Wavecom WISMO Quik Q2501 Customer Design Manuallines Download Page 27

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WM_PRJ_Q2501_PTS_002

- 001

March

2004

confidential ©

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27 / 79

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

Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à
des tiers sans son autorisation préalable.

3.3.1.2

Auxiliary GSM Serial Link implementation (GSM_UART2)

C1+
C1-
C2+
C2-
T1IN
T2IN

R1OUT
R2OUT

V+

V-

T1OUT
T2OUT

R1IN
R2IN

GND

C203

470 nF

C0805

S_RTS2

S_TXD2

S_CTS2

S_RXD2

GND

WISMO

Q2501

GND

C202

470 nF

C0805

GSM_RTS2

GSM_TXD2

GSM_CTS2

GSM_RXD2

3232

U200

SSOP16

C204

100 nF

C200

470 nF

C0805

C201

470 nF

C0805

3V3

VCC

GND

J200

SUB-D9F-C

Figure 13: Example of RS232 level shifter implementation for GSM UART2

Summary of Contents for WISMO Quik Q2501

Page 1: ...ted or divulged without prior written agreement Ce document est la propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des tiers sans son autorisation pr alable WISMO Quik Q25 series WIS...

Page 2: ...perty of WAVECOM Not to be distributed or divulged without prior written agreement Ce document est la propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des tiers sans son autorisation...

Page 3: ...configuration is GSM GPRS part 32 Mbits of Flash memory and 4 Mbits of SRAM GPS part 8 Mbits of Flash memory This document gives recommendations and general guidelines to design an application using...

Page 4: ...er supply part 17 3 1 1 Main power supply and ground plane 17 3 1 2 RTC Back up supply 20 3 2 Common GSM GPS part 22 3 2 1 Module activation function ON OFF 22 3 2 2 Alternative download control funct...

Page 5: ...tion 54 3 5 3 GPS antenna connection 55 3 5 4 Single coax connection 59 4 PCB Design 60 4 1 General Rules and Constraints 60 4 2 Specific Routing Constraints 60 4 2 1 System Connector 60 4 2 2 Power S...

Page 6: ...Figure 9 Example N 1 of GSM and GPS activity status implementation 24 Figure 10 Example N 2 of GSM activity status implementation 24 Figure 11 Example of RS232 level shifter implementation for GSM UAR...

Page 7: ...gure 30 Example of RS232 level shifter implementation for GPS UART2 48 Figure 31 Example of RS232 level shifter implementation for GPS UART0 49 Figure 32 SPI interface implementation for the dead reck...

Page 8: ...sponsibility is assumed for its use Please read carefully the safety precautions for an application based on a WISMO Quik Q2501 module In addition Wavecom reserves the right to modify this information...

Page 9: ...with poor no satellites view by the aid of external sensors that provide course odometer and heading gyroscope Single Coax WAVECOM concept that allows the user to use only one single coaxial cable fo...

Page 10: ...e receiver knows due to a backup battery or by other techniques his last position approximate time and almanac Thanks to this it can quickly acquire satellites and get a position fix faster than in co...

Page 11: ...a Carrier Detect DCE Data Communication Equipment DCS Digital Cellular System DR Dynamic Range DSR Data Set Ready DTE Data Terminal Equipment DTR Data Terminal Ready EFR Enhanced Full Rate E GSM Exten...

Page 12: ...ics Association NOM NOMinal PA Power Amplifier Pa Pascal for speaker sound pressure measurements PBCCH Packet Broadcast Control CHannel PC Personal Computer PCB Printed Circuit Board PDA Personal Digi...

Page 13: ...ri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des tiers sans son autorisation pr alable Abbreviation Definition TBC To Be Confirmed TDMA Time Division Multiple Access TP Test Point TVS...

Page 14: ...e shielding Module control Full set of AT commands for GSM GPRS including GSM 07 07 and 07 05 AT command sets Specific AT commands for GPS management on same link as GSM GPRS AT commands Direct recept...

Page 15: ...vailable with external adaptation SIM Tool Kit Release 99 GPS GPS L1 civil frequency 1575 42 MHz 16 channels GPS receiver Accuracy 2 5 m CEP GPS 2 m CEP depending on accuracy of correction data SBAS W...

