HD6432351 datasheet(620/1025 Pages) RENESAS

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Section 13 Serial Communication Interface (SCI)

Rev. 3.00 Sep 15, 2006 page 586 of 988

REJ09B0330-0300

Table 13.11 Receive Errors and Conditions for Occurrence

Receive Error

Abbreviation

Occurrence Condition

Data Transfer

Overrun error

ORER

When the next data reception is

completed while the RDRF flag

in SSR is set to 1

Receive data is not

transferred from RSR to

RDR.

Framing error

FER

When the stop bit is 0

Receive data is transferred

from RSR to RDR.

Parity error

PER

When the received data differs

from the parity (even or odd) set

in SMR

Receive data is transferred

from RSR to RDR.

Figure 13.8 shows an example of the operation for reception in asynchronous mode.

RDRF

FER

1 frame

0/1

Data

Start

bit

Parity

bit

Stop

bit

Start

bit

Data

Parity

bit

Stop

bit

RXI interrupt

request

generated

ERI interrupt request

generated by framing

error

Idle state

(mark state)

RDR data read and RDRF

flag cleared to 0 in RXI

interrupt service routine

Figure 13.8 Example of SCI Operation in Reception

(Example with 8-Bit Data, Parity, One Stop Bit)

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