LG HB620 Service Manual page 63

3. TECHNICAL BRIEF
3.10.3 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.
Channel Signal
HKADC0 AMUX_OUT
HKADC1 VBATT_SENSE
HKADC2 EAR_MIC_P
HKADC3 RNT_ADC
HKADC4 PCB_Rev_ADC
HKADC5 Battery_THERM
LGE Internal Use Only
[Fig. 3.21] MSM6280HKADC Block diagram
Note
RF PAM Temperature Check
Battery voltage level
Ear jack Detection
Headset remote key detection
PCB Version Check
Battery Temperature Check
[Table 3.10] HKADC channel table
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