Specifications

WM_PRJ_Q2501_PTS_001 – 003
March 2004
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2.7.3 Dead reckoning interface
WISMO Quik Q2501 module provides a full-digital interface for dead reckoning
function: SPI bus (GPS_SCK, GPS_MOSI and GPS MISO) with 2 different chip
select (GPS_PCS0_N and GPS_PCS1_N), and 2 GPI (GPS_REVERSE and
GPS_EXTINT0).
The SPI bus is used to drive an ADC for temperature monitoring (GPS_PCS0_N)
and for gyroscope (GPS_PCS1_N).
The distance information is given by the odometer and optionally by the reverse
indicator.
Pin description
Signal Pin # I/O I/O type Description
GPS_SCK 5 I 1V8_CMOS SPI clock for dead reckoning
GPS_MOSI 8 I/O 1V8_CMOS/
1X
SPI data (Master Output Slave In)
- Not used for dead reckoning
GPS_MISO 11 I/O 1V8_CMOS/
1X
SPI data (Master Input Slave Out)
for dead reckoning
GPS_PCS0_N 13 O 1V8_CMOS
1X
Temperature sensor for dead
reckoning
GPS_PCS1_N 15 O 1V8_CMOS
1X
Gyroscope connection for dead
reckoning
GPS_REVERSE
7 I 1V8_CMOS Reverse indicator input for dead
reckoning
GPS_EXTINT0 9 I 1V8_CMOS Odometer input for dead reckoning
2.7.4 Output signal
2.7.4.1 1.8 V external power supply
A 1.8 V power supply output is available on the System Connector for external
digital devices.
Pin description
Signal Pin # I/O I/O type Description
GPS_VCORE 19 O Supply 1.8 V supply for external digital
devices
This supply is available when the GPS part is activated.