We have a Xilinx VC709 board. We had it plugged into PCIe slot on one computer, and then had the Digilent USB/JTAG interface connected to a second computer to remotely re-program the VC709 BPI flash. This worked fine for a day or two, and then the interface stopped working (Digilent no longer appeared in Vivado HWM, nor in host Win10 Device Man).
We ordered a new SMT2 and swapped out the failed interface. The VC709 programmer now works correctly.
However, to hopefully prevent this happening again (we must have had a ground loop...) we would like to purchase an in-line USB isolator. One we are considering does not drive the 5V line on the USB cable, so that line will be 0V at the SMT2 UBS connector input.
My question - by what means does the SMT2 sense connection to Vivado HWM? Is it via detection of the USB 5V line?
In other words, if the USB cable 5Vpin is 0V, will the SMT2 still enumerate to the host (i.e., operate correctly)?
Question
eskull
Hello,
We have a Xilinx VC709 board. We had it plugged into PCIe slot on one computer, and then had the Digilent USB/JTAG interface connected to a second computer to remotely re-program the VC709 BPI flash. This worked fine for a day or two, and then the interface stopped working (Digilent no longer appeared in Vivado HWM, nor in host Win10 Device Man).
We ordered a new SMT2 and swapped out the failed interface. The VC709 programmer now works correctly.
However, to hopefully prevent this happening again (we must have had a ground loop...) we would like to purchase an in-line USB isolator. One we are considering does not drive the 5V line on the USB cable, so that line will be 0V at the SMT2 UBS connector input.
My question - by what means does the SMT2 sense connection to Vivado HWM? Is it via detection of the USB 5V line?
In other words, if the USB cable 5Vpin is 0V, will the SMT2 still enumerate to the host (i.e., operate correctly)?
Thank you.
Link to comment
Share on other sites
1 answer to this question
Recommended Posts
Archived
This topic is now archived and is closed to further replies.