Page 16: ...propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des tiers sans son autorisation pr alable 2 2 Functional architecture RF GSM FRONT END W I S M O Q 2 5 0 1 S Y S T E M C N N E C T O R...

Page 17: ...any damage when starting the module 3 1 Power supply part 3 1 1 Main power supply and ground plane 3 1 1 1 Electrical constraints The main power supply VBATT is the only external power supply source u...

Page 18: ...Because VBATT supplies directly the GSM RF power amplifier component it is essential to keep a minimum voltage ripple at this connection in order to avoid any phase error or spectrum modulation degrad...

Page 19: ...rent peaks in a short time bursted radio emission The VBATT line must support peak currents with an acceptable voltage drop which guarantees a VBATT minimal value of 3 4 V lower limit of VBATT For PCB...

Page 20: ...rnal Real Time Clock RTC The RTC is supported by the WISMO Quik Q2501 module when powered on but a back up power supply is needed to save date and time information when the module is switched off If t...

Page 21: ...1 2 2 2 Non Rechargeable battery WISMO Q2501 GND Ex Varta CR2016 10 VCC_RTC 3 1 BAS16 Figure 4 RTC supplied by a non rechargeable battery Estimated range with 85 mAh battery 800 h min 3 1 2 2 3 Rechar...

Page 22: ...left at high level until switch OFF VBATT 1 2 3 SW500 ON OFF Figure 6 Example of ON OFF pin connection 3 2 2 Alternative download control function BOOT If the standard X modem download procedure does...

Page 23: ...s signal has to be considered as an emergency reset only a reset procedure is automatically driven by an internal hardware during the power up sequence This signal can also be used to provide a reset...

Page 24: ...H_LED pin 72 and GPS_TIMEPULSE pin 17 can be used to drive two LEDs through an open collector digital transistor according to the module activity status GPS_TIMEPULSE GND VBATT U700 D702 1 2 R702 5 4...

Page 25: ...erfaces UART1 main serial link which consists in a flexible 8 wire serial interface complying with V24 standard TX RX CTS RTS DSR DTR DCD and RI UART2 auxiliary serial link which consists in a flexibl...

Page 26: ...sation pr alable Warning The application board must allow the WISMO serial link signals the BOOT the RESET and the ON OFF module signals to be easily accessed thus allowing the module firmware to be u...

Page 27: ...ation pr alable 3 3 1 2 Auxiliary GSM Serial Link implementation GSM_UART2 C1 C1 C2 C2 T1IN T2IN R1OUT R2OUT V V T1OUT T2OUT R1IN R2IN GND 9 2 3 4 11 1 C203 470 nF C0805 15 8 S_RTS2 14 13 S_TXD2 S_CTS...

Page 28: ...e I O up to 4 GSM General Purpose Output up to 1 GSM General Purpose Input Pin description Signal Pin I O I O type Description GPIO0 44 I O CMOS3X Multiplexed with GSM_CTS2 GPIO1 22 I O CMOS 2X GPIO2...

Page 29: ...face or standard 2 wire peripherals The choice between these two types of peripherals is exclusive due to signal multiplexing 3 3 3 1 SPI Bus The SPI bus includes clock SPI_CLK I O SPI_IO and enable s...

Page 30: ...son autorisation pr alable 3 3 3 2 Two wire bus The 2 wire interface includes clock and data signals complying with a standard 96 kHz interface Each signal has to be pulled up to VCC via an external...

Page 31: ...ltage Suppressor diodes TVS on the signal connected to the 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 an...

Page 32: ...est la propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des tiers sans son autorisation pr alable SIM socket connection Pin description Signal Pin number Description VCC 1 SIM_VCC RST...

Page 33: ...ly set the external SIM driver level 1 8 V or 3 V As for 3 V SIM it is recommended to add Transient Voltage Suppressors on the signals connected to the SIM socket refer to Figure 16 Typical implementa...

Page 34: ...rly set the external SIM driver level 3 V or 5 V As for 3 V SIM it is recommended to add Transient Voltage Suppressors on the signals connected to the SIM socket refer to Figure 16 Typical implementat...

Page 35: ...oard scanner is equipped with internal pull down resistors for the rows and pull up resistors for the columns Current only flows from the column pins to the row pins This allows a transistor to be use...

Page 36: ...e sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement Ce document est la propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des tier...

