Rainbow Electronics GE863-PY - Manual (Page 15)

GE863 Hardware User Guide
1vv0300783 Rev.0 - 10/06/08
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 15 of 80
4.2 Turning OFF the GE863
The turning off of the device can be done in three ways:
• by software command (see GE863 Software User Guide)
• by hardware shutdown
• by Hardware Unconditional Shutdown
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.
4.2.1 Hardware shutdown
To turn OFF the GE863 the pad ON# must be tied low for at least 2 seconds and then released.
The same circuitry and timing for the power on shall be used.
The device shuts down after the release of the ON# pad.
TIP: To check if the device has powered off, the hardware line PWRMON should be monitored. When PWRMON goes
low, the device has powered off.
4.2.2 Hardware Unconditional Shutdown (for GE863-GPS only)
To unconditionally Shutdown the GE863-GPS, the pad RESET# must be tied low for at least 200
milliseconds and then released.
The maximum current that can be drained from the ON# pad is 0,15 mA.
A simple circuit to do it is:
RESET#
Unconditional Shutdown
impulse
GND