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Altera_Forum
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12 years ago

Why it wants mofr M9K blocks

Cyclone 3 - device has 66 M9K blocks. I set up 16384x36 memory chunk. It is 589824 bits, with device having 608256 bits. However quartus says it is too much, and says device needs to have 72 blo...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

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Wizard says block type "auto" and max block depth "auto". Resource really says 72 M9K.

I have played with number of words. Choosing 1024 gives 4 M9Ks, but choosing 2048 (twice more) gives 9 (nine!) M9Ks!

I also played with bus width and it seems to me that 9th bit of the M9Ks is being lost in my setup. When I set bus width to 32 bits, it properly displays 64 M9Ks.

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if you set width to 36, depth to 16384, block depth to 1024 or less you should get 64 M9Ks plus extra logic. Is that what you mean?