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Altera_Forum
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15 years ago

Cyclone IV goes into an undefined state

:( I'm using EP4CE10E22C8, in AS MODE. I have +1.2V supply for VCCINT and VCCD_PLL1,2; +2.5V for VCCA1,2, and +3.3V for all VCCIOs. MSEL2 and MSEL0 grounded. MSEL1 is connected to +2.5V. All...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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Do you want to say, the FPGA is working correctly if VCCINT isn't delayed? If it's working neither, I expect an elementary hardware problem, e.g. unconnected exposed pad.

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Sorry for my English:

The delay is only an test

MY PROBLEM IS that nCONFIG signal goes low. Not only, but other signals (i.e. TDI, TMS) go low when theoretically they should keep on staying high.

Can I get information on power supply?

I used these components:

"MICROCHIP - MCP1825S" for 1.2Volt.

"NATIONAL SEMICONDUCTOR - LM1117T-2.5" for 2.5Volt

"LM2937-3.3" for 3.3Volt

this component can be good?