SH7020 Datasheet, PDF (393/509 Pages) Renesas Technology Corp – SuperH™ RISC engine

Initialize
(1)
Start transmitting
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?
No (3)
Yes
Read TEND bit in SSR
TEND = 1?
No
Yes
Output break signal?
Yes
Set DR = 0
No
(4)
Clear TE bit to 0 in SCR;
select theTxD pin function as
an output port with the PFC
End
Note: Circled numbers refer to the preceding procedure.
Figure 13.10 Sample Flowchart for Transmitting Multiprocessor Serial Data
In transmitting serial data, the SCI operates as follows:
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