> "jtag> detect
> Warning: TDO seems to be stuck at 1"
> with many boards I tried.

Common causes for this are

- VREF input needed by jtag pod but not connected

- nTRST pulled down and not driven high by the jtag pod

- system reset inadvertently activated by jtag pod (but usually
   part detection is possible independent of system reset state)

>From memory I'm currently not sure about the JTAGkey tiny, whether it
always drives nTRST and/or requires VREF to be at a defined state

Kolja



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