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c. Serial Data Reception
Figure 16.15 shows sample flowcharts for serial reception.
No
Yes
[1] Set the receive trigger number
in
SCFCR.
[2] Reception is started when the
RE bit in SCSCR is set to 1.
[3] Read receive data while the
RDF bit is 1.
[4] After the end of reception, clear
the RE bit to 0.
Start of reception
Set receive trigger number in RTRG1
and RTRG0 in SCFCR
Set RE bit in SCSCR
When using receive FIFO data interrupt,
set RIE bit to 1
RDF =1?
Read receive trigger number of receive
data bytes from SCFRDR
Clear RE bit in SCSCR to 0
End of reception
[1]
[2]
[3]
[4]
Figure 16.15 Sample Serial Reception Flowchart (1)
(First Reception after Initialization)
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