Service manual

WhiteCap Block Diagram
GCAP-II integrated nearly all the analog functions into one chip, those funcitons
includes power supplies, voltage regulators, A/D and D/A converters for battery
charger, audio CODEC, real time clock, and amplifiers for speaker and microphone
etc. This chip is intended to support the needs of portable cellular telephone products.
It provides control, audio, and regulator functions of the Taichi radio. The following
functions are performed:
- Turn On control signals to properly activate the radio
- Turn off control signals to turn off the radio if an error is detected
- Audio amplification for the speaker
- Audio amplification for the alert
- Audio amplification for EXT audio
- Audio amplification fo the microphone
- 13 bits linear audio CODEC
- Band gap reference voltage
- Linear regulators for DC voltages
- Two BUCK/BOOST switching regulators
- Op-amps for use in the battery charger
- Internal D/A for the battery charger