HD6432621 Hitachi, HD6432621 Datasheet - Page 498

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

Figure 13-6 shows an example of the operation for transmission in asynchronous mode.
454
TDRE
TEND
TXI interrupt
request generated
1
Figure 13-6 Example of Operation in Transmission in Asynchronous Mode
Start
bit
0
Data written to TDR and
TDRE flag cleared to 0 in
TXI interrupt service routine
D0
D1
(Example with 8-Bit Data, Parity, One Stop Bit)
1 frame
Data
D7
Parity
bit
0/1
TXI interrupt
request generated
Stop
bit
1
Start
bit
0
D0
D1
Data
D7
Parity
bit
0/1
TEI interrupt
request generated
Stop
bit
1
Idle state
(mark state)
1