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| SH7604 Datasheet, PDF (386/633 Pages) Hitachi Semiconductor – Hardware Manual | |||
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Figure 13.13 shows an example of SCI receive operation using a multiprocessor format.
Start Data
1 bit (ID1)
Serial
data
0 D0 D1
MPB
Stop Start Data
MPB bit bit (data 1)
D7 1 1 0 D0 D1
Stop
MPB bit
D7 0 1
1
Idle
(mark)
state
MPIE
RDRF
RDR
value
ID1
RXI interrupt request
(multiprocessor
interrupt)
generated, MPIE = 0
RXI interrupt handler
reads RDR data
and clears RDRF
bit to 0
ID is not this
processorâs ID,
so MPIE bit is
set to 1 again
No RXI
interrupt
generated;
RDR state
is held
Figure 13.13 Example of SCI Receive Operation
(Own ID Does Not Match Data, 8-Bit Data with Multiprocessor Bit and One Stop Bit)
370
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