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Altera_Forum
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18 years ago

Cyclone II configuration problem

Dear all, I am using an EP2C50F672 Cyclone II FPGA and I am facing problems booting it from the EP2C16. All connections with MSEL and related config pins of FPGA are as advised in datasheet. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Check the quality of the Power Supplies. Make sure that there is enough current, and enough bypassing.

Also make sure that the value of the "weak pullups" is not too weak, as some of the signals you are connected to have internal pulldowns and you might not be getting above their trip point?

Also, can you directly JTAG into the Cyclone FPGA and get it runniing correctly?

Try that first to help isolate the issue between FPGA can run OK and FPGAa cannot config from Prom.