H8S-2350 RENESAS [Renesas Technology Corp], H8S-2350 Datasheet - Page 626
H8S-2350
Manufacturer Part Number
H8S-2350
Description
16-Bit Single-Chip Microcomputer
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.H8S-2350.pdf
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Section 13 Serial Communication Interface (SCI)
Rev. 3.00 Sep 15, 2006 page 592 of 988
REJ09B0330-0300
No
No
No
Figure 13.12 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
Clear RE bit in SCR to 0
Read RDRF flag in SSR
Read RDRF flag in SSR
Read MPIE bit in SCR
All data received?
FER
FER
This station’s ID?
Start reception
Initialization
RDRF = 1
RDRF = 1
<End>
ORER = 1
ORER = 1
Yes
Yes
Yes
Yes
No
No
Yes
No
Yes
Error processing
[4]
[3]
[1]
[2]
(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 processing 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
processing, 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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