Renesas H8 Series Hardware Manual page 424

Section 10 Serial Communication Interface
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 10.20 Example of Operation when Receiving using Multiprocessor Format
Rev. 7.00 Mar 10, 2005 page 382 of 652
REJ09B0042-0700
Receive
data (ID1)
MPB
D0 D1 D7 1
1 frame
RXI 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 request
MPIE cleared
to 0
(b) When data matches this receiver's ID
(8-Bit Data, Multiprocessor Bit, 1 Stop Bit)
Stop Start Receive data
bit bit (Data1)
1 0 D0 D1
1 frame
RDRF cleared
to 0
RDR data read When data is not
this receiver's ID,
bit MPIE is set to
1 again
Stop Start Receive data
bit bit (Data2)
1 0 D0 D1
1 frame
ID2
RDRF cleared RXI request
to 0
RDR data read When data is
this receiver's
ID, reception
is continued
Stop Mark state
bit (idle state)
MPB
D7 0 1 1
ID1
No RXI request
RDR retains
previous state
Stop Mark state
bit (idle state)
MPB
D7 0 1 1
Data2
RDRF cleared
to 0
RDR data read
Bit MPIE set to
1 again