MC68306FC16 Datasheet, PDF (147/191 Pages) Motorola, Inc – Integrated EC000 Processor

CHCHK
CHCHK
PLACE CHANNEL IN
LOCAL LOOPBACK
MODE
ENABLE CHANNEL'S
TRANSMITTER
CLEAR CHANNEL
STATUS WORD
TxCHK
IS
TRANSMITTER
N
READY
?
SNDCHR ^Y
SEND CHARACTER
TO TRANSMITTER
RxCHK
HAS
RECEIVER
N
RECEIVED
CHARACTER
?
Y
N
WAITED
TOO LONG
?
Y
SET TRANSMITTER-
NEVER-READY FLAG
N
WAITED
Y
SET RECEIVER-
TOO LONG
NEVER-READY FLAG
?
A
B
Figure 6-10. Serial Module Programming Flowchart (2 of 5)
MOTOROLA
MC68306 USER'S MANUAL
6-39