On Tue, May 3, 2011 at 7:41 PM, William "Chops" Westfield <westfw@mac.com>w=
rote:

>  a LUT provides a logical output capable of computing ANY logical
> equation based on its inputs.
> Given three inputs, there are only 8 possible outputs.  I think of a
> LUT as an array of bits, addressed by the inputs.  You get to specify
> the array contents (and thus the logic function) as part of the device
> programming.  On many devices, the LUT may actually be implemented as
> a RAM array of bits, but I don't think that that is actually required.
> Other implementations are possible.
>

So do the three inputs of the LUT select its function, or provide the data
to be computed?


> So if you wanted to implement an AND function, your 3-bit LUT would
> have zeros in all the table locations except the one corresponding to
> 1 1 1 inputs.
>

Oh! So one would select the LUT functionality based on known inputs and
outputs, as in AND(1, 1) -> 1?
--=20
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