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Altera_Forum's avatar
Altera_Forum
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18 years ago

will Cyclone III work with unconected VCCA PLL ??

I actually made e board already and didn't connected thous VCCA PLL pins and now my board don't work (I can't program it and software all time is saying "can't access JTAG chain" is that because...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Success

my Cyclone III is alive I drilled hole to VCCA1 Pin and connected it to 2,6V supply.

For supply I used single Diode HER105 which dropped voltage by 0,6V and I get 2,6V on VCCA1 Pin.

So in my board all VCCIO banks are powered by 3,2V and i don't need additional 2,5V power supply I also left unconnected VCCA2 pin dos it have some impact on cyclone III ??? or I can leave it unconnected :)