Only For Training And Service Purposes - LG TU550 Service Manual

3.11.3 HKADC(House Keeping ADC)
The MSM6275 device has an on-chip 8-bit analog-to-digital converter (HKADC) which is tended to
digitize DC signals corresponding to analog parameters such as battery voltage, temperature, and RF
power levels. The MSM6275 device has six analog input pins which are multiplexed to the input of the
internal HKADC.
ADC Ch# Signal Name
HKADC0 AMUX_OUT
HKADC1 VBATT_SENSE
HKADC2 HDET1
HKADC3 TTY_ADC_DET
HKADC4 PCB_Rev_ADC
HKADC5 CHARGER_THERM
Copyright © 2007 LG Electronics. Inc. All right reserved.

Only for training and service purposes

Figure. MSM6275 HKADC Block diagram
Note
RF PAM Temperature Check
Battery voltage level
RF PAM Power Level Detector
Ear jack Detection for TTY
PCB Version Check
Battery Temperature Check
Table. HKADC channel table
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3. TECHNICAL BRIEF
LGE Internal Use Only