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This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged
without prior written agreement.

WM_PRJ_Q24NG_PTS_002-001 June

2006

3.3 Analog I/O implementation

3.3.1

Analog to Digital Converter (ADC) inputs

Two Analog to Digital Converters are available on the Q24NG sub-series:

•

The first one (AUXV0) is a general purpose converter,

•

The second one (BAT_TEMP) is used for battery temperature
monitoring.

These converters have a 10-bit resolution, ranging from 0 to 2.8 V.

Typical application:

GND

VCC

NTC

AUXV0

General
purpose

ADC input

GND

VCC

NTC

BAT_TEMP

Battery
temperature

monitoring

Figure 11: Example of ADC input implementation

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Содержание Wireless CPU Q24NG

Страница 1: ...WM_ Wireless CPU Q24NG Customer Design Guideline Revision 001 Date June 2006...

Страница 2: ...y of WAVECOM Not to be distributed or divulged without prior written agreement WM_PRJ_Q24NG_PTS_002 001 June 2006 Wireless CPU Q24NG Customer Design Guideline Reference WM_PRJ_Q24NG_PTS_002 Revision 0...

Страница 3: ...58 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WM_PRJ_Q24NG_PTS_002 001 June 2006 Document Information Level Date Hist...

Страница 4: ...EGSM 900 1800 850 1900 MHz version with 32 Mb of Flash memory and 16 Mb of PSRAM 32 16 T range 20 C 55 C Full ETSI specification Q24 Plus EGSM GPRS 900 1800 850 1900 MHz version with 32 Mb of Flash m...

Страница 5: ...documents 10 1 1 1 WAVECOM reference document 10 1 1 2 General reference document 10 1 2 List of abbreviations 11 2 General description 14 2 1 Overall dimensions 14 2 2 Power consumption 14 2 3 Capabi...

Страница 6: ...tation 30 3 3 1 Analog to Digital Converter ADC inputs 30 3 3 2 Audio interface 31 3 3 2 1 Microphone inputs 31 3 3 2 1 1 General 31 3 3 2 1 2 Recommended characteristics for the microphones 31 3 3 2...

Страница 7: ...ufacturing 48 6 3 Recommendation for lead free soldering 48 6 4 Power supply 48 6 5 Pads design 49 7 EMC recommendations 50 8 Firmware upgrade 51 8 1 Recommendations 51 8 2 Nominal upgrade procedure 5...

Страница 8: ...Figure 10 3 V 5 V SIM interface implementation example 29 Figure 11 Example of ADC input implementation 30 Figure 12 Microphone decoupling capacitor 31 Figure 13 Example of main microphone MIC2 implem...

Страница 9: ...clusive property of WAVECOM Not to be distributed or divulged without prior written agreement WM_PRJ_Q24NG_PTS_002 001 June 2006 Figure 29 Pads design 49 Figure 30 Example of serial link routing for d...

Страница 10: ...ed as is without any warranty of any kind whether express or implied General information about WAVECOM and its range of products is available at the following internet address http www wavecom com Tra...

Страница 11: ...e contrary to the general reference documents which are not WAVECOM owned 1 1 1 WAVECOM reference document 1 Automotive Environmental Control Plan for Wireless CPU Q24NG WM_PRJ_Q24NG_DCP_001 2 Environ...

Страница 12: ...etwork CB Cell Broadcast CEP Circular Error Probable CLK CLocK CMOS Complementary Metal Oxide Semiconductor CS Coding Scheme CTS Clear To Send DAC Digital to Analogue Converter dB Decibel DC Direct Cu...

Страница 13: ...Emitting Diode LNA Low Noise Amplifier MAX MAXimum MIC MICrophone MIN MINimum MMS Multimedia Message Service MO Mobile Originated MT Mobile Terminated na Not Applicable NF Noise Factor NMEA National...

Страница 14: ...ces RTS Request To Send RX Receive SCL Serial Clock SDA Serial Data SIM Subscriber Identification Wireless CPU SMS Short Message Service SPI Serial Peripheral Interface SPL Sound Pressure Level SPK SP...

Страница 15: ...3 Capability Real Time Clock with calendar RTC Battery charge management Echo Cancellation noise reduction Full GSM or GSM GPRS software stack Complete interfacing through a 60 pin connector o Power...

Страница 16: ...are advised to verify that the environmental specification of the SIM Card used is compliant with the Wireless CPU Q24NG environmental specifications 3 Wireless CPU Q24NG Product Technical Specificati...

Страница 17: ...straints The power supply is one of the key issues in the design of a GSM terminal Due to the bursted emission in GSM GPRS the power supply must be able to deliver high current peaks in a short time a...

Страница 18: ...e wireless CPU is supplied with a battery the total impedance battery contacts protections PCB should be 150 m to limit voltage drop out within emission burst Warning As the radio power amplifier is d...

