Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

VGA_CLK Pin on DE1?

Hi All,

We are using the UP VGA Core. Can someone tell us where's the pin location for VGA_CLK on DE1? It is not found in the DE1 Assignment Spreadsheet. For DE2, it is B8 but we are not sure whether it is the same for DE1.

Dennis

6 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor

    VGA_CLK is no more provided on the DE1 board,so you should geerate a clk for it by the PLL,and you should note its frequency!

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor

    Hi Peli,

    We are actually using the core in the SOPC system and used the External Clock module to generate the 25 MHz VGA Clock. The problem is we can't access the VGA core after it has been integrated into the SOPC system.

    I suspect that will be the case even if we are using a PLL. Please correct me if I am wrong.

    Thanks for your comments.

    Dennis
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor

    Hello,

    I cannot get the solution on this link.

    Can you please help me find the solution for where to connect vga_clk_out in case of DE1 board..?
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor

    Thank you. I got it.

    So I left that output OPEN (No pin assignment) & it worked.