Attn: Randy Dunlap,
It means Serial Peripheral Interface. Among other things it is one of
the modes of talking to MMC & SD cards, some LCD's, D/As etc. There may
be code in the SD09 SD055 drivers. It is a 3 or 4 wire interface -- clk,
in, out, and optional extra thing that I don't recall. I think it runs
up to about 25Mbits/s.
(not subscribed)
Garst
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