how to use smartIO LUT logical function

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befic_2639911
Level 2
Level 2
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Hi,

   smartIO has 8 LUTs. It can be configured as combinatorial with an output mapping,which is the truth table value.

   Can the output mapping be writed as an expression of input ,like its funtion?

   For example,the following picture,using an expression with right side operators or functions instead of figure 0x7f.

   how to do it?

lut.png

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1 Solution
BragadeeshV
Moderator
Moderator
Moderator
First question asked 1000 replies posted 750 replies posted

Hi beyows_2639911​,

This may not be possible. You need to frame a truth table to come up with an output mapping. Could you please let us know the difficulty you're facing with the function?

Regards,

Bragadeesh

Regards,
Bragadeesh

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BragadeeshV
Moderator
Moderator
Moderator
First question asked 1000 replies posted 750 replies posted

Hi beyows_2639911​,

This may not be possible. You need to frame a truth table to come up with an output mapping. Could you please let us know the difficulty you're facing with the function?

Regards,

Bragadeesh

Regards,
Bragadeesh
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Hi,Bragadeesh.

     the LUT is 3-inputs. in fact a 3-input truth table  is not complex for the combinatorial  logic.

    users hope it would be easy to achieve combinatorial  logic by an expression just as a programmble chip does.

     we can see something from LUT configuration window. it seems that there is  an easy way to do logic function with listed expression,operators ,etc,in the window.

      why does not  cypress supply this function?

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Hi beyows_2639911​,

We will consider your request and will file an enhancement request based on the same. Thank you for your interest in cypress products.

Regards,

Bragadeesh

Regards,
Bragadeesh
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