User's Manual

LE940B6 Hardware User Guide
1VV0301331 Rev. 1.8 - 2017-03-15
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9.2. RTC – Real Time Clock
The VRTC pin is used to power the RTC only when the main battery voltage level is too low or
missing.
9.3. 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 35: 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
9.4. ADC Converter
9.4.1. Description
The LE940B6 module provides three on-board 12-bit Analog to Digital converters. Each ADC reads
the voltage level applied on the relevant pin, converts it and stores it into a 16-bit word.
Table 36: ADC Parameters
Min Max Units
Input voltage range 0 1.2 Volt
AD conversion - 12 bits
9.4.2. Using the ADC Converter
An AT command is available to use the ADC function.
The command is AT#ADC=1,2. The read value is expressed in mV.
Refer to Ref 1: LE940B6 AT Command Reference Guide for the full description of this function.