User's Manual

GE/GC864-QUAD V2 and GE864-GPS Hardware User Guide
1vv0300915 Rev.2 – 2011-06-15
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Reserved. Page 32 of 97
5.3. Hardware Unconditional Restart
WARNING:
The hardware unconditional Restart must not be used during
normal operation of the device since it does not detach the
device from the network. It shall be kept as an emergency exit
procedure to be done in the rare case that the device gets
stacked waiting for some network or SIM responses.
To unconditionally restart the module, the pad RESET# must be
tied low for at least 200 milliseconds and then released.
The maximum current that can be drained from the RESET# pad is
0.15 mA.
A simple circuit to do it is:
NOTE:
Do not use any pull up resistor on the RESET# line or any
totem pole digital output. Using pull up resistor may bring to
latch up problems on the module power regulator and improper
functioning of the module. The line RESET# must be connected
only in open collector configuration.