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Altera_Forum's avatar
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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Can I get information on power supply?

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As you're reporting "All these voltages are good", I don't see a need to discuss about the involved power supply. I have to assume, that the measurement is correct.

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Not only, but other signals (i.e. TDI, TMS) go low when theoretically they should keep on staying high.

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You mean, they are forced low by the FPGA? NCONFIG, TDI and TMS should have pull-up resistors, so are you sure, that the resistors are still supplied with 2.5 respectively 3.3V?