LE910Cx Hardware Design Guide
1VV0301298 Rev.40 Page 48 of 149 2023-03-16
Not Subject to NDA
Usually, it will take more than 15 seconds from sending a shutdown command until a
complete shutdown is achieved. The DTE host should monitor the status of
PWRMON/SW_RDY to observe the actual power-off.
Figure 9: Hardware Shutdown
Note: To check whether the device has powered off, monitor the
PWRMON/SW_RDY hardware line. When PWRMON/SW_RDY or goes
low, the device has powered off.
5.3.3. Unconditional Hardware Shutdown
To unconditionally shut down the LE910Cx module, the HW_SHUTDOWN_N pad must be
tied low for at least 200 milliseconds and then released.
Figure 10 shows a simple circuit for applying an unconditional shutdown.
Figure 10: Circuit for Unconditional Hardware Shutdown
Figure 11 shows the system power-down timing when using HW_SHUTDOWN_N.
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