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Altera_Forum
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15 years ago

Cyclone III stuck at POR?

Hi, I have problems to get a custom board work, the FPGA seems to be stuck in POR. It's a PCIe card with a EP3C10F256C7N. I attached an excerpt of the schematic to this post. I have 10 pro...
Altera_Forum's avatar
Altera_Forum
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15 years ago

Hello Dave,

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Also probe your power supplies to make sure they power sequence within the recommended time.

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The 1.2V and 2.5V supplies are made from the 3.3V supply by linear regulators. In chapter 10 of the Cyclone III handbook I found this statement:

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The Cyclone III device family supports any power-up or

power down sequence (VCCIO, VCCINT) to simplify system level design.

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So, power sequencing isn't really a problem, right?

Regards,

Jürgen