Honored ContributorHello
I Am using instantation megafuntions in vhdl. And generate it, many pins. Is possible to annul signals that are not in use of these megafunctions? Regards and Thanks
Honored ContributorWhat do you mean by annul?
You can connect the pins to any legal signal - but setting a pin to a constant value may affect functionality, depending on the pin. Why not specify what you are trying to do?Honored ContributorHello Tricky, First pardon for my english, it is not my native language.
I am trying to do a board with a cyclone the III or IV, for an university work. And it has to include the basic controllers, Bus PCI, controllers of memory SDRAM and Flash. I start by compiling only the megafunction of the bus PCI (pci_mt32) and appear 217 pines in the compilation (quartus 12.1) and 185 pines (quartus 9.1). They are a lots. I readed that for a basic bus with 47 or 49 pines is enough. I suppose that they are exceed pines and I do not need to use all the signals. Or am I doing something badly? Regards https://www.alteraforum.com/forum/attachment.php?attachmentid=8578 https://www.alteraforum.com/forum/attachment.php?attachmentid=8579 https://www.alteraforum.com/forum/attachment.php?attachmentid=8580Honored ContributorYou need to read the specs for what all the pins do to see if it is safe to tie them to '0'. '1' or leave them open.
