HD64F36022 datasheet(224/384 Pages) RENESAS

224 / 384 page

Section 13 Serial Communication Interface 3 (SCI3)

Rev. 4.00 Sep. 23, 2005 Page 198 of 354

REJ09B0025-0400

Yes

<End>

Start reception

[1]

Yes

Read RDRF flag in SSR

[2]

[3]

Clear RE bit in SCR3 to 0

Read OER, PER, and

FER flags in SSR

Error processing

(Continued on next page)

[4]

Read receive data in RDR

Yes

OER+PER+FER = 1

RDRF = 1

All data received?

[1] Read the OER, PER, and FER flags in

SSR to identify the error. If a receive

error occurs, performs the appropriate

error processing.

[2] Read SSR and check that RDRF = 1,

then read the receive data in RDR.

The RDRF flag is cleared automatically.

[3] To continue serial reception, before the

stop bit for the current frame is

received, read the RDRF flag and read

RDR.

The RDRF flag is cleared automatically.

[4] If a receive error occurs, read the OER,

PER, and FER flags in SSR to identify

the error. After performing the

appropriate error processing, ensure

that the OER, PER, and FER flags are

all cleared to 0. Reception cannot be

resumed if any of these flags are set to

1. In the case of a framing error, a

break can be detected by reading the

value of the input port corresponding to

the RxD pin.

(A)

Figure 13.8 Sample Serial Reception Data Flowchart (Asynchronous Mode)(1)

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