Abstract:The double mode USB interface use in LED control system was introduced in this paper,this system based on the USB interface chip CH375 and LED TM1803 control chip,has low cost,simple and convenient characteristics.The LED control and SCM USB interface circuit schematics were presented,and the realization of double-mode USB and LED control software design were introduced in detail.Through the hardware debugging results show that double-mode USB communication stable performance,high reliability, fast response,and good effect of LED display.