SH7052 Datasheet, PDF (509/919 Pages) Renesas Technology Corp – SuperHTM RISC engine

Figures 14.15 and 14.16 show examples of SCI receive operation using a multiprocessor format.
Serial
data
Start Data
1 _{bit (ID1)}
0 D0 D1
Stop Start Data
MPB bit bit (data 1)
D7 1 1 0 D0 D1
Stop
MPB bit
1
D7 0 1 Idling
(marking)
MPB
MPIE
RDRF
RDR
value
ID1
RXI interrupt request
(multiprocessor
interrupt), MPIE = 0
RXI interrupt handler
reads data in RDR
and clears RDRF to 0
Not station’s
ID, so MPIE is
set to 1 again
No RXI interrupt,
RDR maintains
state
Figure 14.15 SCI Receive Operation (ID Does Not Match)
(Example: 8-Bit Data with Multiprocessor Bit and One Stop Bit)
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