User's Guide

UC864-E-AUTO / AWS-AUTO Hardware User Guide
1vv0300795 Rev.11 – 2010/11/18
Reproduction forbidden without Telit Communications S.p.A’s. written authorization - All Rights Reserved. Page 19 of 78
5.3.2. Hardware Shutdown
To turn OFF UC864-E-AUTO / AWS-AUTO the pad ON/OFF# must be tied low for at
least 2 seconds and then released. Same circuitry and timing for the power on must
be used.
When the hold time of ON/OFF# is above 2 seconds, UC864-E-AUTO / AWS-AUTO
goes into the finalization state and finally will shut down PWRMON at the end of this
state.
The period of the finalization state can differ according to the situation in which the
UC864-E-AUTO / AWS-AUTO is so it cannot be fixed definitely.
Normally it will be above 10 seconds later from releasing ON/OFF# and DTE should
monitor the status of PWRMON to see the actual power off.
TIP:
TIP: TIP:
TIP:
To check if the device has powered off, hardware line PWRMON must be monitored.
When PWRMON goes low, the device has powered off.