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Altera_Forum
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11 years ago

problem with JTAG configuration cyclone III

Hi, I am using cyclone III, epc3c10k. I have a problem of configuration from JTAG using usb blaster. Where I try to programming from quartus the JTAG can’t work. I connected the ncomfig, ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

thanks for your answers,

yes it's TQFP144 package. no the unused pad still in air (unconncted).

more description :

when i powred the card VCC I/O 2.5 V i have 1.1 V in all the I/O pin (i thing it should be between 2 and 2.5 V) and TCK voltage 1.83V (it's good value). But when i increase the voltage to 3.0 V or 3.3V i have 0 V in all the I/O pin and the TCK voltage 1.3 V.

and the current of VCC I/O 3.3V about 20 mA, when i powred 2.5 V the current about 18 mA. (i thing the current should be about 5 mA).

Thanks for your help.