SH7050 Datasheet, PDF (420/841 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH RISC engine Family/

Section 13 Serial Communication Interface (SCI)
Initialize
1
Start transmitting
Read TDRE bit in SSR
2
No
TDRE = 1?
Yes
Write transmission data to TDR
and clear TDRE bit in SSR to 0
All data transmitted?
3
No
Yes
Read TEND bit in SSR
No
TEND = 1?
Yes
Output break signal?
Yes
Set DR = 0
No
4
Clear TE bit in SCR to 0;
select theTxD pin as an
output port with the PFC
End transmission
Figure 13.5 Sample Flowchart for Transmitting Serial Data
Rev. 5.00 Jan 06, 2006 page 400 of 818
REJ09B0273-0500