I have a JTAG-HS3 programmer that is performing strangely.
When powered, it seems excessively warm.
I can use it to program my Zynq board if in JTAG boot mode, but it will not boot up unless I disconnect the programmer. I checked the reset line, and it is not being asserted by the programmer.
I tried a different unit and it works fine.
Is this a common failure mode?
I will be embedding a JTAG-HS3 in my test fixture for the Zynq board. If I remove power to the programmer, will the JTAG signals be high impedance? Should I insert buffer gates on TMS, TCK, and TDI to is