Analog Devices ADSP-BF535 Blackfin, Hardware Reference Manual

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ADSP-BF535 Blackfin Processor Hardware Reference 11-71
Serial Port Controllers
Figure 11-43 and Figure 11-44 show non-continuous and continuous
transmission in the alternate framing mode. As noted previously for the
receive timing diagrams, the
TFS
output meets the
TFS
input timing
requirement.
Figure 11-45 and Figure 11-46 show the transmit operation with normal
framing and alternate framing, respectively, in the unframed mode. A sin-
gle frame sync signal occurs only at the start of the first word, either one
SCK
before the first bit (in normal mode) or at the same time as the first bit
(in alternate mode).
Figure 11-35. SPORT Receive, Normal Framing
Figure 11-36. SPORT Continuous Receive, Normal Framing
B 3 B 3 B 2 B 1 B 0 B 2 B 1 B 0
SC K
O U T P U T
R F S
D R
R F S I N PU T
S PO R T C on t r o l R eg is t er:
B o th I n te rn a l F ram i ng Op t io n an d E xt er n al F r am in g O p t io n Sh o w n
SC K
OU TPUT RFS
DR
RFS IN PUT
B 3 B 2 B1 B0 B3 B 2 B1 B0 B3 B 2
SPORT Control Re gister :
Both Inter nal Fr aming Option and Externa l Fra ming Opti on Shown