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Rev. 5.00, 09/03, page 477 of 760
Start of transmission
Read TDRE bit in SCSSR
All data transmitted?
Yes
No
End of transmission
(1)
(2)
TDRE = 1?
Write transmit data to SCTDR
and clear TDRE bit in SCSSR to 0
Yes
No
Read TEND bit in SCSSR
TEND = 1?
Yes
No
Clear TE bit in SCSCR to 0
Note: Numbers in parentheses refer to steps in the preceding procedure description.
Figure 14.19 Sample Flowchart for Transmitting Serial Data