Honored Contributor
Honored ContributorThanks for the note FvM. After playing with Quartus for a while, I finally found the place to
change the toggle rates. Initially the pins were set to LOCATION - <PIN# >. I changed them to Toggle Rate and set the freq to 0Hz. I tried the fitter again with no luck. Still the same error. I hope I did the right thing. Am I missing something? --- Quote Start --- The "number of outputs" problem only arises for outputs in a Vref group with voltage referenced inputs, e. g. SSTL-2 used with DDR2 memory. You obviously revealed why not all LEDs had been connected. Actually there is a trick for outputs not toggling during normal operation. You make Quartus fitter ignore these pins in placement rules check by specifying a toggle rate 0 as discussed in AN 466, Cyclone III Design Guidelines on page 16. --- Quote End ---
