Rainbow-electronics GE863-GPS low power Uživatelský manuál stáhnout pdf (Strana 12)

GE863-GPS Software User Guide

1vv0300724 Rev. 3 - 05/07/07

2.3 Turning ON the GE863-GPS

To turn on the GE863-GPS the pin ON# must be tied low for at least 1 second and then released.

A simple circuit to do it is:

NOTE: don't use any pull up resistor on the ON# line. Using pull up resistor may bring to latch

up problems on the GE863-GPS power regulator and improper power off of the module. The

line ON# must be connected only in open collector configuration.

TIP: To check if power has raised it is possible to monitor the PWRMON line, when this line

goes high the module is powered on, but before it remains on the device needs other 900 ms

for software startup. Hence check the PWRMON line and 900 ms after its transition to high it is

possible to release the ON# pin.

When turning on the module, both devices (GSM and GPS) will be started.

The GPS antenna will be supplied and the receiver will start the scanning activity to achieve the Fix.

ON#

Power ON impulse

GND

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Rainbow-electronics GE863-GPS low power Uživatelský manuál Strana 12