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Altera_Forum's avatar
Altera_Forum
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8 years ago

lpm functions and hdl

Hi all, So I'm trying to create a (synchronous) 8-bit loadable counter, as below but for some reason this synthesizes to around 28 LE's compared to the altera LPM 11 LE version. Any idea why? ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Yes and no :-) If you choose an LPM_ADDSUB the cost for the lpm function goes to 16+ LE's whereas the counter comes in as 8LE's + 8LUT's. So what's the best way to synthesize and up/down counter without +/-? Anyone know?

-Mux