HD64F36022 datasheet(237/384 Pages) RENESAS

237 / 384 page

Section 13 Serial Communication Interface 3 (SCI3)

Rev. 4.00 Sep. 23, 2005 Page 211 of 354

REJ09B0025-0400

Yes

<End>

Start reception

Yes

[4]

Clear RE bit in SCR3 to 0

Error processing

(Continued on

next page)

[5]

Yes

FER+OER = 1

RDRF = 1

All data received?

Set MPIE bit in SCR3 to 1

[1]

[2]

Read OER and FER flags in SSR

Read RDRF flag in SSR

[3]

Read receive data in RDR

Yes

[A]

This station’s ID?

Read OER and FER flags in SSR

Yes

Read RDRF flag in SSR

Yes

FER+OER = 1

Read receive data in RDR

RDRF = 1

[1]

Set the MPIE bit in SCR3 to 1.

[2]

Read OER and FER in SSR to check for

errors. Receive error processing is performed

in cases where a receive error occurs.

[3]

Read SSR and check that the RDRF flag is

set to 1, then read the receive data in RDR

and compare it with this station’s ID.

If the data is not this station’s ID, set the MPIE

bit to 1 again.

When data is read from RDR, the RDRF flag

is automatically cleared to 0.

[4]

Read SSR and check that the RDRF flag is

set to 1, then read the data in RDR.

[5]

If a receive error occurs, read the OER and

FER flags in SSR to identify the error. After

performing the appropriate error processing,

ensure that the OER and FER flags are all

cleared to 0.

Reception cannot be resumed if either of

these flags is set to 1.

In the case of a framing error, a break can be

detected by reading the RxD pin value.

Figure 13.17 Sample Multiprocessor Serial Reception Flowchart (1)

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