Datasheet

Section 14 Serial Communication Interface 3 (SCI3)
Rev. 4.00 Mar. 15, 2006 Page 286 of 556
REJ09B0026-0400
Transmitting
station
Receiving
station A
Receiving
station B
Receiving
station C
Receiving
station D
(ID = 01) (ID = 02) (ID = 03) (ID = 04)
Serial transmission 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 14.15 Example of Inter-Processor Communication Using Multiprocessor Format
(Transmission of Data H'AA to Receiving Station A)
14.6.1 Multiprocessor Serial Data Transmission
Figure 14.14 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 SCI3 operations are the same
as those in asynchronous mode.