Hello,
On a newly purchased AUBoard-15P wirth original reference design loaded with no changes, we have stability issue with JTAG connection while using the onboard FTDI. The board is discovered in Vivado HW Manager initially, but after few minutes, the JTAG connection starts cycling on and off with pop-up in Vivado with "No HW target open" that promptly dissapears - with about 1-2s interval.
Sysmon data is getting corrupted with zero values being inserted in the plots. After some time Vivado crashes due to this problem.
The setup was tested with four different USB cables, three desktops, Vivado 2023.2 and 2024.2 both on Linux and Windows. FTDI drivers are updated to latest version.
Measured internal temperature of FPGA never goes above 45°C. Adding extra heatsink to FPGA had no effect past lowering the mesured temperature below 40°C.
Reading the devboard ERRATA, there is mention about JTAG functionality being impaired above 55°C - this sounds like some aspect of the design is marginal and some production units manifest the same problem even at lower temperatures.
Can you please elaborate on the errata and expected behaviour?
