TDMA M3090/M3097: GCAP2 (U1500)
B26
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 signals to properly activate the radio.
• Bandgap reference voltage
• Audio amplification for the speaker
• Audio amplification for the alert
• Audio amplification for the EXT speaker
• Audio amplification of the microphone
• Audio CODEC
• Op-amps for use in the battery charger
• Internal D/A for the battery charger
• 8 channel, 8 bit A/D
• Real Time Clock
• 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
• 3 wire bus A/D
• Battery selection control circuitry
BLOCK DIAGRAM NOT NECESSARY
REFER TO PAGE B27
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