HD64F36049 datasheet(356/562 Pages) RENESAS

356 / 562 page

Section 17 Serial Communication Interface 3 (SCI3)

Rev. 3.00 Mar. 15, 2006 Page 324 of 526

REJ09B0060-0300

Yes

<End>

Start reception

[1]

Read RDRF flag in SSR

Read receive data in RDR

Clear RE bit in SCR3 to 0

[2]

[3]

Read OER, PER, and

FER flags in SSR

Error processing

(Continued on next page)

[4]

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 17.8 Sample Serial Reception Data Flowchart (Asynchronous Mode) (1)

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