Renesas H8S Series Hardware Manual page 532

16-bit single-chip microcomputer

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Figure 14-13 shows an example of SCI operation for multiprocessor format reception.

Rev.6.00 Oct.28.2004 page 504 of 1016

REJ09B0138-0600H

RXI interrupt

(multiprocessor

RXI interrupt

(multiprocessor

Figure 14-13 Example of SCI Operation in Reception

(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)

RDR data read

If not this station's ID,

and RDRF flag

MPIE bit is set to 1

cleared to 0 in

RXI interrupt

service routine

(a) Data does not match station's ID

RDR data read and

Matches this station's ID,

RDRF flag cleared

so reception continues, and

to 0 in RXI interrupt

data is received in RXI

service routine

interrupt service routine

(b) Data matches station's ID

Data (Data1)

RXI interrupt request is

not generated, and RDR

retains its state

Data (Data2)

MPIE bit set to 1

(mark state)

(mark state)