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Altera_Forum
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8 years ago

MAX 10 in place of Cyclone IV

Well, this seems fine to me, but I thought I'd ask the experts before doing it: I've made a VHDL design that's currently working on a Cyclone IV E. It uses the internal RAM (dual port mode), ab...
Altera_Forum's avatar
Altera_Forum
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8 years ago

If you hadn't told me that I'd have assumed I could chose a frequency between 55 and 116MHz, because that AN you posted (and the short description of the MAX 10 internal oscillator I've read) doesn't make it clear at all, at least to me, that what I'd actually get would be just a frequency within that range. I even added the Internal Oscillator IP to my project, and there's a CLOCK_FREQUENCY constant inside it set to 116. I was assuming I could change it to the frequency I need, expecting of course some error for being an RC oscillator.

But yeah, the MAX 10 datasheet says, on page 30, that for the 10M02 device I'll get a frequency of minimum 55, typical 82, and maximum 116MHz. They really should say this out loud on the AN496, and on the datasheet as well. Even on the features at https://www.altera.com/products/fpga/max-series/max-10/features.html because who'd be expecting such a wide variation?