[Milkymist-devel] Root cause of high speed problem with the last production batch of jtag pods
Adam Wang
adam at sharism.cc
Mon Feb 14 04:36:03 PST 2011
Hi,
Thanks Yanjun Luo for help on this bug-free!
The ground pads of C3, R14, C27 and C28, which their grounds are all
connected together to a locally same net and which doesn't connect globally
to system ground. So that functionalities about these four parts become
invalid.
See link for steps of rework and more:
http://en.qi-hardware.com/wiki/JTAG_Serial_Cable_run_1_for_Milkymist_One#Bugs,_Steps_of_Rework_and_Improvements
I'll rework the remaining pods.
-adam
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