Datasheet

Section 15 Serial Communication Interface (SCI, IrDA)
Page 906 of 1408 R01UH0309EJ0500 Rev. 5.00
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
Transmitting
station
Receiving
station A
(ID = 01)
Receiving
station B
(ID = 02)
Receiving
station C
(ID = 03)
Receiving
station D
(ID = 04)
Serial communication line
Serial
data
ID transmission cycle =
receiving station
specification
Data transmission cycle =
data transmission to
receiving station specified by ID
(MPB= 1) (MPB= 0)
H'01 H'AA
Legend:
MPB: Multiprocessor bit
Figure 15.10 Example of Communication Using Multiprocessor Format
(Transmission of Data H'AA to Receiving Station A)
15.5.1 Multiprocessor Serial Data Transmission
Figure 15.11 shows a sample flowchart for multiprocessor serial data transmission. For an ID
transmission cycle, set the MPBT bit in SSR to 1 before transmission. For a data transmission
cycle, clear the MPBT bit in SSR to 0 before transmission. All other SCI operations are the same
as those in asynchronous mode.