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 request
MPIE cleared
to 0
RDRF cleared
to 0
No RXI request
RDR retains
previous state
User
processing
RDR data read
When data is not
this receiver's ID,
bit 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 request
MPIE cleared
to 0
RDRF cleared
to 0
RXI request RDRF cleared
to 0
User
processing
RDR data read
When data is
this receiver's
ID, reception
is continued
RDR data read
Bit MPIE set to
1 again
(b) When data matches this receiver's ID
Figure 10-25 Example of Operation when Receiving using Multiprocessor Format
(8-bit data, multiprocessor bit, 1 stop bit)
317
ETC [ ETC ]
