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Altera_Forum's avatar
Altera_Forum
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10 years ago

arithmetic mode for LE from vhdl

I have searched many threads for the solution and the answers were incomplete. So i try to do some investigation. this code in vhdl definitely put your counter in arithmetic mode for LE. if you ha...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

it is said about device arhitecture "LE carry chains—carry chains propagated serially through each LE within a LAB".

and Tricky said "it will be slower".

will it be ripple? if yes, what will be the reasonable width for such counter so we won't degradade in perfomance.

how to measure ratio for frequencies Fripple/Fclk. and we can divide long counter to some smaller ones.