HD6433640 HITACHI [Hitachi Semiconductor], HD6433640 Datasheet - Page 346

• Manufacturer Part Number: HD6433640
• Description: H8/3644 Series Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

340
Serial
data
MPIE
RDRF
RDR
value
LSI
operation
User
processing
RDR
value
Serial
data
MPIE
RDRF
LSI
operation
User
processing
Figure 10.25 Example of Operation when Receiving using Multiprocessor Format
1
1
Start
Start
bit
bit
0
0
D0
D0
ID1
D1
D1
(8-Bit Data, Multiprocessor Bit, 1 Stop Bit)
(a) When data does not match this receiver's ID
RXI request
MPIE cleared
to 0
data (ID1)
RXI request
MPIE cleared
to 0
data (ID2)
Receive
Receive
1 frame
1 frame
(b) When data matches this receiver's ID
D7
D7
MPB
MPB
1
1
RDRF cleared
to 0
RDR data read
RDRF cleared
to 0
RDR data read
Stop
Stop
bit
1
bit
1
Start
Start
bit
0
bit
0
D0
D0
1 frame
1 frame
D1
Receive data
D1
Receive data
ID2
(Data1)
(Data2)
When data is not
this receiver's ID,
MPIE is set to 1
again
When data is
this receiver's
ID, reception
is continued
RXI request
ID1
D7
D7
MPB
MPB
0
0
Stop
Stop
RDRF cleared
to 0
bit
bit
1
1
No RXI request
RDR retains
previous state
RDR data read
MPIE set to 1
again
Mark state
Mark state
(idle state)
(idle state)
Data2
1
1