Rainbow Electronics GM862-GPS - Manual (Page 12)

GM862-GPS Software User Guide
1vv0300729 Rev. 5 - 05/07/07
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2.3 Turning ON the GM862-GPS
To turn on the GM862-GPS the pin ON# must be tied low for at least 1 second and then released.
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 900ms 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.
2.4 Turning OFF the GM862-GPS
The turning off of the device can be done in two ways:
•
by software command
•
by hardware shutdown (refer to Hardware User Guide)
When the device is shut down by software command or by hardware shutdown, it issues to the
network a detach request that informs the network that the device will not be reachable any more.
2.4.1.1 Software shutdown
•
Send command AT#SHDN<cr>
•
wait for
OK
response
The device shuts down with the following sequence of activities:
•
Detach from the network
•
Module Shutdown
In the case of Network unavailability the detach will be attempted few seconds (typical 6secs).
After this timeout the module will be shut down.