SH7050 Datasheet, PDF (444/841 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH RISC engine Family/

Section 13 Serial Communication Interface (SCI)
Initialization
1
Start transmitting/receive
Read TDRE bit in SSR
2
No
TDRE = 1?
Yes
Write transmission data in TDR
and clear TDRE bit of SSR to 0
Read ORER bit of SSR
ORER = 1?
No
Read RDRF bit of SSR
Yes
3
Error handling
4
No
RDRF = 1?
Yes
Read receive data of RDR,
and clear RDRF bit of SSR to 0 ⁵
All
No
data transmitted/and
received
Yes
Clear TE and RE bits of SCR to 0
End transmission/reception
Figure 13.22 Sample Flowchart for Serial Transmission
Rev. 5.00 Jan 06, 2006 page 424 of 818
REJ09B0273-0500