LE910Cx mPCIe Hardware Design Guide
1VV0301510 Rev. 13 Page 35 of 73 2021-07-07
Power OFF Procedure
To turn OFF the LE910Cx-mPCIe module, the W_DISABLE_N pin must be asserted low,
otherwise the module will be power up immediately. For a proper shutdown operation,
use the AT#SHDN command. When a shutdown command is sent, the LE910Cx enters
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 a
complete shutdown is achieved. The DTE should monitor the status of PWRMON to
observe the actual power-off.
Figure 8: PWRMON Process
: Please carefully follow the recommended procedure for
Power Off.
Removing the power supply can only be performed when the unit has
reached the power off state.
Failure to follow the recommended shut-
down and power off
procedures might damage the device and consequently void the
warranty.
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