Rainbow Electronics GE863-PY User Manual

Page 17

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GE863 Hardware User Guide

1vv0300783 Rev.0 - 10/06/08

page 17 of 80

4.2.3 Hardware Unconditional Reboot (GE863-QUAD/PY/SIM

only)

To unconditionally Reboot the GE863-QUAD/PY/SIM, 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:

NOTE: don't use any pull up resistor on the RESET* line nor any totem pole digital output. Using pull up
resistor may bring to latch up problems on the GE863-QUAD/PY/SIM power regulator and improper
functioning of the module. The line RESET* must be connected only in open collector configuration.

TIP: The unconditional hardware reboot should be always implemented on the boards and software
should use it as an emergency exit procedure.

RESET#

Unconditional Reboot
impulse

GND