SH7014 Datasheet, PDF (379/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

12. Serial Communication Interface (SCI)
Initialization
1
Start transmission
Read TDRE bit in SSR
2
No
TDRE = 1?
Yes
Write transmit data in TDR
and set MPBT in SSR
Clear TDRE bit to 0
All data transmitted?
Yes
Read TEND bit in SSR
No ₃
TEND = 1?
Yes
Output break signal?
Yes
Set DR = 0
No
No
4
Clear TE bit in SCR to 0;
select theTxD pin function as
an output port with the PFC
End transmission
Figure 12.10 Sample Flowchart for Transmitting Multiprocessor Serial Data
Rev.5.00 Sep. 27, 2007 Page 345 of 716
REJ09B0398-0500