SH7144_08 Datasheet, PDF (478/930 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series

13. Serial Communication Interface (SCI)
Table 13.11 shows the states of the SSR status flags and receive data handling when a receive
error is detected. If a receive error is detected, the RDRF flag retains its state before receiving
data. Reception cannot be resumed while a receive error flag is set to 1. Accordingly, clear the
OER, FER, PER, and RDRF bits to 0 before resuming reception. Figure 13.9 shows a sample flow
chart for serial data reception.
Table 13.11 SSR Status Flags and Receive Data Handling
SSR Status Flag
RDRF* OER FER PER Receive Data
Receive Error Type
1
1
0
0
Lost
Overrun error
0
0
1
0
Transferred to RDR Framing error
0
0
0
1
Transferred to RDR Parity error
1
1
1
0
Lost
Overrun error + framing error
1
1
0
1
Lost
Overrun error + parity error
0
0
1
1
Transferred to RDR Framing error + parity error
1
1
1
1
Lost
Overrun error + framing error +
parity error
Note: * The RDRF flag retains its state before data reception.
Rev.4.00 Mar. 27, 2008 Page 434 of 882
REJ09B0108-0400