HD64F3437TF16 Datasheet, PDF (301/752 Pages) Hitachi Semiconductor – 12 V must not be applied to the S-mask model (single-power-supply specification), as this may permanently damage the device.

Figure 12.11 shows an example of an SCI receive operation using a multiprocessor format (8-bit
data with multiprocessor bit and one stop bit).
MPIE
Start
Stop Start
Stop
1 bit
Data (ID1) MPB bit bit
Data (Data1) MPB bit
1
0 D0 D1
D7 1 1 0 D0 D1
D7 0 1 Idle state
(mark)
RDRF
RDR value
ID1
MPB detection RXI request RXI handler reads Not own ID, so
MPIE = 0
RDR data and clears MPIE is set to
RDRF to 0
1 again
(Multiprocessor interrupt)
No RXI request,
RDR not updated
(a) Own ID does not match data
MPIE
Start
Stop Start
Stop
1 bit
Data (ID2) MPB bit bit
Data (Data2) MPB bit
1
0 D0 D1
D7 1 1 0 D0 D1
D7 0 1 Idle state
(mark)
RDRF
RDR value
272
ID2
Data 2
MPB detection
MPIE = 0
RXI request RXI handler reads Own ID, so receiving MPIE set to
RDR data and clears continues, with data 1 again
RDRF to 0
received at each RXI
(Multiprocessor interrupt)
(b) Own ID matches data
Figure 12.11 Example of SCI Receive Operation
(8-Bit Data with Multiprocessor Bit and One Stop Bit)