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Altera_Forum's avatar
Altera_Forum
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13 years ago

Cyclone II pin 76

I have build my self a really nice CycloneII dev board :cool:

The chip on the board is EP2C5T144I8N

Everything is working splendidly! :D

The only problem is pin 76; when I try to write this pin as an I/O, in the .qsf file, the compiler says that its cant place multiple pins to pin 76. When I look dipper the compiler say that the other assignment is nCEO how can I remove this one so pin 76 will only be I/O? (I am only using this pin as I/O)

Thanks.

Noam.

3 Replies

  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    I made my own Cyclone II dev board too, with the same chip. To solve this error, go to menu bar:

    Assigments->Device->Device and pin Options

    go to category "Dual-Purpose Pins" and set nCEO as regular I/O pin. It will synthetize.
  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    Thanks! worked perfectly!

    Can I ask you what u used your dev board for, just out of pure hobby interest.. :)
  • Altera_Forum's avatar
    Altera_Forum
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    13 years ago

    I make a first board with a Cyclone 1 for a music synthesizer. I has a Cyclone, EPCS1, 50MHz osc, programming connectors and I/O connector. Then a think I can sell it for development and educational uses. So I made a motherboard with several peripheral: buttons, leds, displays, lcd, vga connector, USB-232, D/A.

    Then made a second board with Cyclone II because it has more internal RAM, so NIOS will fit easier. Now I'm thinking in Cylone III.

    Regards.

    Roberto.