Can not dowload the code into my Altera

Discussion in 'VHDL' started by ecenus, Jan 19, 2009.

  1. ecenus

    ecenus

    Joined:
    Sep 22, 2008
    Messages:
    4
    I met a weird problem: I can download the code into my Altera chip EPM240T100 comfortably at the first time. But, I can not download the code again. The errors are:

    Error: Can't access JTAG chain
    Error: Operation failed.

    I tried to do "Auto Detect", still an error window popped out as

    Unable to scan device chain. Can't scan JTAG chain.

    Why???

    I appreciate your advice and tips!
    ecenus, Jan 19, 2009
    #1
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