D12320VF25V Datasheet, PDF (506/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 12 Serial Communication Interface (SCI)
Table 12.11 Receive Error Conditions
Receive Error
Overrun error
Framing error
Parity error
Abbreviation
ORER
FER
PER
Condition
When the next data reception is
completed while the RDRF flag
in SSR is set to 1
When the stop bit is 0
When the received data differs
from the parity (even or odd) set
in SMR
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
Figure 12.8 shows an example of the operation for reception in asynchronous mode.
Start
1 bit
Data
Parity Stop Start
bit bit bit
Data
Parity Stop
bit bit
1
0 D0 D1
D7 0/1 1 0 D0 D1
D7 0/1
0 ^{Idle state}
(mark state)
RDRF
FER
RXI interrupt
request
generated
RDR data read and RDRF
flag cleared to 0 in RXI
interrupt handling routine
ERI interrupt request
generated by framing
error
1 frame
Figure 12.8 Example of SCI Receive Operation
(Example with 8-Bit Data, Parity, One Stop Bit)
Rev.7.00 Feb. 14, 2007 page 472 of 1108
REJ09B0089-0700