Figure 14.19 Example Of Sci3 Reception Using Multiprocessor Format (Example With 8-Bit Data, Multiprocessor Bit, One Stop Bit) - Renesas H8 Series Hardware Manual

Section 14 Serial Communication Interface 3 (SCI3)
Start
bit
Serial
1 0
data
MPIE
RDRF
RDR
value
LSI
operation
User
processing
Start
bit
Serial
1 0
data
MPIE
RDRF
RDR
value
LSI
operation
User
processing
Figure 14.19 Example of SCI3 Reception Using Multiprocessor Format
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)
Rev. 3.00 Sep. 14, 2006 Page 234 of 408
REJ09B0105-0300
Receive
data (ID1) MPB
D0 D1 D7 1
1 frame
RXI interrupt
request
MPIE cleared
to 0
(a) When data does not match this receiver's ID
Receive
data (ID2)
MPB
D0 D1 D7 1
1 frame
ID1
RXI interrupt
request
MPIE cleared
to 0
(b) When data matches this receiver's ID
Stop Start Receive data
bit bit (Data1)
1 0 D0 D1
1 frame
RDRF flag
cleared
to 0
RDR data read When data is not
this station's ID,
MPIE is set to 1
again
Stop Start Receive data
bit bit (Data2)
1 0 D0 D1
1 frame
ID2
RDRF flag RXI interrupt
cleared request
to 0
RDR data read When data is
this station's
ID, reception
is continued
Stop Mark state
MPB bit (idle state)
D7 0 1 1
ID1
RXI interrupt request
is not generated, and
RDR retains its state
Stop Mark state
bit (idle state)
MPB
D7 0 1 1
Data2
RDRF flag
cleared
to 0
RDR data read
MPIE set to 1
again