Hitachi SH7709S Hardware Manual page 501

Note: Numbers in parentheses refer to steps in the preceding procedure description.
Figure 14.19 Sample Flowchart for Transmitting Serial Data
482
Start of transmission
Read TDRE bit in SCSSR
TDRE = 1?
Yes
Write transmit data to SCTDR
and clear TDRE bit in SCSSR to 0
All data transmitted?
Yes
Read TEND bit in SCSSR
TEND = 1?
Yes
Clear TE bit in SCSCR to 0
End of transmission
(1)
No
No
(2)
No