Страница 19: ...d any phase error Insufficient power supply voltage could dramatically affect some RF performance factors TX power of course and modulation spectrum EMC performances spurious emission Emissions spectr...

Страница 20: ...battery cell the protection circuit impedance the packaging impedance contacts the PCB track impedance up to the Wireless CPU pin 3 1 2 4 External DC power supply The Q24NG may be connected to DC pow...

Страница 21: ...e error peak and power loss could occur 3 1 3 2 Application ground plane and shielding connection The grounding connection is done through the shielding the four legs have to be soldered to the ground...

Страница 22: ...peripheral implementation 3 2 1 Electrical information for digital I O All digital I O comply with 3Volts CMOS To interface the Q24NG digital signals with other logics 3 3 V logic some serial resistor...

Страница 23: ...2 2 2 I2 C The I2 C interface includes a CLK signal SCL and a DATA signal SDA complying with a standard 96 kHz interface The maximum transfer speed is 400 kbits s 3 2 3 SPI Auxiliary bus A second SPI...

Страница 24: ...Clear To Send output CT106 CTS Data Terminal Ready input CT108 2 DTR Data Set Ready output CT107 DSR Note the Q24NG is a DCE Data Communication Equipment The Q24NG sub series have been designed to al...

Страница 25: ...ectly the level shifter outputs Q24NG side or host processor outputs must be set at low level 0V or in high impedance Typical implementation with a terminal VCC 3V 3V 3V DCE DTE Resistor s Figure 6 Ex...

Страница 26: ...between application and a Q24NG mainly CT103 TX see Figure 6 Host output voltage UART baud rate 3 1V 3 2V 3 3V 9 600 R 62 k 6 8 k R 62 k 11 k R 62 k 19 200 R 30 k 6 8 k R 30 k 11 k R 30 k 38 400 R 15...

Страница 27: ...SIM socket in order to prevent any Electrostatic Discharge TVS diodes with low capacitance less than 10 pF have to be connected on SIM_CLK and SIM_DATA signals to avoid any disturbance of the rising...

Страница 28: ...onnector 10 cm maximum SIM socket connection SIM socket pin description Signal Pin number Description VCC 1 SIM_VCC RST 2 SIM_RST CLK 3 SIM_CLK CC4 4 VCC module GND 5 GROUND VPP 6 Not connected I O 7...

Страница 29: ...1 8 V and 3 V SIM cards using an external level shifter device see Figure below In this case depending on the type of SIM detected the module firmware triggers the GPO0 output signal pin 26 in order...

Страница 30: ...e 3 V and 5 V SIM cards using an external level shifter device see Figure below In this case depending on the type of SIM detected the module firmware triggers the GPO0 output signal pin 26 in order t...

Страница 31: ...Digital Converter ADC inputs Two Analog to Digital Converters are available on the Q24NG sub series The first one AUXV0 is a general purpose converter The second one BAT_TEMP is used for battery temp...

Страница 32: ...rnally subject to electrostatic discharge 3 3 2 1 Microphone inputs 3 3 2 1 1 General The MIC2 inputs already include the biasing for an electret microphone allowing an easy connection Warning The MIC...

Страница 33: ...C1 33 pF to 47 pF C2 C3 C4 47 pF to 100 pF L1 L2 100 nH C1 has to be as close as possible to the microphone Microphone manufacturers provide this capacitor directly soldered on the microphone C2 has...

Страница 34: ...0 to 330 R2 R3 usually between 1 k and 3 3 k as per the microphone characteristics C1 33 pF to 47 pF C2 C3 C4 47 F to 100 pF C5 47 F L1 L2 100 nH R1 and R4 are used as a voltage supply filter with C5...

Страница 35: ...30 R2 usually between 1 k and 3 3 k as per the VAUDIO voltage level and the microphone characteristics C1 10 pF to 33 pF C2 C3 C5 47 pF to 100 pF C4 47 F L1 L2 100 nH R1 is used as a voltage supply fi...

Страница 36: ...lding in order to avoid any disturbance on the audio path Speaker outputs SPK2 are push pull amplifiers and can be loaded down to 150 and up to 1 nF These outputs are differential and the output power...

Страница 37: ...iode against transient peak voltage must be connected as described below Typical implementation C1 D1 VBATT BUZ R1 Figure 18 Example of Buzzer implementation R1 must be chosen in order to limit the cu...

Страница 38: ...uses an interface which consists of a current source inputs CHG_IN where the constant current has to flow in order to charge the battery This current value depends on the battery capacity It is recomm...

Страница 39: ...o be chosen to have a RC filter with a time constant lower than 2 ms Calculation examples CTN 25 C 47 k CTN 55 C 10 k CTN 10 C 300 k CTN 10 C x VCC CTN 10 C R1 x BAT_TEMP full range R1 47 k BAT_TEMP 2...

