No, it uses the chip's SPI ports for programming. Take a look at, for example, the data sheet on the ATmega64 that supports both JTAG and SPI programming.
Having a few JTAG dongles sitting around here (TI MSP430, Cypress something (clear blue plastic box), a Xilinx Parallel 3, and an Altera ByteBlasterMV clone (dang, these things do accumulate)) does anyone know if the Atmel JTAG software can be fooled into using one of the others?
-- Rich Webb Norfolk, VA
Rich Webb banged on the keyboard until producing news: snipped-for-privacy@4ax.com:
JTAG is _supposed_ to be JTAG. Compare the pinouts of the various devices you have, and that should answer your question.
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On the JTAG side, you are correct of course. However, different parallel port pins and logic can be used to drive/receive the JTAG signals.
-- Rich Webb Norfolk, VA
Rich Webb banged on the keyboard until producing news: snipped-for-privacy@4ax.com:
That's what I'm saying: take a look at the outputs of the various dongles and see if any match up.
-- * * * * * * * * * * * * * * * * * Dorsai - Author of Erotic Fiction http://www.asstr.org/~Dorsai * * * * * * * * * * * * * * * * * "Economics is extremely useful as a form of employment for economists." -- John Kenneth Galbraith
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