h8s-2628 Renesas Electronics Corporation., h8s-2628 Datasheet - Page 384
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h8s-2628
Manufacturer Part Number
h8s-2628
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2628.pdf
(641 pages)
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Section 14 Serial Communication Interface (SCI)
with a 1 multiprocessor bit, the receive data is transferred to RDR. An RXI interrupt request is
generated at this time. All other SCI operations are the same as in asynchronous mode. Figure
14.12 shows an example of SCI operation for multiprocessor format reception.
Rev. 3.00 Oct 04, 2005 page 344 of 598
REJ09B0155-0300
MPIE
RDRF
RDR
value
MPIE
RDRF
RDR
value
1
1
Start
bit
Start
bit
0
0
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)
MPIE = 0
MPIE = 0
D0
D0
Figure 14.12 Example of SCI Operation in Reception
ID1
D1
D1
Data (ID1)
Data (ID2)
RXI interrupt
request
(multiprocessor
interrupt)
generated
RXI interrupt
request
(multiprocessor
interrupt)
generated
D7
D7
(a) Data does not match station’s ID
(b) Data matches station’s ID
MPB
MPB
1
1
RDR data read and
RDRF flag cleared
to 0 in RXI interrupt
service routine
RDR data read
and RDRF flag
cleared to 0 in
RXI interrupt
service routine
Stop
bit
Stop
bit
1
1
Start
bit
Start
bit
0
0
D0
D0
If not this station’s ID,
MPIE bit is set to 1
again
Matches this station’s ID,
so reception continues, and
data is received in RXI
interrupt service routine
D1
D1
Data (Data1)
Data (Data2)
ID2
ID1
D7
D7
MPB
MPB
0
0
RXI interrupt request is
not generated, and RDR
retains its state
Stop
bit
Stop
bit
1
1
MPIE bit set to 1
again
Idle state
(mark state)
Idle state
(mark state)
Data2
1
1
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