D12320VF25V Datasheet, PDF (502/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 12 Serial Communication Interface (SCI)
Figure 12.6 shows an example of the operation for transmission in asynchronous mode.
Start
1 bit
Data
Parity Stop Start
bit bit bit
Data
Parity Stop
bit bit
1
0 D0 D1
D7 0/1 1 0 D0 D1
D7 0/1
1
Idle state
(mark state)
TDRE
TEND
TXI interrupt
Data written to TDR and
TXI interrupt
request generated TDRE flag cleared to 0 in request generated
TXI interrupt handling routine
TEI interrupt
request generated
1 frame
Figure 12.6 Example of Transmit Operation in Asynchronous Mode
(Example with 8-Bit Data, Parity, One Stop Bit)
Rev.7.00 Feb. 14, 2007 page 468 of 1108
REJ09B0089-0700