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RH0001's avatar
RH0001
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

What is Cyclone IV JTAG threshold specification and where is it fully documented ?

As far as I read it this is completely unclear in the data sheet, It states the inputs are schmitt and the hysteresis is 200mV for Vccio=3.3V BUT it fails to mention what the resulting VIL/VIH thresh...
  • RH0001's avatar
    RH0001
    Icon for Occasional Contributor rankOccasional Contributor
    6 years ago

    Thank you for your reply, that is the point of the question, that document DOES NOT specify VIH & VIL for the schmitt input!

    On page 12 it says there will be 200mV of hysteresis at 3.3V but FAILS to specify the resulting VIH & VIL.

    So perhaps someone could answer the question please ?