Z80C30 Datasheet, PDF (26/96 Pages) Zilog, Inc. – CMOS SCC SERIAL COMMUNICATIONS CONTROLLER

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Internal Data Bus
WR7
WR6
SYNC Register SYNC Register
WRB
20-Bit TX Shift Register
TX Buffer
1 Byte
To Other Channel
Internal TXD
Final TX
MUX
TXD
Zero Insert
(5 Bits)
Sync
Sync
SDLC
Transmit
MUX & 2-Bit
Delay
NRZ
Encode
CRC-Gen
Transmit Clock
From Receiver
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