB traces to UC864 E and the Bypass capacitor must be big enough to ensure no significant voltage drops occur when the 2A current peaks are absorbed This is for the same reason as previous point Try to keep this trace as short as possible e The PCB traces connecting the Switching output to the inductor and the switching diode must be kept as short as possible by placing the inductor and the diode very close to the power switching IC only for switching power supply This is done in order to reduce the radiated field noise at the switching frequency 100 500 usually e The use of a good common ground plane is suggested e The placement of the power supply on the board should be done in such a way to guarantee that the high current return paths in the ground plane are not overlapped to any noise sensitive circuitry as the microphone amplifier ouffer or earphone amplifier e The power supply input cables should be kept separate from noise sensitive lines such as microphone earphone cables Kag T at Zi Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 25 of 51 L e Telit UC8
12. rates on RS232 The RS232 serial port lines are usually connected to a DB9 connector with the following layout OCD_AS232 _ SCH DSR RS232 ZAC TX A5232 C v ATS_RS232 lt _ y gt N Y LA CTS_AS232 gt DTR AS232 lt d RI RS22 ik H e D Le Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 34 of 51 Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 5V UART level translation If the OEM application uses a microcontroller with a serial port UART that works at a voltage different from 2 6 2 9V then a circuitry has to be provided to adapt the different levels of the two sets of signals As for the RS232 translation there are a multitude of single chip translators For example a possible translator circuit fora 5V TRANSMITTER RECEIVER can be a TCTWZ34EK TN Dy T40 2 DV GND TO OEN HARDWARE ek East SE MODULE Hat Dy AxD_2 AY TOFS4O7AFE GMO TIP This logic IC for the level translator and 2 6V pull ups not the 5V one can be powered directly from PWRMON D line of UC864 E Note that the TC7SZ07AE has open drain output therefore the resistor R2 is mandatory 16 3 e A G eeh EA a Sede Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 35 of 51 e Telit UC864 E Hardware User Guide 1vv0
13. the other lines are unused All applicator shall include in their design such a way of reprogramming UC864 E page 32 of 51 An example of level translation circuitry of this kind is RS232 Outputs from UC864 Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 RS232 Outputs RS232 Inputs to UC864 Vin Lg 14 sooo ONLINE Logic Level Select lt ROUT lt i Sexo 13 16 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 Reproduction ep without Telit Communications S p A written authorization All Rights SZ page 33 of 51 Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 Second solution could be done using a MAXIM transceiver MAX218 In this case the compliance with RS232 5V is possible aa VA m 2 8 gt I ON OFF UC864 RS232 UC864 RS232 ENABLE Another level adapting method could be done using a standard RS232 Transceiver MAX3237EAI adding some resistors to adapt the levels on the UC864 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
14. 0603 10X16 0805 D QD R212 Bes 5 0603 E COG R207 50v 4 7K 0603 0603 EF D SWITCHING REGULATOR W Le g E Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 21 of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 5 2 1 3 Battery Source Power Supply Design Guidelines e The desired nominal output for the power supply is 3 8V and the maximum voltage allowed is 4 2V hence a single 3 7V Li lon cell battery type is suited for supplying the power to the Telit UC864 E module e The three cells Ni Cd or Ni MH 3 6 V Nom battery types or 4V PB types MUST NOT BE DIRECTLY USED since their maximum voltage can rise over the absolute maximum voltage for UC864 E and damage it NOTE DON T USE any Ni Cd Ni MH and Pb battery types directly connected with UC864 E Their use can lead to overvoltage on UC864 E and damage it USE ONLY Li lon battery types e A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks a 100uF tantalum capacitor is usually suited e Make sure the low ESR capacitor usually a tantalum one is rated at least 10V e A protection diode should be inserted close to the power input in order to save UC864 E from power polarity inversion Otherwise the battery connector should be done in a way to avoid polarity inversions when connecting the battery e The battery cap
15. 300766a Rev 1 31 01 08 NOTE The UART input line TXD rx_uart of UC864 E is NOT internally pulled up with a resistor so there may be the need to place an external 47KQ pull up resistor either the DTR dtr_uart and RTS rts_uart input lines are not pulled up internally so an external pull up resistor of 47KQ may be required A power source of the internal interface voltage corresponding to the 2 6V CMOS high level is available at the PWRMON pin on the connector whose absolute maximum output current is 1mA A maximum of 9 resistors of 47 kO pull up can be connected to the PWRMON pin provided no other devices are connected to it and the pulled up lines are UC864 E input lines connected to open collector outputs in order to avoid latch up problems on UC864 E Care must be taken to avoid latch up on UC864 E and the use of this output line to power electronic devices shall be avoided especially for devices that generate spikes and noise such as switching level translators micro controllers failure in any of these condition can severely compromise the UC864 E functionality NOTE The input lines working at 2 6VCMOS can be pulled up with 47KQ resistors that can be connected directly to the PWRMON line provided they are connected as in this example NO OTHER devices than those suggested should be powered with the PWRMON line otherwise the module functionality may be compromised It is important to consider that the added circuit mu
