Section 16 Serial Communication Interface 3 (SCI3)
Start
bit
Receive
data (ID1)
Stop Start
bit bit
Receive data
(Data1)
Stop Mark state
bit
(idle state)
MPB
1
MPB
0
Serial
data
1
0
D0 D1
D7
1
0
D0 D1
1 frame
D7
1
1
1 frame
MPIE
RDRF
RDR
value
ID1
LSI
operation
RXI interrupt
request
MPIE cleared
to 0
RDRF flag
cleared
to 0
RXI interrupt request
is not generated, and
RDR retains its state
User
processing
RDR data read
When data is not
this station's ID,
MPIE is set to 1
again
(a) When data does not match this receiver's ID
Start
bit
Receive
data (ID2)
Stop Start
bit bit
Receive data
(Data2)
Stop Mark state
bit
(idle state)
MPB
1
MPB
0
Serial
data
1
0
D0 D1
D7
1
0
D0 D1
1 frame
D7
1
1
1 frame
MPIE
RDRF
RDR
value
ID1
ID2
Data2
LSI
operation
RXI interrupt
request
MPIE cleared
to 0
RDRF flag
cleared
to 0
RXI interrupt RDRF flag
request
cleared
to 0
User
processing
RDR data read
When data is
this station's
ID, reception
is continued
RDR data read
MPIE set to 1
again
(b) When data matches this receiver's ID
Figure 16.18 Example of SCI3 Reception Using Multiprocessor Format
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)
Rev. 3.00 Sep. 10, 2007 Page 324 of 528
REJ09B0216-0300
RENESAS [ RENESAS TECHNOLOGY CORP ]
