HD6417144 RENESAS [Renesas Technology Corp], HD6417144 Datasheet - Page 485

• Manufacturer Part Number: HD6417144
• Description: 32-Bit RISC Microcomputer SuperHTM RISC engine Family/SH7144 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Figure 13.13 Sample Multiprocessor Serial Reception Flowchart (1)
No
No
No
Read ORER and FER flags
Read ORER and FER flags
Read receive data in RDR
Read receive data in RDR
Set MPIE bit in SCR to 1
Read RDRF flag in SSR
Read RDRF flag in SSR
Clear RE bit in SCR to 0
All data received?
This station’s ID?
FER∨ORER = 1
FER∨ORER = 1
Start reception
Initialization
RDRF = 1
RDRF = 1
in SSR
in SSR
<End>
Yes
Yes
Yes
Yes
No
No
Yes
No
Error processing
Yes
(Continued on
[3]
[1]
[2]
next page)
[4]
[5]
[1] SCI initialization:
[2] ID reception cycle:
[3] SCI status check, ID reception and
[4] SCI status check and data reception:
[5] Receive error processing and break
13. Serial Communication Interface (SCI)
Rev.4.00 Mar. 27, 2008 Page 441 of 882
Set the RxD pin using the PFC.
Set the MPIE bit in SCR to 1.
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.
Read SSR and check that the RDRF
flag is set to 1, then read the data in
RDR.
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 all 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.
REJ09B0108-0400