HD6473032F Datasheet, PDF (378/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

Figure 11-19 shows an example of SCI receive operation.
Serial clock
Receive direction
Serial data
RDRF
Bit 7 Bit 0
Bit 7 Bit 0 Bit 1
ORER
RXI
request
RXI interrupt handler
reads data in RDR and
clears RDRF flag to 0
RXI
request
1 frame
Bit 6 Bit 7
Overrun error,
ERI request
Figure 11-19 Example of SCI Receive Operation
Transmitting and Receiving Serial Data Simultaneously (Synchronous Mode): Figure 11-20
shows a sample flowchart for transmitting and receiving serial data simultaneously and indicates
the procedure to follow.
363