As a new interface caters for rapid development of computer peripheral equipment , universal serial bus ( for short usb ) dispels astriction of communication through traditional serial port and parallel port . it is very suitable for real time image data transmission , which requires high speed . this theme describes two - circuit systems , which utilize usb interface to data from a digital image sensor to pc 为了迎合计算机上设的快速发展以及消除计算机外设通过串、并口的通讯的局限性,出现了新的计算机外设接口usb (通用串行总线) ,这种新型接口对于实时的视频传输很适用,本文设计了两套电脑眼基于ez - usb2131q的usb接口系统。