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Altera_Forum's avatar
Altera_Forum
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15 years ago

cyclone III vcca = 1.2v

because vcca connect 1.2v(must connect 2.5v) .jtag can't be successful;

I use EP3C16F484I7 ,package BGA ,

anybody can give me some advices ?

4 Replies

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

    You have to find a way to change the VCCA connection, otherwise the device is kept in reset. Without knowing your exact board layout, it's difficult to see if there's a possible workaround.

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

    The datasheet clearly specifies a VCCD_PLL voltage range. 2.5V must be expected to damage the chip, because it exceeds the absolute maximum rating of 1.8V.

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

    i see;

    i have to make a new pcb for this error;

    thanks for your help again;