Datasheet

Table Of Contents
Section 13 Serial Communication Interface
REJ09B0140-0900 Rev. 9.00 Page 435 of 846
Sep 16, 2010
H8S/2215 Group
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 13.14 Example of Communication Using Multiprocessor Format
(Transmission of Data H'AA to Receiving Station A)
13.5.1 Multiprocessor Serial Data Transmission
Figure 13.15 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.