Rev. 1.0, 02/00, page 438 of 1141
Figure 22.12 shows an example of SCI operation for transmission using a multiprocessor format.
TDRE
TEND
0
1 frame
D0
D1
D7
0/1
1
0
D0
D1
D7
0/1
1
1
Data
Data
TXI interrupt
request
general
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
Start
bit
Multi-
processor
bit
Stop
bit
Start
bit
Stop
bit 1
Multi-
processor
bit
Figure 22.12 Example of SCI Operation in Transmission
(Example with 8-Bit Data, Multiprocessor Bit, One Stop Bit)
b. Multiprocessor Serial Data Reception
Figure 22.13 shows sample flowcharts for multiprocessor serial reception.
The following procedure should be used for multiprocessor serial data reception.