LG CU405 Service Manual page 43

3. TECHNICAL BRIEF
3.14.3 HKADC(House Keeping ADC)
The MSM6280 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 MSM6280 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 REF_ADC
HKADC3 TTY_ADC_DET
HKADC4 PCB_Rev_ADC
HKADC5 Battery_THERM
LGE Internal Use Only
Figure. MSM6280HKADC Block diagram
Note
RF PAM Temperature Check
Battery voltage level
ADC Reference voltage
Ear jack Detection for TTY
PCB Version Check
Battery Temperature Check
Table. HKADC channel table
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