HE920 Hardware User Guide
1vv0301014 Rev.9 – 2014-01-23
Reproduction forbidden without written authorization from Telit Communications S.p.A. - All Rights
Reserved.
Page 31 of 84
For example:
1-
Let us assume you need to drive the RESET* pad with a totem pole output of a +1.8/5 V
microcontroller (uP_OUT2):
4.5.
Hardware Unconditional Shutdown (Power Off)
The Unconditional Shutdown of the module could be activated using the SHDN* line (pad
AN12).
WARNIG:
The hardware unconditional Shutdown 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 unconditionally shutdown the HE920, the pad SHDN* must be tied low for at least 200
milliseconds and then released.
10k
+1.8 / 5V
