SH7709S Datasheet, PDF (503/807 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
(2)
All data transmitted?
No
Yes
Read TEND bit in SCSSR
TEND = 1?
No
Yes
No
Break output?
Yes
(3)
Set SCPDR and SCPCR
Clear TE bit in SCSCR to 0
End of transmission
Note: Numbers in parentheses refer to steps in the preceding procedure description.
Figure 14.8 Sample Flowchart for Transmitting Serial Data
Rev. 5.00, 09/03, page 459 of 760