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Altera_Forum's avatar
Altera_Forum
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12 years ago

number of M9K

I have a meory with size 8704*32. Iw ant to implement it on Cyclone 3 device. Megawizard shows that I need 31 M9K+ some LUts for this memory. Fitter fails and asks for 34 M9K. Any idea?
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

The 'Megawizard' seems to be assuming you can use all the bits - 8704*32/(9*1024) is 30.22, rounding up to 31.

This isn't true since you can't use the 9th bit (an M9K is actually 1k by 9 bits).

You could probably do something horrid in logic on top of 8192 by 36 bits (using two cycles for writes).