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Altera_Forum
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15 years ago

Cyclone III RAM usage

Hi, i am using a Cyclone III EP3C40 FPGA with 126 M9K Blocks. In my Design there is a SOPC-System with 3 NIOS II CPUs. I assigned 28 / 24 / 48 kBytes of onchip-Memory to the three RAMs. The 24k...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The megawizard and SOPC builder aren't always able to optimize properly the use of memory blocks when using a size that isn't a power of 2. You could use two memory blocks, one of 24k and another of 4k, and assign them consecutive addresses, but you'll need to use a custom link script if you want to use them as a single memory.