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Figure 13-19 shows an example of SCI receive operation.
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Serial clock
Serial data
RDRF
ORER
RXI
request
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.
Receive direction
Bit 7
Bit 0
Bit 7
RXI interrupt
RXI
handler reads
request
data in RDR
and clears
RDRF flag to 0
1 frame
Figure 13-19 Example of SCI Receive Operation
Bit 0
Bit 1
489
Bit 6
Bit 7
Overrun error,
ERI request
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