HD64F3664FPV Datasheet, PDF (246/446 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 14 Serial Communication Interface 3 (SCI3)
No
Yes
(A)
Start reception
Read OER, PER, and
FER flags in SSR
[1]
OER+PER+FER = 1
No
Yes
[4]
Error processing
(Continued on next page)
Read RDRF flag in SSR
[2]
RDRF = 1
Yes
Read receive data in RDR
All data received?
[3]
No
Clear RE bit in SCR3 to 0
[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.
<End>
Figure 14.8 Sample Serial Data Reception Flowchart (Asynchronous mode) (1)
Rev. 6.00 Mar. 24, 2006 Page 216 of 412
REJ09B0142-0600