Forum Discussion
Altera_Forum
Honored Contributor
Honored ContributorError: Differential I/O input pin clkin_125 is assigned to a non differential locati
Hello, I am using Quartus II v10.1 SP1 to compile for an Arria II GX (Altera ARRIA II GX Dev Board). I am trying to use the external differential clock in but I get the following error: ...
Altera_ForumHonored Contributor
Honored Contributor-use the MegaWizard to make a single channel ALTGX with a 125 MHz ref clock and put it into PRBS or BIST mode. all of the other settings shouldn't matter
-use the MegaWizard to make an ALTGX_RECONFIG. i think default settings are fine -instantiate each block. feed the ALTGX refclk the 125MHz clock. feed all of the reconfig clk and cal clk to the on board 50 MHz oscillator -connect the ALTGX block to the relevant ports on the ALTGX block. there should be data to reconfig, from reconfig, and possibly a busy signal -the BIST/PRBS will have pass/fail outputs, those can probably float -try a compilation, hopefully it works -if it works you can use the 125 MHz clock elsewhere stepping back, can't you use the 50 MHz or 100 MHz clock and a PLL to get 125 MHz?
