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Altera_Forum's avatar
Altera_Forum
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13 years ago

FPGA instability after reset

Hi all, I am working with a custom Cyclone IV E based HW that is suffering from strange startup instability. The HW runs fine under various stress tests and temperature ranges when programmed...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

I wish I knew, my developement kit (which boots fine) has certainly more decoupling components.

I guess some were omitted on my custom HW due to PCB constraints. As I understand - from the

documents and posts I've read - the critical supply for PLLs is VCCA. I understand what are the

recomandations, but what is sufficient...