Question: the use of JTAG interface on Atmel ATmega2560 CPU.

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Server Contact options for registered users 's Avatar (by Gravatar) posted on
July 6, 2008, 9:12 am
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Hello all ,
I use the JTAG - ISP programmer from E-LAB, http://www.e-lab.de/pdf/ISP3_en.pdf
And the JTAG connector is connected  to the
 http://www.tigal.com/product.asp?pid13%39
MCU-ATMEGA2560 board.

I connected TMS, TCK, /RESET, TDO, VCC, TDI, and GND.

The programmer sends 5V to the board on the VCC line.

In  the programmers software I selected JTAG programming option.

But there is no way the programmer wants to communicate with the CPU ATmega2560.
The programmer can not find the ATmega2560.

Do I need to connect any other CPU signals to GND or VCC ? Or do any other trick
?

(The programmer works good with the E-lab ATmega128 boards in JTAG mode.)

A shematic of a CPU board with JTAG interface and ATmega2560 cpu can help to
find the problem.

Please help.

Thanks,
Mega lover


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Rich Webb Contact options for registered users 's Avatar (by Gravatar) posted on
July 6, 2008, 3:12 pm
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Re: Question: the use of JTAG interface on Atmel ATmega2560 CPU.



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I wonder if having an animated, puking drunk on their main page really
supports any confidence in their products?

http://www.e-lab.de/index_en.html

--
Rich Webb     Norfolk, VA

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