Minimal JTAG connector

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#1
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This must be well documented: What are the bare minimum JTAG connections to support code debugging from AVR studio? I'm trying to save space on the board and need a minimal connector. Any favorite solutions?

Mike

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TCK, TDI, TDO, TMS, TRST is 5. Plus power and ground depending on setup.

We've just got these 5 nets routed to tiny pads on the edge of the board, making sure there're no components directly underneath. Made up a little jig which clips over the side of the PCB, works a treat and has a total footprint of about 5mm x 1mm on each side. If you are feeling even more keen you could probably move some connections to the underside, halving the footprint again.

I'm lucky though that we've got an elite mechanical-type dude who could make the sexy clip, if it'd been up to me I probably would have used wire and blutack without nearly as much success ;)

-S.

EDIT: Just re-read your post, did you mean avrstudio or avr32studio? The above advice is good for the avr32. If you meant an 8-bit AVR then a) this is in the wrong forum but b) you can do without the TRST line :)

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You should have the RESET line wired as well, and for UC3 devices you do not need the TRST line IIRC. AP7 devices needs everything ;)

Take a peek in the schematics for ATSTK1002, in the tools section on www.atmel.com/AVR32

Hans-Christian

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Thanks hce and squidgit. Helpful info.

Mike