SH7751 Datasheet, PDF (750/1224 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

15. Serial Communication Interface (SCI)
Start of reception
Set MPIE bit to 1
RXI = 1 ?
No
Yes
Yes
User-defined receive start flag = 1?
No
Read ORER and FER flags in SCSSR1
Yes
FER or ORER = 1 ?
No
Read RDRF flag in SCSSR1
No
MPIE = 0 ?
Yes
Read receive data in SCRDR1
Set RDRF = 0 and MPIE = 1
No
This station's ID?
Yes
Set user-defined receive start flag to 1
End of ID reception handling
Read ORER and FER flags in SCSSR1
FER or ORER = 1 ?
Yes
No
Read receive data in SCRDR1
No
All data received?
Yes
Clear user-defined receive start flag to 0
RTE
End of data reception
Error handling
Figure 15.16 Sample Multiprocessor Serial Reception Flowchart (1)
Rev.4.00 Oct. 10, 2008 Page 652 of 1122
REJ09B0370-0400