16. 38 page 3 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 10 3 SNC UCU cds coca cca ssa de cee ace eect eects 38 10 4 Electrical Characteristics cusses acc atecs scecestenatccsetcenativepeincaeieasiieaetiadeast scuacaatanceestincaeiaecusnceuss 39 10 4 1 Input lines microphone cee ceeeceeeeececeeeeeeeeeceeeeceaaececaeeceaeeeceaeeesaaeceeeeeseaeeeseaeeseaeeseceeeseanenieeeeaes 39 10 4 2 Output lines speaker oo eeeeeecececeeeceeeeeceeeeeceaeeecaaeeseeeeceaeeecaaeeesaaeeseaeeeseaeeesaesseeeeseieeesseessieeeeaes 40 11 General Purpose tee eege eege 41 11 1 Logic level specifications asics sitecsicecsnannents casas eates en cnets cesta se necennaeannae cena eseancesateeneadsasntensineains 42 11 2 Using a GPIO Pad as INPUT E 43 11 3 Using a GPIO Pad as OUTPUT nnssnannennnnnnnnnnnnnnnnnnnnnnnnnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn 43 11 4 Using the Alarm Output GRIOG nnssaannennunnnnunnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn nnmnnn 43 11 5 Using the Buzzer Output GI asicaisicsiscescescntecccestieccenteeanccentieaseseadenecneceacenncncenaeanncanennaccncee 44 11 6 Indication of network service availabiltty sseEEEEEEERKREERREEEEEEEEERRREERREEEEEEEEEERREEERREEEEEEEEEn 45 11 7 RFO E TE 46 11 8 VAUX POW CU TT 46 11 9 Mounting UC864 E on your DOaMC ccecceeseeeeeeeseeeeeeeeenneeeeeeseeneeeeesseeeeeeenseeeeseeseeneeeeseneeees 47 11 9 1 Debug of the UC864
17. 4 of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 5 2 3 Power Supply PCB layout Guidelines As seen on the electrical design guidelines the power supply shall have a low ESR capacitor on the output to cut the current peaks and a protection diode on the input to protect the supply from spikes and polarity inversion The placement of these components is crucial for the correct working of the circuitry A misplaced component can be useless or can even decrease the power supply performances e The Bypass low ESR capacitor must be placed close to the Telit UC864 E power input pads or in the case of a switching power supply it can be placed close to the inductor to cut the ripple provided the PCB trace from the capacitor to UC864 E is wide enough to ensure a drop less connection even during the 2A current peaks e The protection diode must be placed close to the input connector where the power source is drained e The PCB traces from the input connector to the power regulator IC must be wide enough to ensure no voltage drops occur when the 2A current peaks are absorbed Note that this is not made in order to save power loss but especially to 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 frequency For this reason while a voltage drop of 300 400 mV may be acceptable from the
18. 64 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 6 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 6 1 Antenna Requirements As suggested on the Product Description the antenna for a Telit UC864 E 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 amp 140 MHz PCS 250 MHz in WCDMA2100 band Gain Gain lt 3dBi Impedance 50 ohm Input power gt 33dBm 2 W peak power in GSM gt 24dBm Average power in WCDMA2100 VSWR absolute max lt 10 1 VSWR lt 2 1 recommended Furthermore if the device is developed for the US market and or Canada market it shall comply with the FCC and or IC approval requirements This device is to be used only for mobile and fixed applications The antenna s used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co located or operating in conjunction with any other antenna or transmitter End Users must be provided with transmitter operation conditions for satisfying RF exposure complianc
19. AR_HF AO Hands free ear output phase Audio 10 EAR_HF AO Hands free ear output phase Audio 11 EAR Mit AO Handset earphone signal output phase Audio 12 EAR_MT AO Handset earphone signal output phase Audio 13 MIC_HF Al Hands free microphone input phase Audio 14 MIC_HF Al Hands free microphone input phase Audio 15 MIC_MT Al Handset microphone signal input phase Audio 16 MIC_MT Al Handset microphone signal input phase Audio SIM Card Interface 18 SIMVCC External SIM signal Power supply for the SIM 1 8 3V 19 SIMRST O External SIM signal Reset 1 8 3V 20 SIMIO I O External SIM signal Data I O 1 8 3V 21 SIMIN External SIM signal Presence active low 47KQ 1 8 3V 22 SIMCLK O External SIM signal Clock 1 8 3V Trace On this line a maximum of 10nF bypass capacitor is allowed page 8 of 51 Pin 23 24 25 26 27 28 29 30 31 32 35 36 37 38 39 40 45 46 48 49 50 51 52 53 54 55 56 57 58 59 60 Signal RX_TRACE TX_TRACE C103 TXD C104 RXD C107 DSR C106 CTS C108 DTR C125 RING C105 RTS C109 DCD USB_ID PCM_CLOCK ADC_IN1 ADC_IN2 ADC_IN3 DAC_OUT STAT_LED GND USB_VBUS PWRMON VAUX1 CHARGE CHARGE ON OFF RESET VRTC TGPIO_19 TGPIO_11 TGPIO_20 TGPIO_04 TGPIO_14 UO Al UO Al Al Al AO Al AO Al Al AO UO UO UO UO UO Function RX Data for debug monitor TX Data for debug monitor Prog
20. C47 Part 15 To meet the FCC s RF exposure rules and regulations 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 The system antenna s used for this module must not exceed 3 dBi 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 tested and approved for FCC compliance L lt e Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 49 of 51 ae O ag e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 13 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 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 us
21. CMOS it can be buffered with an open collector transistor provided a 47KO pull up resistor is connected as seen in the paragraph 0 11 3 Using a GPIO Pad as OUTPUT The GPIO pads when used as outputs can drive 2 6V 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 Alarm Output GPIO6 The GPIO6 pad when configured as Alarm Output is controlled by the UC864 E module and will rise when the alarm starts and fall after the issue of a dedicated AT command This output can be used to power up the UC864 E controlling microcontroller or application at the alarm time giving you the possibility to program a timely system wake up to achieve some periodic actions and completely turn off either the application and the UC864 E during sleep periods dramatically reducing the sleep consumption to few pA In battery powered devices this feature will greatly improve the autonomy of the device O NOTE During RESET the line is set to HIGH logic level G d SN T n nate A E a E CD E en zaku D e e Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 43 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 11 5 Using the Buzzer Output GPIO7 The GPIO7 pad when configured as Buzzer Output is controlled by the UC864 E module and will
