HD6432621 Hitachi, HD6432621 Datasheet - Page 507

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

Figure 13-11 shows an example of SCI operation for transmission using the multiprocessor
format.
request generated
TDRE
TEND
Multiprocessor serial data reception
Figure 13-12 shows a sample flowchart for multiprocessor serial reception.
The following procedure should be used for multiprocessor serial data reception.
TXI interrupt
1
Start
bit
0
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)
Data written to TDR
and TDRE flag cleared to
0 in TXI interrupt service
routine
Figure 13-11 Example of SCI Operation in Transmission
D0
D1
1 frame
Data
D7
Multi-
proce-
ssor
bit
0/1
TXI interrupt
request generated
Stop
bit
1
Start
bit
0
D0
D1
Data
D7
Multi-
proces-
sor bit
0/1
TEI interrupt
request generated
Stop
bit
1
Idle state
(mark state)
1
463