A circuit for a use in a control system of a peripheral device that is dedicated to tasks related to communication with a host computer via a universal serial bus (USB). The invention affords a USB dedicated circuit that is configured to allow a host computer to recognize and enumerate a device as a...http://www.google.com.tw/patents/US6389495?utm_source=gb-gplus-share專利 US6389495 - Dedicated circuit and method for enumerating and operating a peripheral device on a universal serial bus
