Section 17 Synchronous Serial Communication Unit (SSU)
Rev. 1.00 Mar. 12, 2008 Page 574 of 1178
REJ09B0403-0100
Yes
[1]
[2]
[3]
[4]
[5]
[6]
[1] Initial
setting:
Specify the receive data format.
[2] Start
reception:
When SSRDR is dummy-read with RE = 1, reception is
started.
[3], [6] Receive error processing:
When a receive error occurs, execute the designated error
processing after reading the ORER bit in SSSR. After that,
clear the ORER bit to 0. While the ORER bit is set to 1,
transmission or reception is not resumed.
[4]
To continue single reception:
When continuing single reception, wait for time of t
SUcyc
while the RDRF flag is set to 1 and then read receive data
in
SSRDR.
The next single reception starts after reading receive data
in
SSRDR.
[5]
To complete reception:
To complete reception, read receive data after clearing the
RE bit to 0. When reading SSRDR without clearing the RE
bit, reception is resumed.
No
Yes
Yes
No
Start
Initial setting
RE = 1 (reception started)
Dummy-read SSRDR
Read SSSR
RDRF = 1?
ORER = 1?
Consecutive data
reception?
Read received data in SSRDR
RDRF automatically cleared
RE = 0
Read receive data in SSRDR
End reception
Overrun error processing
Clear ORER in SSSR
End reception
Note: Hatching boxes represent SSU internal operations.
No
Figure 17.8 Flowchart Example of Data Reception (SSU Mode)
(4) Data
Transmission/Reception
Figure 17.9 shows a flowchart example of simultaneous transmission/reception. The data
transmission/reception is performed combining the data transmission and data reception as
mentioned above. The data transmission/reception is started by writing transmit data to SSTDR
with TE
=
RE
=
1.
Содержание H8S Family
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Страница 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
Страница 588: ...Section 15 Serial Communication Interface with FIFO SCIF Rev 1 00 Mar 12 2008 Page 540 of 1178 REJ09B0403 0100...
Страница 632: ...Section 17 Synchronous Serial Communication Unit SSU Rev 1 00 Mar 12 2008 Page 584 of 1178 REJ09B0403 0100...
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