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3. TECHNICAL BRIEF
3.10.3 HKADC(House Keeping ADC)
The MSM6281 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 MSM6281 device has six analog input pins which are multiplexed to the input of the
internal HKADC.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure. MSM6281HKADC Block diagram
Table. HKADC channel table
Channel Signal Note
HKADC0 AMUX_OUT RF PAM Temperature Check
HKADC1 VBATT_SENSE Battery voltage level
HKADC2 TTY_ADC_DET Ear jack Detection for TTY
HKADC3 REMOTE_ADC Do not use
HKADC4 PCB_Rev_ADC PCB Version Check
HKADC5 Battery_THERM Battery Temperature Check
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