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Altera_Forum
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10 years ago

Nios2 core usage of memory blocs M4K x M9K

I was playing with a cheap development kit based on the Cyclone-II which did not suffice to fit a specific design. More precisely, it was required 30 M4K memory blocs, whereas the chip on the dev ...
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Altera_Forum
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10 years ago

1. M9K has 9000 bits of memory versus M4K of 4000 bits of memory. Representing about 2x more in memory capacity

2. Quartus looks at the memory size per RAM instance, ie depth + width instantiated and hook up X number of memory blocks together. I would aspect about 2:1 ratio.

Example, previously you have a system with a RAM of size 15kBytes (30 * 4000bits). So now you use 13 of them on Cyclone III 15kBytes * 8 / 9000 bits.