Page 37: ...rophone inputs MIC2 and auxiliary microphone inputs MIC1 is the availability of an internal biasing for an electret microphone For both microphone paths the connection can be either differential or si...

Page 38: ...ne MIC2 implementation 3 3 6 2 4 Auxiliary Microphone Inputs MIC1 MIC1 inputs do not include internal bias making these inputs the standard ones for an external headset or a hands free kit connected e...

Page 39: ...s tiers sans son autorisation pr alable 3 3 6 2 5 Differential connection example Impedance of the microphone input in differential mode Module ON Rin 10 k 30 Module OFF Rin 10 M 30 Figure 21 MIC1 inp...

Page 40: ...That is the reason why VCC_AUDIO must be an other 2 8 V to 3 V power supply instead of VCC which is available on system connector pin 60 R1 is used as a voltage supply filter with C4 R1 R2 C4 and C5 h...

Page 41: ...r 2 positive output SPK2N 67 O Analog Speaker 2 negative output Pin description Signal Pin I O I O type Description SPK1P 61 O Analog Speaker 1 positive output SPK1N 63 O Analog Speaker 1 negative out...

Page 42: ...7 F depending on speaker characteristics and output power C1 C2 R1 Zhp Using a single ended connection includes losing of the output power 6 dB compared to a differential connection Nevertheless in a...

Page 43: ...ype Description BUZ 69 O Open collector Buzzer output The maximum peak current is 80 mA and the maximum average current is 40 mA A diode against transient peak voltage must be added as described below...

Page 44: ...xternal digital devices VCC digital power supply is mainly used to pull up signals such as I O supply the digital transistors driving LEDs supply the SIM_PRES signal act as a voltage reference for ADC...

Page 45: ...in power supply VBATT to be externally switched OFF Pin description Signal Pin I O I O type Description GSM_BBEN 6 O CMOS VCC_RTC 1X Indicator of GSM Base Band activation 3 3 11 External Interrupt The...

Page 46: ...is a 10 bit resolution ADC ranging from 0 V to 2 8 V AUXADC input can be used for example to monitor external temperature useful for safety power off in case of application over heating Pin descriptio...

Page 47: ...1 GPS activation function The GPS function can be activated either by software or by hardware command Hardware control of the GPS activation function is defined by the software Pin description Signal...

Page 48: ...ault configuration this interface allows GPS NMEA frame communications Pin Description Signal Pin I O I O type Description GPS_RXD2 1 O Open Collector with 10 k internal pull up CT104 Receive Serial D...

Page 49: ...entation GPS_UART0 This 2 wire serial interface is a 1 8 V interface Default protocol on this serial link is RTCM However NMEA protocol can be available on this serial link by software configuration v...

Page 50: ...ignals as described in the table below Pin Description Signal Pin I O I O type Description GPS_SCK 5 I CMOS 1 8V SPI Clock GPS_MOSI 8 I O CMOS 1 8V 1X Serial Data Master Out Slave In GPS_MISO 11 I O C...

Page 51: ...t voltage used to supply the gyroscope provide the reference voltage to the A D converter VREF input Even smallest voltage drops on the 5 V supply due to load changes in the WISMO Q2501 module can hav...

Page 52: ...lgu des tiers sans son autorisation pr alable 3 4 3 2 Reverse Indicator Input Information not available for preliminary version 3 4 3 3 Odometer Input Information not available for preliminary version...

Page 53: ...ection Block diagram Description Normal connection Two dedicated antennas are used Single Coax connection One specific antenna is used connected to the GSM GPRS connector The Single Coax feature allow...

Page 54: ...e table hereafter A dual Band antenna will work in these frequency bands and must have the following characteristics Characteristics E GSM 900 DCS 1800 Frequency TX 880 to 915 MHz 1710 to 1785 MHz Fre...

Page 55: ...antenna could affect the application TDMA noise for instance As a general recommendation all components or chips operated at high frequencies microprocessors memories DC DC converter or other active...

Page 56: ...5 Typ 25 Max 45 dB Typical radiated gain 5 at zenith dBi Filtering 40 min 130 MHz of L1 rejection of GSM DCS Tx band dB Supply voltage 3 or 5 V With GPS antenna external supply Min Typ 30 Max 50 mA Wi...

