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3. H/W Circuit Description
VRDBB
VRIO
VRMEM
VRRAM
VRABB
VRSIM
VRRTC
3.3.7. 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
ICHG
VBACKUP
ADIN1
ADIN2
ADIN3
ADIN4
Table 3-6. LDO Output Table
Output Voltage
1.5V
2.8V
2.8V
2.8V
2.8V
2.8V
1.5V
Table 3-7. ADC Channel Spec.
Name
VCHG
VBAT
ICHG
VBACKUP
JACK_DETECT
BATT_TEMP
TEMPSENSE
HOOK_DETECT
- 32 -
Usage
Digital Core of DBB
Peripheral devices
External memory
LCD & peripheral devices
Analog Block of ABB
SIM card driver
RTC & 32kHz-crystal
Description
Charging Management
Backup Battery
Jack plug-in detect
Battery Detect
Temperature Sensing
HOOK_DETECT
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Troubleshooting
