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Table 16-11 Receive Errors and Conditions for Occurrence
Receive Error
Overrun error
Framing error
Parity error
Figure 16-8 shows an example of the operation for reception in asynchronous mode.
Start
1
bit
0
D0
RDRF
FER
628
Abbreviation
Occurrence Condition
ORER
When the next data reception is
completed while the RDRF flag
in SSR is set to 1
FER
When the stop bit is 0
PER
When the received data differs
from the parity (even or odd) set
in SMR
Data
Parity
bit
D1
D7
RXI interrupt
request
generated
1 frame
Figure 16-8 Example of SCI Operation in Reception
(Example with 8-Bit Data, Parity, One Stop Bit)
Stop
Start
bit
bit
0/1
1
0
D0
RDR data read and RDRF
flag cleared to 0 in RXI
interrupt service routine
Data Transfer
Receive data is not
transferred from RSR to
RDR.
Receive data is transferred
from RSR to RDR.
Receive data is transferred
from RSR to RDR.
Data
Parity
bit
D1
D7
0/1
ERI interrupt request
generated by framing
error
Stop
bit
1
Idle state
0
(mark state)
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