22. DLE mode Stand by mode no call in progress AT CFUN 1 21 7 Normal mode full functionality of the module MF 9 S Disabled TX and RX module is not registered on the AT CFUN 4 21 3 GEN Power saving CFUN 0 module registered on the network and can receive voice call or an SMS but it is not possible AT CFUN 0 or 3 3 to send AT commands module wakes up with an unsolicited code call or SMS or rising RTS line CFUN 5 AT CFUN 5 full functionality with power saving module registered on the network can receive incoming calls and SMS MF 2 GSM TX and RX mode Min power level 139 1 GSM Sending data mode Max power level 340 8 GPRS class 10 TX and RX mode Max power level 728 2 GPRS Sending data mode 3 slot TX WCDMA Max power level 619 7 WCDMA Call in progress In GSM GPRS mode RF transmission is not continuous and 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 voltage drops this means that both the electrical design and the board layout must be designed for this current flow page 17 of 51 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved p Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 If the layout of the PCB is not well designed a strong noise floor is generat
23. Data Hw Flow Control Serial data input TXD from DTE Serial data output to DTE Output for Data set ready signal DSR to DTE Output for Clear to send signal CTS to DTE Input for Data terminal ready signal DTR from DTE Output for Ring indicator signal RI to DTE Input for Request to send signal RTS from DTE Output for Data carrier detect signal DCD to DTE Miscellaneous Functions Analog input used to sense whether a peripheral device is connected and determine the peripheral type a host or a peripheral PCM clock out DAC and ADC Analog Digital converter input Analog Digital converter input Analog Digital converter input Digital Analog converter output Miscellaneous Functions Status indicator led Ground Power supply for the internal USB transceiver This pin is configured as an analog input or an analog output depending upon the type of peripheral device connected Power ON Monitor Power output for external accessories Charger input Charger input Input command for switching power ON or OFF toggle command Reset input VRTC Backup capacitor Telit GPIOs Telit GPIO19 Configurable GPIO Telit GPIO11 Configurable GPIO Telit GPIO20 Configurable GPIO Telit GPIO4 Configurable GPIO Telit GPIO14 Configurable GPIO e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 Internal Pull up Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved Type
24. E 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 requirements of the R amp TTE Directive Articles 3 1 a and b safety and EMC respectively and any relevant Article 3 3 requirements The UC864 E module is conforming to 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 UC864 E module is compliant with the following standards e 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 this document and the Hardware User Guide Software User Guide all the information you may need for developing a product meeting the R amp TTE Directive is included The UC864 E module is conforming to the following US Directives e Use of RF Spectrum Standards FCC 47 Part 24 GSM 1900 e EMC Electromagnetic Compatibility Standards FC
25. Molex board to board connector and the pin 1 are shown in the following picture 26 5540 15 8 0 15 UH N MOVABLE RF T ray S 9 21 F J N dei KE Ke be 3 NOTE metal tabs present on UC864 E should be connected to GND Reproduction forbidden without Telit Communications S p A written authorization All Rights A page 47 of 51 Tel it UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 11 9 1 Debug of the UC864 E in production To test and debug the mounting of the UC864 E we strongly recommend to foreseen test pads on the host PCB in order to check the connection between the UC864 E 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_TRACE RX_TRACE PWRMON USB D USB D USB V_BUS USB _ID Reproduction forbidden without Telit Communications S p A written authorization All Rights h page 48 of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 12 Conformity Assessment Issues The UC864 E module is assessed to be conforming to the R amp TTE Directive as stand alone products so if the module is installed in conformance with Dai Telecom installation instructions require no further evaluation under Article 3 2 of the R amp TT
26. OO7 Configurable GPIO CMOS2 6V 1uA 1mA pull down function BUZZER 67 TGPIO_08 I O GPIO08 Configurable GPIO CMOS 2 6V 1uA 1mA pull down 76 TGPIO_09 I O GPIOO09 Configurable GPIO CMOS2 6V 1uA 1mA pull up 63 TGPIO_10 I O GPIO10 Configurable GPIO CMOS 2 6V 1uA 1mA pull down 57 TGPIO_11 UO GPIO11 Configurable GPIO CMOS 2 6V 1uA 1mA pull down 62 TGPIO_12 I O GPIO12 Configurable GPIO CMOS 2 6V 1uA 1mA pull up 77 TGPIO_13 I O GPIO13 Configurable GPIO CMOS 2 6V 1uA 1mA pull down 60 TGPIO_14 I O GPIO14 Configurable GPIO CMOS 2 6V 1uA 1mA pull up 61 TGPIO_15 I O GPIO15 Configurable GPIO CMOS 2 6V 1uA 1mA pull up 75 TGPIO_16 I O GPIO16 Configurable GPIO CMOS 2 6V 1uA 1mA pull up 71 TGPIO_17 I O GPIO17 Configurable GPIO CMOS 2 6V 1uA 1mA pull down 65 TGPIO_18 I O GPIO18 Configurable GPIO CMOS 2 6V 1uA 1mA pull down 56 TGPIO_19 I O GPIO19 Configurable GPIO CMOS 2 6V 1uA 1mA 58 TGPIO_20 I O GPIO20 Configurable GPIO CMOS 2 6V 1uA 1mA 72 TGPIO_21 I O GPIO21 Configurable GPIO CMOS 2 6V 1uA 1mA pull up CMOS 1 8V 64 TGPIO_22 I O GPIO22 Configurable GPIO not 2 6V uA imA pull up page 41 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 Not all GPIO pads support all these three modes e GPIO5 supports all three modes and can be input output RFTX monitor output Alternate function e GPIO6 supports all three modes and can be input output alarm output Alternate function e GPIO7 supports all three modes
