User's Guide

LE910Cx HW User Guide
Doc#: 1VV0301298
Rev. 13.0 Page 48 of 124 2019-07-15
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 8 shows a simple circuit for applying an unconditional shutdown.
Figure 8: Circuit for Unconditional Hardware Shutdown
Figure 9 shows the system power-down timing when using HW_SHUTDOWN_N.
Figure 9: Power down timing using HW_SHUTDOWN_N
NOTE:
Recommended values are as follows: R2 = 47kΩ, R1 = 10kΩ.
200mS Sec < T_Hold
VBATT
SHDN_N
SW_RDY
T_RDY ~0 Sec
V_AUX
PWRMON
T_PWRMON ~0 Sec
OFF StateActive State