SH7709S Datasheet, PDF (521/807 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series

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