User's Manual

LE920A4 HW User Guide Hardware Commands
Doc#: 1VV0301261 Turning off the Module
Rev. 4.3 Page 53 of 123 2017-12-07
NOTE:
Do not use any pull-up resistor on the SHDN_N line or any totem pole digital
output. Using a pull-up resistor may cause latch-up problems on the module’s
power regulator and improper functioning of the module. The SHDN_N line
must be connected only in an open-collector configuration.
NOTE:
The Unconditional Hardware Shutdown must always be implemented on the
boards, but the software must use it only as an emergency exit procedure, and
not as a normal power-off operation.