Gpadc (General Purpose Adc) And Autoadc2 - LG CF360 Service Manual

3. TECHNICAL BRIEF

3.4 GPADC (General Purpose ADC) and AUTOADC2

The GPADC consists of a 14 input MUX and an 8-bit ADC. The analog input signal is selected
with the MUX and converted in the ADC.
The GPADC has a built in controller, AUTOADC2, which is able to operate in the background
without software intervention. The AUTOADC2 periodically measures the battery voltage or
current. (Fig.2-4-1) shows the schematic of GPADC part. The GPADC channel spec is as following
(Table 2-4-1).
ADC 2 channels
Resource
GPA2
GPA7
LGE Internal Use Only
Fig 3-4-1. Schematic of GPADC and AUTOADC2
Fig 3-4-2. GPADC and AUTOADC2 Block diagram
Name
ADC_DET
VBACKUP
Table 3-4-1. GPADC channel spec
Description
Micro usb type detect
Backup battery
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