Greetings. When I have my Microzed (Z7MB-7Z0x0-PCB-F) disconnected from my carrier board (MBCC-IO-PCB-C), I can power the Microzed via micro-USB, the green "power good" LED illuminates, I can connect to the JTAG, and program the device using Xilinx Tools.
However, if I plug the same Microzed into the carrier board and power via the carrier board's 5V barrel connector, I can no longer connect to the JTAG (and I have tried both the JTAG connector on the Microzed as well as the JTAG connector on the carrier card itself). I get the message "No devices detected on target" even though the Xilinx JTAG USB module shows a green LED. I still see the green LED illuminated on the Microzed, but the "PWR GOOD" LED on the carrier card is not illuminated. I checked and confirmed that the Microzed's jumper settings are correct for "JTAG" mode, and that the jumper settings on the carrier card match the "defaults" in the user guide.
Using a multimeter, I measured the following voltages relative to ground:
TP1 = 3.298V
J3+ = 1.791V
TP6 = 0.0V
TP7 = 0.0V
TP8 = 0.0V
TP9 = 0.0V
TP10 = 3.295V