Wavecom WISMO Quik Q2501, Руководство по дизайну для клиентов

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WM_PRJ_Q2501_PTS_002 - 001
March 2004
confidential ©
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3.4.3 Dead reckoning interface
3.4.3.1 SPI interface for gyroscope and temperature sensors
The WISMO Q2501 module is configured as a SPI master.
The SPI interface consists in five signals 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 CMOS
1.8V/1X
Serial Data (Master In/Slave Out)
GPS_PCS0_N 13 O CMOS
1.8V/1X
Selects temperature sensor
GPS_PCS1_N 15 O CMOS
1.8V/1X
Select A/D converter for
Gyroscope signal
The figure hereafter gives the block diagram of the GPS SPI interface connected
to:
A/D converter for gyroscope sensor,
Temperature sensor.
GPS_VCORE (pin 19)
GPS_PCS1_N (pin 15)
GPS_PCS0_N (pin 13)
GPS_SCK (pin 5)
GPS_MISO (pin 11)
GPS_MOSI (pin 8)
WISMO
Q2501
100K
Figure 32: SPI interface implementation for the dead reckoning function