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Altera_Forum's avatar
Altera_Forum
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17 years ago

nStatus can't go high

I have just finished my pcb of EP3C25F324, but it can't work when I power on the board, all user IO pins stayed high, the nSTATUS remaid low, and nCONFIG statyed high. Is't the problem of POR? Or ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Hi,

I have the same problem. My device is EP3C55F484. I'm using JTAG and SFL to programm my EPCS16. All VCCIOs are 3.3V, VCCINT = 1.2V, VCCD_PLLs are 1.2V and VCCA = 2.5V. JTAG is powered by VCCA, TDI and TMS are tied to VCCA via 1k, TCK is tied to GND via 1k. MSEL: 0010.

When I power on my board nSTATUS stays low, nCONFIG stays high. I doublechecked all voltage levels and everythig was fine. I think that Cyclone can't exit POR but I don't understand why((