Rev. 1.0, 02/00, page 430 of 1141
Figure 22.6 shows an example of the operation for transmission in asynchronous mode.
TDRE
TEND
0
1 frame
D0
D1
D7
0/1
1
0
D0
D1
D7
0/1
1
1
1
Data
Start
bit
Parity
bit
Stop
bit
Start
bit
Data
Parity
bit
Stop
bit
TXI interrupt
request
generated
Data written to TDR1 and
TDRE flag cleared to 0
in TXI interrupt handling
routine
TEI interrupt request
generated
Idle state
(mark state)
TXI interrupt request
generated
Figure 22.6 Example of Operation in Transmission in Asynchronous Mode
(Example with 8-Bit Data, Parity, One Stop Bit)