LG F1200 Service Manual page 36

(5) ADC Channels
ABB ADC block is composed of 4 internal ADC (Analog to Digital Converter) channels and 4
external ADC channel. This block operates charging process and other related process by
reading battery voltage and other analog values.
ADC 8 channels
Resource
VCHG
VBAT
ICTL
VBACKUP
ADIN1,4
ADIN2
ADIN3
ADIN5
(6) Switch ON/OFF
F1200 Power State : Defined 4 cases as follow
- Power-ON : mobile is powered by main battery or backup battery.
- Power-OFF : mobile isn't any battery.
- Switch-ON : mobile is powered and waken up from switch-off state.
- Switch-OFF : mobile is powered to maintain only the permanent function (ULPD).
To enter into Switch-ON state, one of following 4 condition is satisfied.
- PWR-ON pushed after a debouncing time of 30ms.
- ON_REMOTE : After debouncing, when a falling edges detected on RPWON pin.
- IT_WAKE_UP : When a rising edge is detected on RTC_ALARM pin.
- CHARGER_IC : When a charger voltage is above VBAT+0.4V on VCHG.
Name
VCHG
VBAT
ICTL
VBACKUP
N.U.
BATT_TEMP
TEMPSENSE
HOOK_DETECT
Table 10. ADC Channel Spec.
- 35 -
3. TECHNICAL BRIEF
Description
Charging Management
Backup Battery
-
Battery Detect
Temperature Sensing
Hook Detect