EXPANSION
ARCHITECTURE
OVERVIEW
As shown in Figure
3.1,
"Expansion Architecture Overview," the ex-
pansion bus
is
implemented as backplane (an expansion box) which
accept
PlCs (boards). The recommended number of PlCs to a back-
plane is five.
Due to timing considerations,
it
is not possible to daisy-chain more
than two buffered backplanes without inserting wait states.
NOTE
You should also take extreme care in controlling signal
radiation from your product, in order to pass FCC class
B
regulations.
Figure
3.1.
Expansion Architecture Overview
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