Hello Saim, First of all read http://www.ethernut.de/pdf/enswm24e.pdf I recently updated http://www.ethernut.de/en/iccavr/ Harald At 17:59 22.12.2005 +0100, you wrote: >I am going to start the project with Ethenut2.1 and i have installed , >Nut/OS, ICCAVR 6.1, and AVR Studio at windows environment. With JTAG >programmable interface.