Multiprocessor Serial Data Transmission; Figure 14.10 Example Of Communication Using Multiprocessor Format (Transmission Of Data H'aa To Receiving Station A) - Renesas H8S Series Hardware Manual

Section 14 Serial Communication Interface (SCI)
Transmitting
Receiving
station A
(ID = 01)
Serial
data
Legend:
MPB: Multiprocessor bit
Figure 14.10 Example of Communication Using Multiprocessor Format
14.5.1

Multiprocessor Serial Data Transmission

Figure 14.11 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.
Rev. 6.00 Mar 15, 2006 page 350 of 570
REJ09B0211-0600
station
Receiving
station B
(ID = 02)
H'01
(MPB = 1)
ID transmission cycle =
receiving station
specification
(Transmission of Data H'AA to Receiving Station A)
Serial transmission line
Receiving
station C
(ID = 03)
H'AA
(MPB = 0)
Data transmission cycle =
Data transmission to
receiving station specified by ID
Receiving
station D
(ID = 04)