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A
B
FRCHK
RSTCHN
DISABLE CHANNEL'S
TRANSMITTER
HAVE
FRAMING ERROR
?
N
Y
RESTORE CHANNEL
TO ORIGINAL MODE
SET FRAMING
ERROR FLAG
PRCHK
RETURN
HAVE
N
PARITY ERROR
?
Y
SET PARITY
ERROR FLAG
A
CHRCHK
GET CHARACTER
FROM RECEIVER
SAME
AS CHARACTER
TRANSMITTED
?
Y
N
SET INCORRECT
CHARACTER FLAG
B
Figure 7-10. Serial Module Programming Flowchart (3 of 5)
MOTOROLA
MC68340 USER’S MANUAL
7- 43
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