AVRISP

Oct 08, 2004 23 Replies
R

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
Vote
Twitter Facebook LinkedIn
D

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.

* * * * * * * * * * * * * * * * * Dorsai - Author of Erotic Fiction http://www.asstr.org/~Dorsai * * * * * * * * * * * * * * * * * Giving power and money to Government is like giving whiskey and car keys to teenage boys - P.J. O'Rourke
Vote
Twitter Facebook LinkedIn
R

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
Vote
Twitter Facebook LinkedIn
D

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
Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required