HD6413008VF25 Datasheet, PDF (409/688 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

12. Serial Communication Interface
Communication Formats: Four formats are available. Parity bit settings are ignored when a
multiprocessor format is selected. For details see table 12.10.
Clock: See the description of asynchronous mode.
Transmitting
processor
Receiving
processor A
(ID = 01)
Serial communication line
Receiving
processor B
(ID = 02)
Receiving
processor C
(ID = 03)
Receiving
processor D
(ID = 04)
Serial data
H'01
(MPB = 1)
H'AA
(MPB = 0)
ID-sending cycle:
receiving processor address
Data-sending cycle:
data sent to receiving processor
specified by ID
Legend:
MPB : Multiprocessor bit
Figure 12.9 Example of Communication among Processors using Multiprocessor Format
(Sending Data H'AA to Receiving Processor A)
Transmitting and Receiving Data:
• Transmitting Multiprocessor Serial Data: Figure 12.10 shows a sample flowchart for
transmitting multiprocessor serial data and indicates the procedure to follow.
Rev.4.00 Aug. 20, 2007 Page 363 of 638
REJ09B0395-0400