HD64F7051SFJ20V Datasheet, PDF (430/843 Pages) Renesas Technology Corp – Hardware Manual Renesas 32-Bit RISC

Section 13 Serial Communication Interface (SCI)
4. Output a break at the end of serial transmission: Set the data register (DR) of the port to 0, then
clear TE to 0 in SCR and set the TxD pin function as output port with the PFC.
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 13.11 Sample Flowchart for Transmitting Multiprocessor Serial Data
Rev. 5.00 Jan 06, 2006 page 408 of 818
REJ09B0273-0500