SCD1284 INTEL [Intel Corporation], SCD1284 Datasheet - Page 66

• Manufacturer Part Number: SCD1284
• Description: IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports
• Manufacturer: INTEL [Intel Corporation]

CD1284 — IEEE 1284-Compatible Parallel Interface Controller
Figure 9. CD1284 Receive Character Processing (Continued)
66
N
PROCESSING
ERROR FLAG
PUT CHAR
HANDLING
HANDLING
BREAK
ENABLED
IN FIFO
N
FLAG
PARITY
PARITY
ERROR
PARITY
ERROR
IN FIFO
PUT 00
N
N
Y
Y
SET
CR/NL
= ‘011’
= ‘100’
SET
?
C
?
?
?
?
Y
Y
N
Y
DISCARD CHAR
PROCESSING
DISCARD CHAR
PUT FF,00, CHAR
ERROR FLAG
HANDLING
BREAK
CR OR NL
Y
MODE
PARITY
= ‘11’
Y
CHAR =
PARITY
ERROR
N
= ‘010’
Y
IN FIFO
SET
?
?
?
?
N
Y
N
N
PROCESSING
PUT FF, CHAR
COR4[7:5]
000 - No action
001 - NL to CR
010 - CR to NL
011 - CR to NL; NL to CR
100 - Discard CR
101 - Discard CR; NL to CR
110 - Discard CR
111 - Discard CR; NL to CR
HANDLING
PUT CHAR
BREAK
IN FIFO
PUT 00
MODE
CHAR =
Y
PARITY
ERROR
IN FIFO
= ‘10’
Y
= ‘001’
Y
IN FIFO
X’FF
?
?
?
N
N
N
SERVICE REQUEST
POST EXCEPTION
SERVICE REQUEST
POST EXCEPTION
PUT CHAR
IN FIFO
D
DONE
Datasheet
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