27. acity must be at least 500mAh in order to withstand the current peaks of 2A the suggested capacity is from 500mAh to 1000mAh 5 2 1 4 Battery Charge control Circuitry Design Guidelines The charging process for Li lon Batteries can be divided into 4 phases e Qualification and trickle charging e Fast charge 1 constant current e Final charge constant voltage e Maintenance charge The qualification process consists in a battery voltage measure indicating roughly its charge status If the battery is deeply discharged that means its voltage is lower than the trickle charging threshold then the charge must start slowly possibly with a current limited pre charging process keeping the current very low respect to the fast charge value the trickle charging During the trickle charging the voltage across the battery terminals rises when it reaches the fast charge threshold level the charging process goes into fast charge phase During the fast charge phase the process proceeds with a current limited charging this current limit depends the complete charge required time and from the battery pack capacity During this phase the voltage across the battery terminals still raises but at a lower rate Once the battery voltage reaches its maximum voltage then the process goes into its third state Final charging The voltage measure to change the process status into final charge is very important It must be ensured that the maximum battery voltage is nev
28. ame that ends with a or with a bar over the name NOTE UC864 E turns fully on also by supplying power to the Charge pad provided there s a battery on the VBATT pads Za Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 For example 1 Let s assume you need to drive the ON pad with a totem pole output of a 1 8 5 V microcontroller uP_OUT1 2 Let s assume you need to drive the ON pad directly with an ON OFF button Q2 uP_ouT1 O E BC847BW S0T 323 1Fs 1 8 5V ______ eee L Is Power ON OFF ingulse GND SW 4 SE e Kb On 3 4 page 13 of 51 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 4 2 Turning OFF the UC864 E The turning off of the device can be done in three ways e By software command see UC864 E 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 UC864 E first you MUST cut off supplying power to the USB_VBUS pin then the pad ON must
29. application of the device must comply with the safety standards of the applicable country and where applicable with the relevant wiring rules Telit reserves the right to make modifications additions and deletions to this document due to typographical errors inaccurate information or improvements to programs and or equipment at any time and without notice Such changes will nevertheless be incorporated into new editions of this application note All rights reserved 2007 2008 Telit Communications S p A o_o Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 5 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 1 Overview The aim of this document is the description of some hardware solutions useful for developing a product with the Telit UC864 E module In this document all the basic functions of a mobile phone 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 pr
30. around 150mA For these reasons the thermal design is rarely a concern and the simple ground plane where the power supply chip is placed can be enough to ensure a good thermal condition and avoid overheating For the heat generated by the UC864 E you can consider it to be during transmission 1W max during CSD VOICE calls and 2W max during class12 GPRS upload This generated heat will be mostly conducted to the ground plane under the UC864 E you must ensure that your application can dissipate it In the WCDMA mode since UC864 E emits RF signals continuously during WCDMA transmission you should pay special attention on how to dissipate the heat generated The current consumption will be up to about 620mA continuously at the maximum TX output power 24dBm Thus you should arrange the PCB area as large as possible under UC864 E which you will mount You can mount UC864 E on the large ground area of your application board and make many ground vias for heat sink The peak current consumption in the GSM mode is higher than that in WCDMA However considering the heat sink is more important with WCDMA As mentioned before GSM signal is bursty Thus the temperature drift is more insensible than WCDMA Consequently if you prescribe the heat dissipation in the WCDMA mode you don t need to think more about the GSM mode n lt n Ags Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 2
31. art up It may only be used to reset a device already on that is not responding to any command NOTE do not use this signal to turn off the UC864 E Use the ON OFF signal to perform this function or the ATHSHDN command Reset Signal Operating levels Signal Min Max RESET Input high 2 0V 2 2V RESET Input low OV 0 2V This signal is internally pulled up so the pin can be left floating if not used If unused this signal may be left unconnected If used then it must always be connected with an open collector transistor to permit to the internal circuitry the power on reset and under voltage lockout functions PAS E a EMA F Sta an gi d aT hb Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 29 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 8 Serial Ports The serial port on the Telit UC864 E is the interface between the module and OEM hardware 2 serial ports are available on the module e MODEM SERIAL PORT e MODEM SERIAL PORT 2 DEBUG 8 1 MODEM SERIAL PORT 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 6V 3V Universal Asynchronous Receive Transmit e microcontroller UART 5V or other voltages different from 2 8V Depending from the type of serial port on the OEM hardware a level translator circ
32. ates the dsr_uart module is ready 7 RTS 31 Request to Send Input to the UC864 E that controls the rts_uart Hardware flow control 8 CTS 28 Clear to Send Output from the UC864 E that controls the cts_uart Hardware flow control 9 RI 30 Ring Indicator Output from the UC864 E that indicates the ri_uart incoming call condition NOTE According to V 24 RX TX signal names are referred to the application side therefore on the UC864 E side these signal are on the opposite direction TXD on the application side will be connected to the receive line here named TXD rx_uart of the UC864 E serial port and vice versa for RX D TIP For a minimum implementation only the TXD and RXD lines can be connected the other lines can be left open provided a software flow control is implemented page 31 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 8 2 RS232 level translation In order to interface the Telit UC864 E with a PC com port or a RS232 EIA TIA 232 application a level translator is required This level translator must Invert the electrical signal in both directions Translate the level from 0 2 6V to 15 15V Actually the RS232 UART 16450 16550 16650 amp 16750 chipsets accept signals with lower levels on the RS232 side EIA TIA 562 allowing for a lower voltage multiplying ratio on the level translator Note that the negative signal voltage must be less than OV and hence some sort of level
