Motorola MC68306 User Manual page 147

CHCHK
CHCHK
PLACE CHANNEL IN
LOCAL LOOPBACK
MODE
ENABLE CHANNEL'S
TRANSMITTER
CLEAR CHANNEL
STATUS WORD
TxCHK
IS
TRANSMITTER
READY
?
SNDCHR
SEND CHARACTER
TO TRANSMITTER
RxCHK
HAS
RECEIVER
RECEIVED
CHARACTER
?
A
Figure 6-10. Serial Module Programming Flowchart (2 of 5)
MOTOROLA
N WAITED
TOO LONG
Y
N
WAITED
TOO LONG
Y
MC68306 USER'S MANUAL
N
Y
SET TRANSMITTER-
NEVER-READY FLAG
?
N
Y
SET RECEIVER-
NEVER-READY FLAG
?
B
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