Datasheet

Section 12 Serial Communication Interface (SCI)
Rev.7.00 Feb. 14, 2007 page 480 of 1108
REJ09B0089-0700
Figure 12.13 shows an example of SCI operation for multiprocessor format reception.
MPIE
RDR
value
0D0D1 D71 1 0D0D1 D7 01
1 1
Data (ID1)Start
bit MPB
Stop
bit
Start
bit
Data (Data1)
MPB
Stop
bit
RXI interrupt
request
(multiprocessor
interrupt)
generated
MPIE = 0
Idle state
(mark state)
RDRF
RDR data read
and RDRF flag
cleared to 0 in
RXI interrupt
handling routine
If not this station's ID,
MPIE bit is set to 1
again
RXI interrupt request is
not generated, and RDR
retains its state
ID1
(a) Data does not match station's ID
MPIE
RDR
value
0D0D1 D71 1 0D0D1 D7 01
1 1
Data (ID2)Start
bit
MPB
Stop
bit
Start
bit
Data (Data2)
MPB
Stop
bit
RXI interrupt
request
(multiprocessor
interrupt)
generated
MPIE = 0
Idle state
(mark state)
RDRF
RDR data read and
RDRF flag cleared
to 0 in RXI interrupt
handling routine
Matches this station's ID,
so reception continues, and
data is received in RXI
interrupt handling routine
MPIE bit set to 1
again
ID2
(b) Data matches station's ID
Data2ID1
Figure 12.13 Example of SCI Receive Operation
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)