User's Manual

LE920A4 HW User Guide Hardware Commands
Doc#: 1VV0301261 Turning off the Module
Rev. 4.3 Page 48 of 123 2017-12-07
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, 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.