de2_70 fitter error!

[Altera_Forum]

hi.i have altera de2-70 board.quartus always eroring SW[7] on fitter . 

  Error: Can't place multiple pins assigned to pin location Pin_AD25 (IOC_X95_Y2_N1)  Info: Pin SW[7] 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

[Altera_Forum]

Dear Speak48, 

 When using iSW[7] 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[7] 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

Good Luck!   edit: removed original screenshots...

[Altera_Forum]

i think sanmao has the issue explained well. 

 however are you trying to embed images here? i get a prompt to put in my password for a .tw site...

[Altera_Forum]

Dear thepancake, 

 thanks for pointing me out to this! Apparently images are not uploaded to http://www.alterforum.com . So I removed the unaccessable links to obvious screenshots.

[Altera_Forum]

thank you brother!

[Altera_Forum]

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.

[Altera_Forum]

Thanks. It solved the problem...

[Altera_Forum]

Fantastic! I was scratching my head over this issue today till i finally found this post.. Well explained..:)