Datasheet

UART Modules
12-36 MCF5206e USER’S MANUAL MOTOROLA
Y
N
CHCHK
PLACE CHANNEL IN
LOCAL LOOPBACK
MODE
ENABLE
TRANSMITTER CLEAR
STATUS WORD
IS
TRANSMITTER
READY
?
WAITED
TOO LONG
?
WAITED
TOO LONG
?
N
Y
SEND CHARACTER
TO TRANSMITTER
HAS
CHARACTER BEEN
RECEIVED
?
CHCHK
TxCHK
SNDCHR
RxCHK
N
YN
SET TRANSMITTER-
NEVER-READY FLAG
SET RECEIVER-
NEVER-READY FLAG
A
B
Y
N
Y
(NOTE: IN LOOPBACK MODE TRANSMITTER MUST BE
ENABLED, NOT RECEIVER)
Figure 11-9. UART Software Flowchart (2 of 5)
Fr
eescale S
emiconduct
or
, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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