LE910C1 Hardware User Guide
1VV0301298 Rev. 1.08 - 2017-11-14
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5.3. Turning OFF the LE910C1 Module
Turning OFF the device can be done in four different ways:
• AT#SHDN software command
• Hardware shutdown using ON/OFF# pad
• Hardware Unconditional Shutdown using the HW_SHUTDOWN_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.
5.3.1. Shutdown by Software Command
The LE910C1 module can be shut down by a software command.
When a shutdown command is sent, LE910C1 goes into the Finalization state and at the end of the
finalization process 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 should monitor the status of PWRMON to observe the actual power-
off.
Figure 6: Shutdown by Software Command
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