need avr compiler and simulator
page 22 example is here in complete project form and the tutorial provided by Gurpreet312 is very useful read that
thanks majoka and gurpreet... now i am comfortable with avr compiler and controller.. in at90usb646 thet mention host negotiation protocol and session request protocol protocol... wat s the meaning ? wre it is used? is this ic can used for usb mass storage device? please answer for me........
try to search in Google and u have need to read all data sheets one becoz at initial stage it will be difficult to jump to usb
read some info on this chip
USB in a Nutshell - Making sense of the USB standard
USB in a Nutshell is a six part article detailing the Universal Serial Bus. It currently provides details on the connectors, electrical, suspend currents, speed identification, USB packet types, endpoints, pipes, endpoint/transfer types including Control, Interrupt, Isochronous and Bulk Transfers, USB descriptors including Device, Configuration, Interface, Endpoint and String descriptors, the USB Setup Packet and Standard Device, Standard Interface and Standard Endpoint Requests.