33. c signals and the Software identifiers with the following meaning D HS or MT gt internal audio transducers from HandSet or MicroTelephone D HF gt external audio transducers from HandsFree We have not changed the HS and HF acronyms with UC864 E keeping them both in the Software and on the schematics But we want you to remember that if you don t have any load driving constraint like a speaker with an impedance coil lower than 160 this distinction is not relevant because the two sections e have fully equivalent electrical performances like the two microphone amplifiers activate the same functionalities like the Echo Canceller module D offer slightly different performances like the two speaker buffering stages Being the performances of the two blocks like the same in this case the choice could be done as example in order to overcome the PCB design difficulties respecting the electrical characteristics 10 3 Selection The activation of the requested audio section is made Hardware by AXE line or Software by ATHCAP command turning on e an output stage to drive a low resistive load earpiece and an input stage to drive the local microphone when AUDIO 1 mode HS MT e an output stage to drive a high resistive load headset and an input stage to drive the headset microphone when AUDIO 2 mode HF page 38 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 10 4 Electrical Characteri
34. e OEM integrators must ensure that the end user has no manual instructions to remove or install the UC864 E module Antennas used for this OEM module must not exceed 3dBi gain for mobile and fixed operating configurations ol Ka ep H ZE P s Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 26 of 51 Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 6 2 Antenna Installation Guidelines e Install the antenna in a place covered by the GSM WCDMA signal e The Antenna must be installed to provide a separation distance of at least 20 cm from all persons and must not be co located or operating in conjunction with any other antenna or transmitter e Antenna shall not be installed inside metal cases e Antenna shall be installed also according Antenna manufacturer instructions lt 2 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 27 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 7 Logic level specifications Where not specifically stated all the interface circuits work at 2 6V CMOS logic levels The following table shows the logic level specifications used in the Telit UC864 E interface circuits For 2 6V CMOS signals Absolute Maximum Ratings Not Functional UC864 E arameter Min Max Input level on any 0 3V 3 0V digital pin
35. e 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 n L lt e Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 50 of 51 ai s feo Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 14 Document Change Log Revision Date Changes Rev 0 23 10 2007 Initial release Rev 1 31 01 2008 3 1 Pin 33 and 34 now Reserved 11 8 VAUX is OFF during RESET and Power On period Added table with power consumptions and Supply voltage range i Za Reproduction forbidde eo n without Telit Communications S p A written authorization All Rights Reserved page 51 of 51
36. e up to 15 8V and this should be kept in mind when choosing components all components in the power supply must withstand this voltage The same consideration has to be applied to the voltage peaks that in a Car Application could rise to 100V e A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks a 100uF tantalum capacitor is usually suited e Make sure the low ESR capacitor on the power supply output usually a tantalum one is rated at least 10V e A spike protection diode should be inserted close to the power input for Car applications in order to clean the supply from spikes e A protection diode should be inserted close to the power input in order to save UC864 E from power polarity inversion This can be the same diode as for spike protection Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 20 of 51 Ee e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 An example of switching regulator with 12V input is in the below schematic it is split in 2 parts 12 INPUT D To 5 SWITCHING N a vm v MF R110 JI C230 C232 D202 luF aN ds a a ase P6SMB30A 30A 100V 50V sos 1210 Pe Lee T7 T71 77 S R a D D D Ga x T202 ii be e RCR 110D 150 M 7 Es 3 1 2 T jne3 HL R210 C2353 C236 D203 ie ox 1000uF luF 220 xR STPS2L40U ie 16v 16V
37. ed on the ground and the supply this will reflect on all the audio paths producing an audible annoying noise at 216 Hz if the voltage drop during the peak current absorption is too much then the device may even shutdown as a consequence of the supply voltage drop TIP The electrical design for the Power supply should be made ensuring it will be capable of a peak current output of at least 2 A Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 18 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 5 2 General Design Rules The principal guidelines for the Power Supply Design embrace three different design steps e The electrical design e The thermal design e The PCB layout 5 2 1 Electrical Design Guidelines The electrical design of the power supply depends strongly from the power source where this power is drained We will distinguish them into three categories e 5V input typically PC internal regulator output e 12V input typically automotive e Battery 5 2 1 1 5V input Source Power Supply Design Guidelines e 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 e When using a linear regulator a proper heat sink shall be prov
