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KJian6's avatar
KJian6
Icon for New Contributor rankNew Contributor
7 years ago

JTAG chain is broken when DDR4 is enable

Hi, I'm using ATTILA Arria10GX development kit with Quartus Prime 18.1.0 Build 222: 1, The JTAG works fine when my design system only has a NIOS II processor. 2, The JTAG chain will become ...
JohnT_Altera's avatar
JohnT_Altera
Icon for Regular Contributor rankRegular Contributor
7 years ago

HI,

Could you check on your board to see if the DDR4 connection is interfering with your JTAG Chain connection? I suspect that there is some signal integrity on your JTAG Chain connection.

Could you try to disable the DDR4 IP's JTAG debugger? I don't think it will be any difference.