User's Guide

LE910Cx HW User Guide
Doc#: 1VV0301298
Rev. 13.0 Page 88 of 124 2019-07-15
Indication of Software Ready
The SW_RDY signal provides indication about the ability of the module to receive
commands. As long as the SW_RDY is asserted low, it indicates that the LE910Cx has
not yet finished booting. Once the SW_RDY is asserted high, it indicates that the
LE910Cx is ready to receive commands.
The SW_RDY does not have a dedicated pin. The SW_RDY functionality is available on
GPIO_08 pin (by default GPIO_08 functions as SW_RDY).
RTC – Real Time Clock
The RTC within the LE910Cx module does not have a dedicated RTC supply pin. The
RTC block is supplied by the VBATT supply.
If the battery is removed, RTC is not maintained so if maintaining an internal RTC is
needed, VBATT must be supplied continuously.
In Power OFF mode, the average current consumption is ~25uA.
VAUX Power Output
A regulated power supply output is provided to supply small devices from the module.
This output is active when the module is ON and goes OFF when the module is shut
down. The operating range characteristics of the supply are as follows:
Table 37: Operating Range – VAUX Power Supply
Min
Typical
Max
Output voltage
1.75V
1.80V
1.85V
Output current
100 mA
Output bypass capacitor (within the
module)
1 μF
ADC Converter
9.5.1. Description
The LE910Cx module provides three on-board 8-bit Analog to Digital converters. Each
ADC reads the voltage level applied on the relevant pin, converts it and stores it into an 8-
bit word.