Datasheet

Section 13 Serial Communication Interface (SCI)
Rev. 3.00 Sep. 28, 2009 Page 286 of 710
REJ09B0384-0300
MPIE
RDR
value
0D0D1 D71 1 0D0D1 D7 01
1
1
Data (ID1)Start
bit MPB
Stop
bit
Start
bit
Data (Data 1)
MPB
Stop
bit
Data (ID2)Start
bit
Stop
bit
Start
bit
Data (Data 2)
Stop
bit
RXI interrupt
request
(multiprocessor
interrupt)
generated
Idle state
(mark state)
RDRF
RDR data read
and RDRF flag
cleared to 0 in
RXI interrupt
service 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
MPB
MPB
RXI interrupt
request
(multiprocessor
interrupt)
generated
Idle state
(mark state)
RDRF
RDR data read and
RDRF flag cleared
to 0 in RXI interrupt
service routine
Matches this station’s ID,
so reception continues, and
data is received in RXI
interrupt service routine
MPIE bit set to 1
again
ID2
(b) Data matches station’s ID
Data 2ID1
MPIE = 0
MPIE = 0
Figure 13.12 Example of SCI Operation in Reception
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)