Specifications

WM_PRJ_Q2501_PTS_001 – 003
March 2004
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Ce document est la propriété exclusive de WAVECOM. Il ne peut être communiqué ou divulgué à des tiers sans son
autorisation préalable.
2.7.2 GPS serials links
WISMO Quik Q2501 provides 2 serial links connected to the GPS baseband unit:
•
GPS Main serial link: GPS_UART2
•
GPS Auxiliary serial link: GPS_UART0
GPS Main
Serial Link
(UART2)
GPS_TXD2
GPS_RXD2
DTE
GPS Auxiliary
Serial Link
(UART0)
GPS_TXD0
GPS_RXD0
DTE
Figure 18: GPS interface - Serial LinksGPS Main Serial Link
This 2-wire serial interface is a 3 V interface complying with V24 technical
specifications.
In default configuration, this interface makes GPS NMEA frames available
(see § 1.7 for further details).
Pin description
Signal Pin # I/O I/O type Description
GPS_RXD2 1 O
Open
Collector
with internal
10 k
Ω
Pull-up
resistor
CT104 - Receive serial data
GPS_TXD2 2 I 2V8 CMOS CT103 - Transmit serial data
WISMO Q2501
(DCE)
External
Application
(DTE)
GPS_TXD2
GPS_RXD2
Figure 19: Main GPS serial link