pardon my ignorance but I'm developing some projects with USB interfaces. And I was wondering why everyone seems to be using the FTDI products when the AT90USB and ATMEGAxxU4 controllers have USB built in.
It seeems that several people have also complained about the added cost of the FTDI's.
This even gets down to the suppliers (dk and mouser) having virtually no stock of the AVR USB devices.
Is it that they are fairly new and don't have momentum yet? Or is there some technical reason that in my ignorance I don't understand?