Cyclone3 with HSMC data conversion board

mosgaard,

I've had the same issue with this dev board (actually why i signed up for the forums) There are pin descrepencies between the HSMC reference document PDF and the Dev Board reference document. the DevBoard reference PDF seems to be the correct one so far. Also, if you installed the reference designs, there is one called "cycloneiii_3c120_dev_golden_top" in the examples folder which you can import the pin assigments. This contains all the HSMC pins and are correct (I hope) .

Also, if you haven't already, make sure you define the IO standard for your clock pin as LVDS and define your clock_bar signal as such:

(clk_25_out is my pll output. this is copied straight from pin assignments)

ok clk_25_out i/o standard lvds yes

ok clk_25_out location pin_g6 yes

ok clk_25_out(n) location pin_g5 yes

You can get the latest reference examples/documentation here:

http://www.altera.com/products/devkits/altera/kit-cyc3-dsp.html#documentation