Z85233 Datasheet, PDF (118/317 Pages) Zilog, Inc. – The Zilog SCC Serial Communication Controller

Write Register 6
D7 D6 D5 D4 D3 D2 D1 D0
SCC™/ESCC™ User’s Manual
Register Descriptions
5
Sync7
Sync1
Sync7
Sync3
ADR7
ADR7
Sync6
Sync0
Sync6
Sync2
ADR6
ADR6
Sync5
Sync5
Sync5
Sync1
ADR5
ADR5
Sync4
Sync4
Sync4
Sync0
ADR4
ADR4
Sync3
Sync3
Sync3
1
ADR3
x
Sync2
Sync2
Sync2
1
ADR2
x
Sync1
Sync1
Sync1
1
ADR1
x
Sync0
Sync0
Sync0
1
ADR0
x
Monosync, 8 Bits
Monosync, 6 Bits
Bisync, 16 Bits
Bisync, 12 Bits
SDLC
SDLC (Address Range)
Figure 5-8. Write Register 6
5.2.8 Write Register 7 (Sync Character or
SDLC Flag)
WR7 is programmed to contain the receive sync character
in the Monosync mode, a second byte (the last eight bits)
of a 16-bit sync character in the Bisync mode, or a Flag
character (01111110) in the SDLC modes. WR7 holds the
receive sync character or a flag if one of the special
versions of the External Sync mode is selected. WR7 is not
used in Asynchronous mode. Bit positions for WR7 are
shown in Figure 5-9.
Write Register 7
D7 D6 D5 D4 D3 D2 D1 D0
Sync7 Sync6 Sync5 Sync4
Sync5 Sync4 Sync3 Sync2
Sync15 Sync14 Sync13 Sync12
Sync11 Sync10 Sync9 Sync8
0
1
1
1
Sync3 Sync2 Sync1
Sync1 Sync0 x
Sync11 Sync10 Sync9
Sync7 Sync6 Sync5
1
1
1
Sync0
x
Sync8
Sync4
0
Monosync, 8 Bits
Monosync, 6 Bits
Bisync, 16 Bits
Bisync, 12 Bits
SDLC
Figure 5-9. Write Register 7
UM010901-0601
5-11