HD6417706 RENESAS [Renesas Technology Corp], HD6417706 Datasheet - Page 434

• Manufacturer Part Number: HD6417706
• Description: Renesas 32-Bit RISC Microcomputer Super RISC engine Family/SH7700 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Figure 14.16 shows an example of SCI receive operation using a multiprocessor format.
Rev. 4.00, 03/04, page 388 of 660
RDRF
RDRF
Serial
MPIE
Serial
value
MPIE
value
RDR
RDR
data
data
(multiprocessor interrupt)
RXI interrupt request
generated, MPIE = 0
1
interrupt) generated,
1
(multiprocessor
RXI interrupt
Start
Start
bit
bit
0
MPIE = 0
0
request
Figure 14.16 Example of SCI Receive Operation
D 0
D 0
(ID1)
Data
ID1
(ID2)
Data
D 1
D 1
and clears RDRF bit to 0
(a) Own ID does not matches data
Reads RDR data with
processing routine
D 7
D 7
the RXI interrupt
Reads RDR data with
(b) Own ID matches data
processing routine
the RXI interrupt
MPB
MPB
RDRF bit to 0
and clears
1
1
Stop
Stop
bit
bit
1
1
Start
Start
bit
0
bit
0
D 0
D 0
(data 1)
(Data 2)
Data
ID, so MPIE bit is
ID is not station's
Data
set to 1 again
continues unchanged
D 1
D 1
and data is received
by the RXI interrupt
ID is that of station,
processing routine
so reception
ID2
D 7
D 7
ID1
MPB
MPB
0
0
No RXI interrupt,
Stop
Stop
is maintained
bit
1
bit
1
RDR state
generated
(marking)
MPIE bit
(marking)
set to 1
Data2
again
Idling
Idling
1
1