Z80C30 Datasheet, PDF (51/96 Pages) Zilog, Inc. – CMOS SCC SERIAL COMMUNICATIONS CONTROLLER

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Write Register 4
D7 D6 D5 D4 D3 D2 D1 D0
Write Register 5
D7 D6 D5 D4 D3 D2 D1 D0
Parity Enable
Parity EVEN/ODD
0 0 Sync Modes Enable
0 1 1 Stop Bit/Character
1 0 1 1/2 Stop Bits/Character
1 1 2 Stop Bits/Character
0 0 8-Bit Sync Character
0 1 16-Bit Sync Character
1 0 SDLC Mode (01111110 Flag)
1 1 External Sync Mode
0 0 X1 Clock Mode
0 1 X16 Clock Mode
1 0 X32 Clock Mode
1 1 X64 Clock Mode
Tx CRC Enable
RTS
SDLC/CRC-16
Tx Enable
Send Break
0 0 Tx 5 Bits (or Less)/Character
0 1 Tx 7 Bits/Character
1 0 Tx 6 Bits/Character
1 1 Tx 8 Bits/Character
DTR
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