Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

SignalTap sampling issues

Hi, I'm using Quartus II 7.0, and a Cyclone EP1C6F256. I'm trying to use SignalTap to look at some signals in the design. The SignalTap sample clock is the same as my design's clock - the output...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Thanks for all the suggestions. I discovered a pull-down resistor on the JTAG clock on the target board was missing - only an ac termination was there (RC in series to ground). Fitting the resistor has fixed the problem. I'm puzzled how I managed to program and verify the device, and run SignalTap at all, if there was a problem with the clock, though.

Cheers,

R