38. edure Mh a A A Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 15 of 51 Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 For example 1 Let s assume you need to drive the RESET pad with a totem pole output of a 1 8 5 V micro controller uP_OUT2 gt RESET 10k or S 2 e UP_OUTe o BCa4 8W 2 501 323 Re Fs 1 8 5V ATK 4 DN 5h 0 26 0402 o vi CMD This signal is internally pulled up so the pin can be left floating if not used NOTE If UC864 E is connected as USB slave considering also the presence of VBATT supply when powered off it automatically switch on again Reproduction forbidden without Telit Communications S p A written authorization All Rights A page 16 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 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 5 1 Power Supply Requirements Nominal Supply Voltage 3 8V Max Supply Voltage 4 2 Supply Voltage Range 3 51 4 2 The UC864 E power consumptions are UC864 E GSM900 Mode Average mA Mode description I
39. er exceeded otherwise the battery may be damaged and even explode Moreover regarding the constant voltage final chargers the constant voltage phase final charge must not start before the battery voltage has reached its maximum value otherwise the battery capacity will be highly reduced The final charge is done using constant voltage page 22 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 The constant voltage charge proceeds with a fixed voltage regulator very accurately set to the maximum battery voltage and hence the current will decrease while the battery is becoming charged When the charging current falls below a certain fraction of the fast charge current value then the battery is considered fully charged the final charge stops and eventually starts the maintenance The last phase is not properly a charging phase since the battery at this point is fully charged and the process may stop after the final charge The maintenance charge provides an additional charging process to compensate for the typical Li lon battery charge leak It is done by issuing pulses with a fixed time length again few hundreds of ms and a duty cycle around 5 or less This last phase is not implemented in the UC864 E internal charging algorithm so that the battery once charged is left discharging down to a certain threshold so that it is cycled from full charge to slight discharge even if the battery charger is a
40. er 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 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 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 th
41. ere are slightly different electrical performances when the load is driven directly from the internal audio amplifiers due to differential output voltage Line coupling DC Line type Differential Output load resistance 32 0 Max Load capacitance 500pF max Differential output impedance 1 Q max 1 02KHz Signal bandwidth 150 4000 Hz 3 dB Differential output voltage 0dBm0 1 06 Vms typical Number of volume steps 10 Volume level step 2dB Table 3 Ear_MT Buffers Line coupling DC Line type Differential Output load resistance 32 Q Max load capacitance 500pF max Differential output resistance 1 QO max 1 02KHz Signal bandwidth 150 4000 Hz 3 dB Differential output voltage 0dBm0 833MV ms typical Number of volume steps 10 SW Volume level step 2dB Table 4 Ear_HF Buffers We suggest to drive the load differentially from both receive drivers thus the output swing is doubled and the need for the output coupling capacitor is eliminated However for particular OEM application needs also a Single Ended circuitry can be implemented but reducing by four the output power The OEM circuitry shall be designed to reduce the common mode noise typically generated on the ground plane and to get the maximum power output from the device low traces resistance Audio amplifiers could be design in two configurations balanced or differential and unbalanced or single ended The differential output power am
42. i e fei wireless solutions UC864 Hardware User Guide 1vv0300766a_ Rev 1 31 01 08 Making machines talk Ee e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 This document is relating to the following products UMTSIHSDPA 2 I HSDPA 7 2 UC864 E 3990250694 Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 2 of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 Contents Be e TEE 6 2 i Me ChaniGal DIM nSi NSississrarssnunnii unian nananana anaana tanadan danian iaaa diaaa anaa 7 3 UC864 E module Connections ee EE EE EE EEn 8 Ch WE 2 e TN GE 8 3 1 1 UC864 E Antenna Connecht tt tn trett EEEE EAAS AN SEENE EAES EEEE EEEEEAES AENEA EEEE Enae EEEE 11 A Hardware Commands eines ENEE EE EE 12 4 1 Turning ON the UC864 E sssini inian cc ticcsesttecceenenceeatacineteeanstacecaptaceecteeeancsenencteneeeeccteneaenneete 12 42 T rning OFF the UC8O4 E E 14 4 2 1 Hardware Shutdown iis siete sana dees el a a aan aa a a a aa a ees 14 4 2 2 Hardware Unconditional Restart 15 5 P Wwer SUP e UE 17 5 1 Power Supply Requirements esssuasressuuegSEEEEARSESEEVENSEEE ENEE EEEESEEEEEEEEEE NENNEN 17 5 2 Genetal Design R leS assgsss ssesgreessessseesesgsrsesrunerEegeeusEekeEESRSSEER SE raain CERS 19 5 2 1 Electrical Designi GuidGl ine gie eege gedd E 19 5 2 1 1 5V input Source Power Supply Design Guidelines
43. ided in order to dissipate the power generated e A Bypass low ESR capacitor of adequate capacity must be provided in order to cut the current absorption peaks close to UC864 E a 100uUF tantalum capacitor is usually suited e Make sure the low ESR capacitor on the power supply output usually a tantalum one is rated at least 10V e A protection diode should be inserted close to the power input in order to save the electrical circuit from power polarity inversion Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 19 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 An example of linear regulator with 5V input is 5V input linear regulator U201 LT152BCQ 3 8V Out 5 2 1 2 12V input Source Power Supply Design Guidelines e The desired output for the power supply is 3 8V hence due to the big difference between the input source and the desired output a linear regulator is not suited and shall not be used A switching power supply will be preferable because of its better efficiency especially with the 2A peak current load represented by UC864 E e When using a switching regulator 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 e For car Pb battery the input voltage can ris