Страница 40: ...lash memory of the Q24NG The internal boot procedure is started when this pin is low during the reset of the module In normal mode this pin has to be left open In Internal boot mode low level has to b...

Страница 41: ...n be left open If used emergency reset it has to be driven by an open collector or an open drain output BOOT Pin 12 RST Pin 14 Switch RESET Figure 21 RST pin connection Remark Inside the Q24NG there i...

Страница 42: ...it Output voltage I 100 mA 2 74 2 86 V Output Current 100 mA 3 10 VCC_RTC Real Time Clock Supply 3 10 1 General VCC_RTC input is used to provide a back up power supply for the internal Real Time Clock...

Страница 43: ...gulator 2 5 V 10 With very Low Iq VBATT 470 1K Ex 470uF Shottky Diode En Vout Gnd Vin Figure 22 RTC Supplied by a capacitor Estimated range with 470 F Capacitor 30 seconds 3 10 2 2 Super Capacitor Reg...

Страница 44: ...e 24 RTC supplied by a battery cell with regulator Estimated range with 2 mAh rechargeable battery 3 days Warning Before battery cell assembly ensure that cell voltage is lower than 2 75V to avoid any...

Страница 45: ...cy depends on application A dual Band antenna shall work in all these frequency bands 4 2 Antenna implementation The impedance is 50 nominal and the DC impedance is 0 4 2 1 Recommendations Antenna sub...

Страница 46: ...lines and cables shall be as short as possible The coaxial cable shall not be placed close to devices operated at low frequencies Some signals like VBATT and charger line may require some EMI RFI deco...

Страница 47: ...ion 6 3 3 Antenna cable preparation is shown in Figure 27 1 8 1 0 2 5 1 37 0 84 0 305 Solder the core of the coaxial cable Solder the shielding for ground contact and mechanical fixing Figure 27 Anten...

Страница 48: ...ule to be soldered on the Ground plane see Wavecom recommendation for lead free soldering in Section 6 3 Figure 28 gives the overall dimension of the module taking into account the PCB dimension and p...

Страница 49: ...the PCB It is recommended to protect clock signals with a ground belt Refer to the following sections for other constraints 3 1 3 for the Power Supply 3 2 6 for the SIM interface 3 3 2 4 for the audi...

Страница 50: ...ential Page 49 58 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WM_PRJ_Q24NG_PTS_002 001 June 2006 6 5 Pads design Figur...

Страница 51: ...the application to the RF receiver in the receiver band ESD protection on SIM if accessible from outside serial link etc Refer to section 3 2 6 SIM interface Length of the SIM interface lines prefera...

Страница 52: ...tandard Xmodem protocol Therefore the application shall either allow a direct access to the Q24NG serial link through an external connector or implement any mechanism allowing the Q24NG firmware to be...

Страница 53: ...PC connected to the serial bus of the modem The necessary signals to proceed with the downloading are Rx Tx RTS CTS and GND Prior to running the WAVECOM downloader the modem has to be set in download...

Страница 54: ...SET and GND Prior to running the Wavecom downloader the Q24NG has to be set in download mode For this the BOOT signal has to be set to low while powering ON or resetting the modem Typical implementati...

Страница 55: ...rty of WAVECOM Not to be distributed or divulged without prior written agreement WM_PRJ_Q24NG_PTS_002 001 June 2006 CT103 TXD GPIO_SCL GPIO_SDA CT106 CTS CT108 2 DTR CT104 RXD CT105 RTS NC_BOOT NC_CHA...

Страница 56: ...nfidential Page 55 58 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WM_PRJ_Q24NG_PTS_002 001 June 2006 Figure 32 Downloa...

Страница 57: ...following reference 14 5087 060 930 861 The matting connector has the following reference 24 5087 060 X00 861 with X 2 or 9 The stacking height is 3 0 mm For further details see the GPC data sheets in...

Страница 58: ...alified to be mounted on antenna pad RG178 10 5 2 IMP connector RF board to board The supplier for the IMP connector is Radiall http www radiall com with the following reference R107 064 900 or R107 0...

Страница 59: ...portal portal action WebdriveActionEvent oid 01g 00000c 02u 10 6 GSM antenna Provider Reference Address Contact Mat Equipement MA112VX00 Z I La Boitardi re Chemin du Roy 37400 Amboise FRANCE Laurent L...

Страница 60: ...08 00 Fax 33 0 1 46 29 08 08 Wavecom Inc 4810 Eastgate Mall Second Floor San Diego CA 92121 USA Tel 1 858 362 0101 Fax 1 858 558 5485 WAVECOM Asia Pacific Ltd Unit 201 207 2nd Floor Bio Informatics Ce...

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