Multiprocessor Serial Data Transmission; Figure 16.13 Example Of Communication Using Multiprocessor Format (Transmission Of Data H'aa To Receiving Station A) - Renesas H8S/2158 User Manual

Section 16 Serial Communication Interface (SCI, IrDA, and CRC)
Transmitting
Receiving
station A
(ID = 01)
Serial
data
Legend:
MPB: Multiprocessor bit
Figure 16.13 Example of Communication Using Multiprocessor Format (Transmission of
16.5.1

Multiprocessor Serial Data Transmission

Figure 16.14 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 SCI operations are the same
as those in asynchronous mode.
Rev. 3.00 Jan 25, 2006 page 432 of 872
REJ09B0286-0300
station
Receiving
station B
(ID = 02)
H'01
(MPB = 1)
ID transmission cycle =
receiving station
specification
Data H'AA to Receiving Station A)
Serial communication 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)