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Altera_Forum's avatar
Altera_Forum
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20 years ago

Highest CPU-Frequency for Cyclone I

Good morning. I`m new in this forum. I hope u will be able to answer my questions. The first should be rather trivial. What is the highest frequncy clock for a cyclone I? In my a...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

Hi,

if you are talking about NIOSII it depends mostly on the number of peripherals you add. I am having the same Problem at the moment, a small system with only SDRAM or SRAM controller and some custom logic gets to about 100MHz. If I add more peripherals, the system gets slower, especially with the other tristate avalon devices of the Devboard(1c20) and the DMA controller. Then fmax drops to about 60 MHz, which I am not really happy with.

Has someone else any experience on possible fmax of NIOS systems on Cyclone?