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Section 10 Serial Communication Interface
Rev. 6.00 Sep 12, 2006 page 319 of 526
REJ09B0326-0600
Receiving:
Figure 10.13 shows an example of a flowchart for data reception. This procedure
should be followed for data reception after initializing SCI3.
Start
End
Read bits OER,
PER, FER in SSR
1
2
3
4
Read bit RDRF
in SSR
Read receive
data in RDR
Clear bit RE to
0 in SCR3
Yes
OER + PER
+ FER = 1?
No
RDRF = 1?
Yes
Continue data
reception?
No
No
Yes
Receive error
processing
(A)
Read bits OER, PER, and FER in the
serial status register (SSR) to determine
if there is an error. If a receive error has
occurred, execute receive error
processing.
Read SSR and check that bit RDRF is
set to 1. If it is, read the receive data
in RDR. When the RDR data is read,
bit RDRF is cleared to 0 automatically.
When continuing data reception, finish
reading of bit RDRF and RDR before
receiving the stop bit of the current
frame. When the data in RDR is read,
bit RDRF is cleared to 0 automatically.
If a receive error has occurred, read bits
OER, PER, and FER in SSR to identify
the error, and after carrying out the
necessary error processing, ensure that
bits OER, PER, and FER are all cleared
to 0. Reception cannot be resumed if
any of these bits is set to 1. In the case
of a framing error, a break can be
detected by reading the value of the RXD
pin.4.
1.
2.
3.
4.
Figure 10.13 Example of Data Reception Flowchart (Asynchronous Mode)
Summary of Contents for F-ZTAT H8/3642A Series
Page 6: ...Rev 6 00 Sep 12 2006 page iv of xx ...
Page 8: ...Rev 6 00 Sep 12 2006 page vi of xx ...
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Page 124: ...Section 5 Power Down Modes Rev 6 00 Sep 12 2006 page 102 of 526 REJ09B0326 0600 ...
Page 188: ...Section 6 ROM Rev 6 00 Sep 12 2006 page 166 of 526 REJ09B0326 0600 ...
Page 190: ...Section 7 RAM Rev 6 00 Sep 12 2006 page 168 of 526 REJ09B0326 0600 ...
Page 298: ...Section 9 Timers Rev 6 00 Sep 12 2006 page 276 of 526 REJ09B0326 0600 ...
Page 378: ...Section 12 A D Converter Rev 6 00 Sep 12 2006 page 356 of 526 REJ09B0326 0600 ...
Page 446: ...Section 13 Electrical Characteristics Rev 6 00 Sep 12 2006 page 424 of 526 REJ09B0326 0600 ...