AVR JTAG is a complete set of debugging tools based on chip JTAG interface that is compatible with Atmel company's AVR Studio + iccavr and support all AVR 8-bit RISC instruction with a JTAG port of the microprocesso; The JTAG interface is a 4-wire IEEE 1149.1 standard test access port (TAP) controller. The IEEE standards provide an effective board connectivity testing standard methods (boundary scan). Atmel's AVR device has been extended to fully support the programming and on-chip debug function; Added buffer chip and resettable fuse; Supports AVR MCU w/ JTAG port; Can achieve data or programe breakpoints of single step continuous break points and variable; Can program flash EEPROM fuse and encryption; Can provide power to target board directly.