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Altera_Forum
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11 years ago

Quartus 14.0 Clock generation

Hello All, So i have a prototype where we use a 27MHz clock. A problem we are having is that Qsys can't make all the clocks. We can boot as far as UBOOT from NOR flash with CSEL on "10" with ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

So found the problem.

I had the EMAC configured to get out of reset on power good. The HPS uses the same power good. We did this because on a older prototype this solution works. But i geuss it's was no good practice. The EMAC needs a periode after power up in which you must not talk to the EMAC.

So we changed the setup, so now the EMAC powers-up before the HPS. And it works fine.

Thnx for all the hints and tip. Much appreciated.