User's Guide

LE910Cx HW User Guide
Doc#: 1VV0301298
Rev. 2.0 Page 44 of 120 2018-11-19
NOTE:
During SW initialization of the LE910Cx, the SW configures all pads and
interfaces to their desired mode. When PWRMON goes high, this indicates
that the initialization of all I/O pads is completed.
NOTE:
Do not use any pull-up resistor on the ON_OFF_N line as it is internally
pulled up. Using a pull-up resistor may cause latch-up problems on the
LE910Cx power regulator and improper powering on/off of the module. The
ON_OFF_N line must be connected only in an open-collector configuration.
NOTE:
For systems not requiring controlled power ON/OFF, automatic power on can
be supported by shorting the ON_OFF signal directly GND
In this case, the module will start power on sequence immediately after
VBATT supply is applied
NOTE:
Active low signals are labeled with a name that ends with "#" or with “_N”
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.