LG KB770 Service Manual page 61

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
HKADC0
HKADC1
HKADC2
HKADC3
HKADC4
HKADC5
LGE Internal Use Only
Figure 3.10.3 MSM6280HKADC Block diagram
Signal
AMUX_OUT
VBATT_SENSE
MIC2P
RMT_ADC
PCB_Rev_ADC
VBATT_TEMP
Table 3.10.3 HKADC channel table
Note
RF PAM Temperature Check
Battery voltage level
TV_OUT cable detection
Headset remote key detection
PCB Version Check
Battery Temperature Check
- 62 - Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes