User's Guide

LE910Cx HW User Guide
Doc#: 1VV0301298
Rev. 13.0 Page 47 of 124 2019-07-15
5.3.2. Hardware Shutdown
To turn off the LE910Cx module, the ON_OFF_N pad must be asserted low for at least
2.5 seconds and then released. Use the same circuitry and timing for power-on.
When the hold time of ON/OFF# is above 2.5 seconds, LE910Cx goes into the
Finalization state and eventually shuts down PWRMON.
The duration of the Finalization state can differ according to the current situation of the
module, so a value cannot be defined.
Usually, it will take more than 15 seconds from sending a shutdown command until
reaching a complete shutdown. The DTE host should monitor the status of PWRMON to
observe the actual power-off.
Figure 7: Hardware Shutdown
NOTE:
To check whether the device has powered off, monitor the PWRMON
hardware line. When PWRMON goes low, the device has powered off.