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Honored Contributor
Honored ContributorJTAG pin sharing problem
I used the TDO, TDI, TCK as user I/O . The problem is that I can program at the first time with USB blaster but when I program again, it failed. I set the JTAG PIN afile:///C:/Users/Jack/AppDat...
Altera_ForumHonored Contributor
Honored Contributorthere is a bug on Quartus, so you need to affect TDO and use it as OUTPUT only;
from ALTERA/Support "Why can’t I access the MAX 10 device via JTAG even though JTAGEN is pulled high in user mode?" https://www.altera.com/support/support-resources/knowledge-base/solutions/rd03222016_95.html "How do I gain access to the JTAG pins of my MAX 10 device if I have enabled the JTAG pin sharing option, and the Quartus Prime Programmer is unable to auto detect the device?" https://www.altera.com/support/support-resources/knowledge-base/solutions/rd05192016_963.html
