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Figure 12.19 shows an example of SCI receive operation.
Serial clock
Serial data
RDRF
ORER
RXI interrupt
request
Bit 7
Bit 0
RXI interrupt handler
reads data in RDR and
clears RDRF flag to 0
1 frame
Figure 12.19 Example of SCI Receive Operation
Bit 7
Bit 0
Bit 1
RXI interrupt
request
Bit 6
Bit 7
Overrun error,
ERI interrupt
request
409
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