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RZhen11's avatar
RZhen11
Icon for Occasional Contributor rankOccasional Contributor
3 years ago
Solved

SignalTap Invalid jtag (completely wiring dependent)

Dear support, This issue has haunted me since 16.1 till 22.1std. SinglTap is not reliable. And it is completely wiring dependent. I don't see hardware or setup issue, since reducing wiring will get...
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sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
3 years ago

Ah, thought it was in the design. So you're probably having issues with programming the device itself as well.

There's a JTAG Chain Debugger tool in Quartus you could try. That might help identify a board issue, especially if there are other devices on your JTAG chain.

  • RZhen11's avatar
    RZhen11
    Icon for Occasional Contributor rankOccasional Contributor
    3 years ago

    Hi sstrell,

    I've never had any issue programming, but when it's not "reliable" right after programming, I don't see SignalTap.