44. le However no responsibility is assumed by Telit Communications 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 Communications S p A other than for circuitry embodied in Telit products This document is subject to change without notice page 6 of 51 Le e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 2 Mechanical Dimensions The Telit UC864 E module overall dimensions are e Length 36 2 mm e Width 30 mm e Thickness 4 8mm 249 05 z i pS KA 1 6549 05 17 427805 36 720 05 TE el e Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 7 of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 3 UC864 E module connections 3 1 PIN OUT UC864 E uses an 80 pin Molex p n 53949 0878 male connector for the connections with the external applications This connector matches the 54150 0878 models Pin Signal O Function Gen e foes Power Supply 1 VBATT Main power supply Power 2 VBATT Main power supply Power 3 VBATT Main power supply Power 4 VBATT Main power supply Power 5 GND Ground Power 6 GND Ground Power 7 GND Ground Power Audio 8 AXE Hands free switching 100KQ CMOS 2 6V E
45. lways inserted This guarantees that anyway the remaining charge in the battery is a good percentage and that the battery is not damaged by keeping it always fully charged Li lon rechargeable battery usually deteriorates when kept fully charged Last but not least in some applications it is highly desired that the charging process restarts when the battery is discharged and its voltage drops below a certain threshold UC864 E internal charger does it As you can see the charging process is not a trivial task to be done moreover all these operations should start only if battery temperature is inside a charging range usually 5 C 45 C In order to satisfy this last requirement the UC864 E measures the temperature of its internal components even if it is not exactly the same as the battery temperature but in common application the two temperatures should not differ too much and the charging temperature range should be guaranteed NOTE All voltage thresholds are provided inside UC864 E in order to maximize Li lon battery performances and do not need to be changed NOTE In this application the battery charger input current must be limited to less than 400mA This can be done by using a current limited wall adapter as the power source NOTE When starting the charger from Module powered off the startup will be in CFUN4 to activate the normal mode the command AT CFUN 1 has to be provided Reproduction forbidden without
46. oduct with the Telit UC864 E module For further hardware details that may not be explained in this document refer to the Telit UC864 E Product Description document where all the hardware information is reported NOTICE EN The integration of the GSM GPRS EGPRS WCDMA HSDPA UC864 E 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 EGPRS WCDMA HSDPA_ UC864 E all interno dell applicazione dell utente dovra rispettare le indicazioni progettuali descritte in questo manuale DE Die integration des UC864 E GSM GPRS EGPRS WCDMA HSDPA Mobilfunk Moduls in ein Ger t mu gem der in diesem Dokument beschriebenen Kunstruktionsregeln erfolgen SL Integracija GSM GPRS EGPRS WCDMA HSDPA UC864 E modula v uporabniski aplikaciji bo morala upo tevati projektna navodila opisana v tem pirocniku SP La utilizaci n del modulo GSM GPRS EGPRS WCDMA HSDPA UC864 E debe ser conforme a los usos para los cuales ha sido dese ado descritos en este manual del usuario FR L int gration du module cellulaire GSM GPRS EGPRS WCDMA HSDPA UC864 E dans l application de l utilisateur sera faite selon les r gles de conception d crites dans ce manuel HE 3505 onan Sy PVR TYAN nt Joona MUNII NPAT NR DU WPAN EEN inn DY UC864 E The information presented in this document is believed to be accurate and reliab
47. plifier configuration is also called BTL bridge tied load In the following a discussion about the use of the two input and output amplifier configurations will be dealt with Also calculation and circuit examples will be exhaustively performed page 40 of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 11 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 Input pads can only be read and report the digital value high or low present on the pad at the read time output pads can only be written or queried and set the value of the pad output an alternate function pad is internally controlled by the UC864 E firmware and acts depending on the function implemented The following GPIO are available on the UC864 E module Input Pin Signal 1 0 Function Type output ON_OFF Note current state 70 TGPIO_01 I O GPIO01 Configurable GPIO CMOS 2 6V 1uA 1mA pull up 74 TGPIO_02 I O GPIO02 Configurable GPIO CMOS 2 6V 1uA 1mA pull up 66 TGPIO_03 I O GPIO03 Configurable GPIO CMOS 2 6V 1uA 1mA pull down 59 TGPIO_04 I O GPIO04 Configurable GPIO CMOS 2 6V 1uA 1mA pull down Alternate 78 TGPIO_05 I O GPIO05 Configurable GPIO CMOS 2 6V 1uA 1mA pull down function RFTXMON Alternate 68 TGPIO_06 I O GPIO06 Configurable GPIO CMOS 2 6V 1uA 1mA pull up function ALARM Alternate 73 TGPIO_07 I O GPI
48. st have consumption lower than 1mA 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 b Bi H ei d Ss e R e Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 36 of 51 9 USB Port L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 UC864 E includes an integrated universal serial bus USB transceiver compliant with USB 2 0 specification for interfacing UC864 E to a computer as a USB peripheral or connecting the UC864 E to other peripherals It supports the USB low speed 1 5 Mbits s and full speed 12 Mb s modes In HSDPA High Speed download Packet Access mode the downlink data speed rates up to 7 2Mbps Hence you need to interface UC864 E to your applications in full speed 12Mbits s mode You can use USB for the following purposes communication with external peripheral devices debug monitor USB Signal UC864 E Pin No Pad No 1 USB_VBUS 48 2 USB_D 80 3 USB D 79 4 USB_ID 35 Usage Power supply for the internal USB transceiver This pin is configured as an analog input or an analog output depending upon the type of peripheral device connected Minus line of the differential bi directional USB signal to from the peripheral device Plus line of the differen
