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3. TECHNICAL BRIEF
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.11.3 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.
Figure. MSM6280HKADC Block diagram
Channel
Signal
Note
HKADC0
AMUX_OUT
RF PAM Temperature Check
HKADC1
VBATT_SENSE
Battery voltage level
HKADC2
N.C
N.C
HKADC3
RMT_ADC
Ear jack ADC
HKADC4
PCB_Rev_ADC
PCB Version Check
HKADC5
VBAT_TEMP
Battery Temperature Check
Table. HKADC channel table