Hitachi H8/3062 Hardware Manual page 420

Single-chip microcomputer

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Figure 12.13 shows an example of SCI receive operation using a multiprocessor format.

RXI interrupt request

MPB detection

(multiprocessor interrupt)

MPB detection

a. Own ID does not match data

RXI interrupt request

(multiprocessor interrupt)

b. Own ID matches data

Figure 12.13 Example of SCI Receive Operation

(8-Bit Data with Multiprocessor Bit and One Stop Bit)

Data (data1)

RXI interrupt handler reads

RDR data and clears

RDRF flag to 0

Data (data2)

RXI interrupt handler

reads RDR data and

clears RDRF flag to 0

Not own ID, so MPIE

bit is set to 1 again

Own ID, so receiving

MPIE bit is set to

continues, with data

received by RXI

interrupt handler

No RXI interrupt

request, RDR not