49. stics 10 4 1 Input lines microphone The two transmit blocks are fully equivalent connected in Differential mode Line coupling AC Line type Balanced Coupling capacitor 2 100nF Differential input resistance 20kO Differential input voltage lt 1 03Vpp HSMicG 0dB Table 1 Mic_MT 1st differential microphone path Line coupling AC Line type Balanced Coupling capacitor 2 100nF Differential input resistance 20kO Differential input voltage lt 1 03V HFMicG 0dB Table 2 Mic_HF 2nd differential microphone path Due to the fact that particular OEM applications need a single line connection a Single Ended configuration could be implemented but halving the useful microphone signal In both cases the OEM circuitries shall be carefully designed to reduce the common mode noise typically generated on the ground plane WARNING In the previous tables the line coupling definition AC means that the signals from microphone must be connected to the input lines of the UC864 E through CAPACITORS not less than 100nF Not respecting this constraint the input stage will be damaged Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 39 of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 10 4 2 Output lines Speaker During designing remember that while no difference could be if the amplifiers drive an external amplifier th
50. tial bi directional USB signal to from the peripheral device Analog input used to sense whether a peripheral device is connected and determine the peripheral type a host or a slave NOTE the UC864 E is turned fully on also by connecting the module s USB port as slave considering also the presence of VBATT supply 9 1 Communication ports combinations The following port combinations are available on the UC864 E module e UART AT command USB DATA TRACE e USB AT command USB DATA TRACE Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 10 Audio Section Overview 10 1 Generality The UC864 E Audio Section provides two audio paths both in transmit and in receive sections active only one at time Two buffering amplifiers could be used in Differential or Single Ended configuration To select the well suited section refer to paragraph 10 3 Selection mode For applications and suggestion refer to the Telit modules Audio Application Note G 0000NT10007a 10 2 Definitions The Baseband chip was developed for the cellular phones which needed a couple of amplifiers to be used with internal audio transducers and another couple to be used with external ones both in transmit and in receive sections Two different definitions were introduced to distinguish the schemati
51. translation is always required The simplest 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 driver and receiver 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 6V UART level to the RS232 level while the receiver is the translator from RS232 level to 0 2 6V UART In order to translate the whole set of control lines of the UART you will need e 5drivers e 3 receivers NOTE The digital input lines working at 2 6V CMOS have an absolute maximum input voltage of 3 0V therefore the level translator IC shall not be powered by the 3 8V supply of the module Instead it shall be powered from a 2 6V 2 9 dedicated power supply This is because in this way the level translator IC outputs on the module side i e UC864 E inputs will work at 3 8V interface levels stressing the module inputs at its maximum input voltage NOTE In order to be able to do in circuit reprogramming of the UC864 E firmware the serial port on the Telit UC864 E shall be available for translation into RS232 and either it s controlling device shall be placed into tristate disconnected or as a gateway for the serial data when module reprogramming occurs Only RXD TXD GND and the On off module turn on pad are required to the reprogramming of the module
52. uit may be needed to make the system work The only configuration that doesn t need a level translation is the 2 6V UART The serial port on UC864 E is a 2 6V UART with all the 7 RS232 signals It differs from the PC RS232 in the signal polarity RS232 is reversed and levels The levels for UC864 E UART are the CMOS levels Absolute Maximum Ratings Not Functional UC864 E Parameter Min Max Input level on any 0 3V 3 0V digital pin when on Input voltage on 0 3V 3 0 V analog pins when on Operating Range Interface levels UC864 E Level Min Max Input high level 2 0V 2 9V Input low level 0 3V 0 6V Output high level 2 2V 2 6V Output low level OV 0 35V PAS E a EMA F Sta an gi d aT hb Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 30 of 51 e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 The signals of the UC864 E serial port are RS232 UC864 E Pin Signal Pad Name Usage Number Number 1 DCD 32 Data Carrier Detect Output from the UC864 E that indicates the dcd_uart carrier presence 2 RXD 26 Transmit line see Note Output transmit line of UC864 E UART tx_uart 3 TXD 25 Receive line see Note Input receive of the UC864 E UART rx_uart 4 DTR 29 Data Terminal Ready Input to the UC864 E that controls the DTE dtr_uart READY condition 5 GND 5 6 7 Ground Ground 6 DSR 27 Data Set Ready Output from the UC864 E that indic
53. when on Input voltage on 0 3V 3 0 V analog pins when on Operating Range Interface levels UC864 E Level gt Min Max Input high level 2 0V 2 9 V Input low level 0 3V 0 6V Output high level 2 2V 2 6V Output low level OV 0 35V For 1 8V signals Operating Range Interface levels 1 8V CMOS L UC864 E evel Min Max Input high level 1 5V 2 1V Input low level 0 3V 0 5V Output high level 1 4V 1 8V Output low level OV 0 35V ja T Reproduction forbidden without Telit Communications S p A written authorization All Rights Reserved page 28 of 51 L e Telit UC864 E Hardware User Guide 1vv0300766a Rev 1 31 01 08 7 1 Reset signal Signal Function UO PIN Number RESET Phone reset 54 RESET is used to reset the UC864 E module Whenever this signal is pulled low UC864 E is reset When the device is reset it stops any operation After the release of the reset UC864 E is unconditionally shut down without doing any detach operation from the network where it is registered This behavior is not a proper shut down because any device is requested to issue a detach request on turn off For this reason the Reset signal must not be used to normally 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 st
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