На первой страничке an144.pdf . Мы обратились в суппорт с просьбой дать PID, через пару дней получили. http://www.silabs.ru/pubs/an144.pdf If you do not wish to license the USB-IF logo the default Silicon Laboratories VID can be used. We recommend obtaining a unique PID for your product. To obtain a unique PID, contact Silicon Laboratories and one will be assigned to your product. Having a unique PID will reduce the chances that another device with the same VID, PID and Serial Number will appear on the same USB bus.