GE864-QUAD V2 Hardware User Guide
1vv0300841 Rev.5
–
2017-05-11
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights
Reserved.
Page 41 of 77
8.1.
Reset Signal
Signal Function
I/O
Ball Number
RESET
Reset
I
A2
RESET is used to reset the GE864-QUAD V2 modules. Whenever
this signal is pulled low, the GE864-QUAD V2 is reset. When
the device is reset it stops any operation. After the release
of the reset GE864-QUAD V2 is unconditionally shut down,
without doing any detach operation from the network where it
is registered. This behavior is not a proper shut down because
any GSM device is requested to issue a detach request on turn
off. For this reason the Reset signal must not be used to
normally shutting down the device, but only as an emergency
exit in the rare case the device remains stuck waiting for
some network response.
The RESET is internally controlled on start-up to achieve
always a proper power-on reset sequence, so there is no need
to control this pin on start-up. It may only be used to reset
a device already on that is not responding to any command.
NOTE:
Do not use this signal to power off the GE864-QUAD V2 . Use
the ON/OFF signal to perform this function or the AT#SHDN
command.
Reset Signal Operating Levels:
Signal
Min
Max
RESET Input
high
2.0V*
2.2V
RESET Input low 0V
0.2V
* this signal is internally pulled up so the pin can be left
floating if not used.
If unused, this signal may be left unconnected. If used, then
it
must always be connected with an open collector transistor
,
