J-LINK REDUCES JTAG DEBUG PINCOUNT FROM 5 to 1! Pittsford, New York—Traditional JTAG boundary-scan testing normally takes up 5 valuable pins on an i.c., requires 5 resistors, and increases chip power.

This debugger was implemented and designed for the ATmega644 which utilizes its JTAG interface for communication as it sets breakpoints and access registers and memory in order to control program ...

If not, it might be because you haven’t mastered the basics of JTAG and learned how to dump, or snarf, the firmware of an embedded device. This JTAG primer will get you up to snuff on snarfing, and ...