HD6413002 Datasheet, PDF (485/700 Pages) Renesas Technology Corp – High-performance single-chip microcontroller

Figure 13-19 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 13-19 Example of SCI Receive Operation
Transmitting and Receiving Serial Data Simultaneously (Synchronous Mode): Figure 13-20
shows a sample flowchart for transmitting and receiving serial data simultaneously and indicates
the procedure to follow.
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