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The problem is usually related to TCK signal quality. Some JTAG actions, e.g. configuration download are working, other actions are not working.
In one case, JTAG was working well, after I put a small capacitor (22 pF) in parallel to the TCK pull-down resistor (near the FPGA).
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Thanks for your reply. Do you think there might be a problem with the SLD Hub? Because when I tried to get the SLD_NODE information by issuing the HUB_INFO Instruction like you have described in your earlier post, all I get returned is 0x0F. So I guess that means that no sld node is being detected somehow. So I am thinking there might be a problem with the SLD_HUB.
So is there a way for me to check if the SLD Hub is even implemented? and if it is, is it implemented correctly?
Thank You,
Jack
Honored Contributor
