Typewriter User Manual

MOTOROLA MC68340 USER’S MANUAL 7- 45
POUCH
N
Y
IS
CHANNEL B
TRANSMITTER
READY
?
SEND CHARACTER
I
N D0 TO CHANNE
L
B TRANSMITTER
N
Y
POUCHI
POUTCHR
WAS
CHARACTER A
CARRIAGE
RETURN
?
IS
CHANNEL B
TRANSMITTER
READY
?
SEND A LINE
FEED CHARACTER TO
CHANNEL B
TRANSMITTER
N
RETURN
OUTCH
N
Y
IS
CHANNEL A
TRANSMITTER
READY
?
SEND CHARACTER
IN D0 TO CHANNEL A
TRANSMITTER
N
Y
OUTCHI
OUTCHR
WAS
CHARACTER A
CARRIAGE
RETURN
?
IS
CHANNEL A
TRANSMITTER
READY
?
SEND A LINE
FEED CHARACTER TO
CHANNEL A
TRANSMITTER
N
RETURN
Y
Y
Figure 7-10. Serial Module Programming Flowchart (5 of 5)
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I
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