Boundary Scan questions

May 08, 2006 2 Replies

hi,



I am new to Boundary scan. I am looking at some IO IP and the vendor has input ports called CLOCKDR, UPDATEDR, SHIFTDR, MODE, and MODE1



I do not know what CLOCKDR, MODE and MODE1 are used for. I also don't know where the signals come from in terms of the TAP controller. Is CLOCKDR a logical AND of JTAG _TCK and SHIFTDR state?



Any help will be greatly appreciated.



huzaifa



hi,

I am new to Boundary scan. I am looking at some IO IP and the vendor has input ports called CLOCKDR, UPDATEDR, SHIFTDR, MODE, and MODE1

I do not know what CLOCKDR, MODE and MODE1 are used for. I also don't know where the signals come from in terms of the TAP controller. Is CLOCKDR a logical AND of JTAG _TCK and SHIFTDR state?

Any help will be greatly appreciated.

huzaifa

You have a lot of reading to do...

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Peter

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