hi.i have altera de2-70 board.quartus always eroring SW on fitter .Error: Can't place multiple pins assigned to pin location Pin_AD25 (IOC_X95_Y2_N1) Info: Pin SW is assigned to pin location Pin_AD25 (IOC_X95_Y2_N1) Info: Pin ~LVDS195p/nCEO~ is assigned to pin location Pin_AD25 (IOC_X95_Y2_N1) Info: Fitter preparation operations ending: elapsed time is 00:00:00 Error: Can't fit design in device Error: Quartus II Fitter was unsuccessful. 2 errors, 0 warnings Error: Peak virtual memory: 237 megabytes Error: Processing ended: Tue Jun 16 21:28:52 2009 Error: Elapsed time: 00:00:06 Error: Total CPU time (on all processors): 00:00:04 Error: Quartus II Full Compilation was unsuccessful. 4 errors, 48 warnings
Dear Speak48,When using iSW of the DE2-70 board there is a problem with PIN_AD25 that is default assigned for two purposes. Messages look similar to: info: pin ~lvds195p/nceo~ is reserved at location ad25 error: can't place pins assigned to pin location pin_ad25 (ioc_x95_y2_n1) info: pin isw is assigned to pin location pin_ad25 (ioc_x95_y2_n1) Steps:
- In Quartus-II select menu Assignments>Device...
- Select button "device and pin options..."
- Select the tab "Dual-Purpose Pins"
- Under the list of "Dual-purpose pins:" change the "Value" property of nCEO to "Use as regular I/O".
- Click ok
SanMao - thanks for the clear explanation. I had this problem and couldn't figure out what the heck was going on until I read your post, found through a google search.