Manual

GE863-GPS Software User Guide

1vv0300724 Rev. 3 - 05/07/07

5 GPS operations

5.1 Introduction

The GE863-GPS module is equipped with a SiRFStar III GPS receiver that is controllable by the GSM

modem using a setof AT commands or dedicated NMEA sentences.

5.2 GE863-GPS Serial Ports

4 serial ports are available on the module:

• MODEM SERIAL PORT

• MODEM SERIAL PORT 2 (GPS CONTROL PORT)

• GPS SERIAL PORT A (SIRF BINARY)

• GPS SERIAL PORT B (NMEA)

5.2.1 GPS SERIAL PORT A (SIRF BINARY)

This port is carrying out the GPS navigation data in SIRF BINARY format.

The default configuration is 57600 bps, 8, n, 1

It is available on the following pins:

PIN # NAME DESCRIPTION TYPE

78 RX_GPS_BIN GPS RX Data (Sirf Binary) CMOS 2.8V

80 TX_GPS_BIN GPS TX Data (Sirf Binary) CMOS 2.8V

The typical application that permits also to control the GPS part by the GSM modem is the following:

PIN # NAME NAME PIN#

25 TX_TRACE RX_GPS_BIN 78

26 RX_TRACE TX_GPS_BIN 80

This configuration is also settable on the EVK board.

This configuration is defined as “Controlled Mode".