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Altera_Forum's avatar
Altera_Forum
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13 years ago

what's non-inverted input pin ?

Hello, During complete my project, I stuck at a problem with pll. I use kit Cyclone III devlopment kit I try to use clock 50MHz to feed pll1 by pin AH15. During synthesing and analyzing it re...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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My kit is "cyclone III 3c120 dev"

Here is its link: http://www.altera.com/products/devkits/altera/kit-emb-dev-cyc3.html

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I've uploaded a simple blink-LEDs design. The design uses AH15 as the input clock and a PLL.

If you open the pin planner GUI (Assignments->Pin Planner) and zoom in on pins, it will show you the pin functions, eg., see the attached pin_planner.jpg which shows AH15 is DIFFCLK_7n/CLK12.

I had no problem assigning this pin using Quartus 11.1sp1. Could you please try building this example design - just open the design in Quartus and press the play button.

Cheers,

Dave