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Altera_Forum's avatar
Altera_Forum
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12 years ago

Quartus 2 Chain debugger

I have a chain with 3 bs devices : 1 EP3SE200

2 EP3SE260

3 VSC82244

If i am in Quartus II programmer debug mode this chain is correct seen, all device id's are seen.

Also with our boundary scan test (jtagtooling there's no problem with this chain.

But if I am in the Quartus II programmer and try "auto detect" nothing is seen, this message appears : "Can't scan JTAG chain"

Also adding the devices manualy does not work, a "fail" appears.

Any idea ???

Thanks Hans

1 Reply

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

    The problem was(is) the VSC8244, to bypass the device according 1149.1 must be 1111 . The VSC8244 is ONLY: 0111.

    Quartus wants to put the device in Bypass during programming and uses 1111. This was causing the programming problem.

    Hans