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Altera_Forum
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10 years ago

Cyclone III I/Os assignment with Pin Planner

Hallo I am working with my project on EP3C16Q240. 240 pins, 160 I/Os. In my project i need to connect 100 buttons or knobs. I have got also 16-pin bidirectional data busbetween FPGA and ATXm...
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Altera_Forum
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10 years ago

1,2. I/O is just I/O, you can ignore diff_n, diff_p, dq, dqs, etc. The only exception is that dedicated clock pins can be used as general purpose INPUTS only.

3. These are dual purpose pins that can be used as general purpose I/O. If you mistakenly assign a special purpose pin to an I/O, Quartus will flag an error.

4. Uses BIDIR (bi-directional).