- 61 -
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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.3-4-1) shows the schematic of GPADC part. The GPADC channel spec is as following
(Table 3-4-1).
Figure 3-4-1. Schematic of GPADC and AUTOADC2
ADC 6 channels
Resource Name Description
GPA0 RTEMP Radio temperature sense
GPA2 VLOOP Loop voltage sense
GPA3 WPOWERSENSE Reference voltage for PAM
GPA4 WRFLOOP Lock inform
GPA6 GPA6 Headset detect
GPA7 VBACKUP Backup battery
Table 3-4-1. GPADC channel spec
Figure 3-4-2. GPADC and AUTOADC2 Block diagram
To Next Page
Loading...
