HD6417034 Datasheet, PDF (428/691 Pages) Renesas Technology Corp – SuperH RISC ENGINE SH7032 AND SH7034

Figure 13.13 shows an example of SCI receive operation using a multiprocessor format.
Serial
data
Start
1 _bit
0 D₀
Stop Start
Data ID1 MPB bit bit
D₁
D₇ 1 1 0 D₀
Stop
Data 1 _MPB bit
1
D₁
D₇
0
1 ^{Idle (mark)}
state
MPB
MPIE
RDRF
RDR
value
ID1
RXI request,
(multiprocessor
interrupt) MPIE = 0
RXI interrupt
handler reads data
in RDR and clears
RDRF to 0
Not own ID,
so MPIE is
set to 1 again
No RXI
interrupt,
RDR maintains
state
Figure 13.13 Example of SCI Receive Operation (Own ID Does Not Match Data) (8-Bit
Data with Multiprocessor Bit and One Stop Bit)
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