D12320VF25V Datasheet, PDF (511/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 12 Serial Communication Interface (SCI)
Figure 12.11 shows an example of SCI operation for transmission using the multiprocessor
format.
Start
1 bit
0 D0 D1
Data
Multi-
proces-
sor Stop
bit bit
Start
bit
Data
Multi-
proces- Stop
sor bit bit 1
D7 0/1 1 0 D0 D1
D7 0/1
1 ^{Idle state}
(mark state)
TDRE
TEND
TXI interrupt
request generated
Data written to TDR
and TDRE flag cleared to
0 in TXI interrupt handling
routine
TXI interrupt
request generated
1 frame
TEI interrupt
request generated
Figure 12.11 Example of SCI Transmit Operation
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)
Multiprocessor serial data reception: Figure 12.12 shows a sample flowchart for multiprocessor
serial reception.
The following procedure should be used for multiprocessor serial data reception.
Rev.7.00 Feb. 14, 2007 page 477 of 1108
REJ09B0089-0700