Section 16 Serial Communication Interface 3 (SCI3)
Table 16.6 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 16.8 shows a sample flow chart
for serial data reception.
Table 16.6 SSR Status Flags and Receive Data Handling
SSR Status Flag
RDRF*
OER
FER
PER
Receive Data
Lost
Receive Error Type
Overrun error
1
0
0
1
1
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
1
0
0
1
0
1
1
1
Transferred to RDR
Transferred to RDR
Lost
Framing error
Parity error
Overrun error + framing error
Overrun error + parity error
Framing error + parity error
Lost
Transferred to RDR
Lost
Overrun error + framing error +
parity error
Note:
*
The RDRF flag retains the state it had before data reception.
Rev. 3.00 Sep. 10, 2007 Page 308 of 528
REJ09B0216-0300
RENESAS [ RENESAS TECHNOLOGY CORP ]
