CD1284 Datasheet, PDF (64/176 Pages) Intel Corporation – IEEE 1284-Compatible Parallel Interface Controller with Two High-Speed Asynchronous Serial Ports

CD1284 — IEEE 1284-Compatible Parallel Interface Controller
Figure 9. CD1284 Receive Character Processing
CHARACTER
RECEIVED
PARITY,
FRAMING, ^Y
OVERRUN
ERROR
?
N
SET ERRORED
CHAR FLAG
Y
BREAK
?
N
ISTRIP
Y
ENABLED
?
N
SET BREAK
FLAG
SET D7 = 0
N
CHAR MATCH
ON ERROR
ENABLED
?
Y
SCHR12
N
ENABLED
?
Y
LNEXT
FLAG
SET
?
N
Y _{CLEAR LNEXT}
FLAG
LNEXT
Y
MODE
ENABLED
?
N
CHAR
=
LNEXT
?
N
Y _{SET LNEXT}
FLAG
A
B
64
Datasheet