I need JTAG access on a board that's going to be mounted in a chassis. My original thought was just to use a RA .100 pin header, but maybe there's something like mini-DIN would be better. I'd have to make a special cable, but it would be keyed and take up less board area. Anyone have a connector they favor for JTAG use? Is there a standard I haven't heard of?
We had -more or less- the same problem when designing boards so they can be programmed in a gang programmer (also self made). I think the designer choose a smaller pitch 10 pin RA header and omit most of the JTAG grounding pins.
cheers
"Right angle".
I've been looking around and it looks like everyone has invented their own JTAG standard. The "new" Xilinx one is now a 2mm (I think) dual row to get more grounds in. Altera uses a 2x5 .100" header (times two if you use a serial EEPROM config).
I think to save "edge real estate" I'm just going to use RJ45 for the debug headers, since they will not be confused with video, and take up much less width/pin.
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