User's Guide

LE920A4 HW User Guide Hardware Commands
Doc#: 1VV0301261 Turning off the Module
Rev. 4.7.1 Page 48 of 124 2019-11-21
NOTE:
To avoid a back-powering effect, it is recommended not to apply any HIGH
logic level signal to the digital pins of the module when it is powered OFF or
during an ON/OFF transition.
NOTE:
Active low signals are labeled with a name that ends with “_N”
Turning off the Module
Turning off the device can be done in different ways:
 AT#SHDN software command
 Hardware shutdown using ON/OFF pad
 Hardware Unconditional Shutdown using the SHDN_N
When the device is shut down by a software command or a hardware shutdown (Using
the ON_OFF pad), it issues a detach request to the network, informing the network that
the device will not be reachable any more.
NOTE:
To check if the device has powered off, monitor the PWRMON hardware
line. When PWRMON goes low, this indicates that the device has powered
off.
NOTE:
To avoid a back-powering effect, it is recommended to avoid having any
HIGH logic level signal applied to the digital pins of the module when it is
powered OFF or during an ON/OFF transition.
NOTE:
Using RESET_N for resetting the module is not recommended.