LE910Cx HW User Guide
1VV0301298 Rev. 33
Page 44 of 128
2021-06-29
Not Subject to NDA
Turning off the LE910Cx Module
Turning off the device can be done in the following different ways:
•
Shutdown by software using the AT#SHDN software command
•
Hardware shutdown using ON_OFF_N pad
•
Hardware Unconditional Shutdown using the SHDN_N pad
When the device is shut down by a software command or hardware shutdown, it issues
a detach request to the network, informing the network that the device will no longer be
reachable.
5.3.1.
Shutdown by Software Command
The LE910Cx module can be shut down by a software command.
When a shutdown command is sent, LE910Cx enters the Finalization state and at the end
of the finalization process shuts down PWRMON/SW_RDY .
The duration of the Finalization state may vary according to the current situation of the
module, so it is not possible to define a value.
Usually, it will take more than 10 seconds from sending a shutdown command until a
complete shutdown is achieved. The DTE host should monitor the PWRMON/SW_RDY
status to observe the actual power-off.
Note:
To check if the device has powered off, monitor the
PWRMON/SW_RDY hardware line. When PWRMON/SW_RDY goes
low, it means the device has powered off.
Note:
To avoid a back-powering effect, it is recommended to
prevent any HIGH logic level signal from being applied to the
module’s digital pins when it is powered OFF or during an ON/OFF
transition.