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TDMA T2290/T2297:
Description
The GCAP2(U1500) provides the regulators and start-up functions for the entire radio. The GCAP2 contains the following hardware
blocks:
•
On/Off control signal s to properly activate the radio.
•
Bandgap reference voltage
•
Audio amplifica tion for the speaker
•
Audio amplifi cation for the alert
•
Audio amplifica tion for the EXT speaker
•
Audio amplific ation of the microphone
•
Audio CODEC
•
8 channel, 8 bit A/D
•
Linear regulators
- RX_2.75V for RX circuits
- 2.75V for logic circuits
- TX_2.75V for TX circuits
- 5V for negative regulator
- REF_2.75V for negative regulator reference
GCAP2 (U1500)
BLOCK DIAGRAM NOT NECESSARY
REFER TO PAGE B25
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