Z80C30 Datasheet, PDF (14/96 Pages) Zilog, Inc. – CMOS SCC SERIAL COMMUNICATIONS CONTROLLER

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Channel A
Exploded View
Transmit Logic
Transmit
Buffer
Transmit MUX
Data Encoding & CRC
Generation
Receive and Transmit Clock Multiplexer
Digital _{Baud Rate}
Phase-Locked _Generator
Loop
Crystal
Oscillator
Amplifier
Modem/Control Logic
Receive Logic
Rec. Status Rec. Status
FIFO 3 Byte FIFO 3 Byte
Receive MUX
SDLC Frame Status FIFO
10 X 19
CRC Checker
Data Decode &
Sync Character
Detection
TxDA
TRxCA
RTxCA
CTSA
DCDA
SYNCA
RTSA
DTRA/REQA
RxDA
Interrupt
Control
Logic
Channel A
Register
Databus
Control
CPU & DMA
Bus Interface
Interrupt
Control
INT
INTACK
IEI
IEO
Interrupt
Control
Logic
Channel B
Register
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Channel A
Channel B
36
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