Page 57: ...en using DCS1800 band that is only at 135 MHz from GPS signals Figure 34 GPS reception jammed by GSM GPRS transmission Even if the Q2501 module has been designed to minimize the influence of GSM GPRS...

Page 58: ...tween the Q2501 module and the passive antenna could easily add 1 dB taking into account losses in the cable and the connectors mismatch losses Consequently the total NF would be degraded to 4 dB Rang...

Page 59: ...evices Similar LNA with lower consumption from other manufacturers can be used NEC Maxim RFMD Some basic RF rules must be observed for the PCB layout the distance between the ceramic patch antenna and...

Page 60: ...ion design makes it possible all analog signals should be separated from digital signals by a Ground line on the PCB 4 2 Specific Routing Constraints 4 2 1 System Connector Refer to the datasheet of t...

Page 61: ...ule The ground track or the ground plane on the application board must support current peaks as for the VBATT track If the ground track between the module and the power supply is a ground plane it mus...

Page 62: ...lane is a complete layer of the application PCB To ensure a good shielding of the module a complete ground plane layer on the application board must be available with no trade off Connections between...

Page 63: ...he application board the following recommendations must be observed for the PCB layout The RF signals must be routed using traces with 50 characteristic impedance Basically the characteristic impedanc...

Page 64: ...route the digital line s outside the RF structure as shown in the figure below Bad routing Correct Routing The yellow traces cross the RF trace There is no signal around the RF path Stripline and Cop...

Page 65: ...Connection Dedicated cable assembly Cable used Description One side of the coaxial cable is fitted with a male MMS connector the other one is soldered directly on the application board A specific cabl...

Page 66: ...nductor Use 50 traces StripLine or MicroStrip Figure 39 Example of PCB routing for pigtail connection Note if a 2 5 mm diameter cable is used as pigtail it is recommended to use cable made with PTFE i...

Page 67: ...s the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement Ce document est la propri t exclusive de WAVECOM Il ne peut tre communiqu ou divulgu des...

Page 68: ...l Specifications The next page shows the mechanical drawing which specifies the area needed for module fitting in an application That drawing gives among other things the drill template for the four p...

Page 69: ......

Page 70: ...should be paid to Possible spurious emission radiated by the application to the RF receiver in the receiver band ESD protection on SIM if accessible from outside serial link etc Refer to paragraph 3 3...

Page 71: ...a PC There are two ways for downloading a software into the WISMO Q2501 module normal download mode use of XMODEM protocol alternative download mode use of a specific downloading software tool in ass...

Page 72: ...C2 T1IN T2IN R1OUT R2OUT V V T1OUT T2OUT VCC 20 2 25 1 24 1 C404 2 2 F 4 VCC_STK 5 5 CT125 S_RI 6 CT109 S_DCD 6 1 15 11 9 2 11 9 8 GND 28 21 3 23 2 1 WISMO Q2501 GND C403 2 2 F GSM_DTR1 GSM_TXD1 GSM_...

Page 73: ...debug connector In such a case input signals coming from this connector mask the input signals coming from the MAX3237 device VCC and GND are available on the debug connector to allow the powering of...

Page 74: ...ed some parameters can be degraded because some basic precautions have not been taken poor power supply for example Most of the time this will not affect the functionality of the product but the produ...

Page 75: ...mm pitch from MOLEX For further details about this connector refer to document 2 The matting connector from MOLEX has the following part number 52991 0801 For further details about this connector refe...

Page 76: ...ips com 9 5 RF cable A wide variety of cables fitted with MMS connectors is proposed by RADIALL refer to the MMS datasheet in document 2 MMS pigtails MMS cable assemblies Between series cable assembli...

Page 77: ...x com Tel 44 0 1622 618628 Fax 44 0 1622 618629 MicroPuissance ANN ST 0 005 0 3V 5V Immeuble FEMTO 1 avenue de Norv ge ZA de Courtaboeuf BP 79 91943 LES ULIS CEDEX jm gourin micropuissance fr Tel 33 1...

Page 78: ...is document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement Ce document est la propri t exclusive de WAVECOM Il ne peut tre communiqu ou...

Page 79: ...Insulation Resistance 100 M min Physical Housing White glass filled LCP plastic UL 94V 0 Contact Phosphor Bronze Plating Gold over Nickel Operating Temperature 40 to 105 C CATALOG DRAWING FOR REFERENC...

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