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Altera_Forum's avatar
Altera_Forum
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16 years ago

de2_70 fitter error!

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

7 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    16 years ago

    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's avatar
    Altera_Forum
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    16 years ago

    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's avatar
    Altera_Forum
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    16 years ago

    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's avatar
    Altera_Forum
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    14 years ago

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