HD6412320 RENESAS [Renesas Technology Corp], HD6412320 Datasheet - Page 674
HD6412320
Manufacturer Part Number
HD6412320
Description
Renesas 16-Bit Single-Chip Microcomputer H8S Family H8S-2300 Series
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6412320.pdf
(1302 pages)
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Section 14 Serial Communication Interface (SCI)
Rev.6.00 Sep. 27, 2007 Page 644 of 1268
REJ09B0220-0600
No
No
No
Figure 14.12 Sample Multiprocessor Serial Reception Flowchart
Read ORER and FER flags in SSR
Read ORER and FER flags in SSR
Read receive data in RDR
Read receive data in RDR
Read RDRF flag in SSR
Read RDRF flag in SSR
Clear RE bit in SCR to 0
Read MPIE bit in SCR
FER ∨ ORER = 1?
FER ∨ ORER = 1?
All data received?
Start of reception
This station's ID?
Initialization
RDRF = 1?
RDRF = 1?
<End>
Yes
Yes
Yes
Yes
No
No
Yes
No
Yes
[4]
[3]
[1]
[2]
Error handling
(Continued on
next page)
[5]
[1]
[2]
[3]
[4]
[5]
SCI initialization:
The RxD pin is automatically
designated as the receive data
input pin.
ID reception cycle:
Set the MPIE bit in SCR to 1.
SCI status check, ID reception
and comparison:
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, and
clear the RDRF flag to 0.
If the data is this station’s ID,
clear the RDRF flag to 0.
SCI status check and data
reception:
Read SSR and check that the
RDRF flag is set to 1, then read
the data in RDR.
Receive error handling and break
detection:
If a receive error occurs, read the
ORER and FER flags in SSR to
identify the error. After
performing the appropriate error
handling, ensure that the ORER
and FER flags are both 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.
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