To guarantee the fluency of audio data

a new type of interface chip CH378 is used in the design of the music player system. The system consists of a microprocessor （MPU） STC12C5A60S2

audio files memory USB

SD/TF card

audio decoding chip VSIO03 and other components. On the basis of the analysis of U-interface chip

direct management of USB

SD/TF card is implemented by using a novel interface chip CH378. The inter- face circuit for CH378 is designed

and the main processes of CH378 operations and the essential of program design are introduced. CH378 has many advantages such as a large data buffer RAM

with parallel interface to MPU

sup- ports FAT file system operations. The system structure is optimized structure design

and the operation is simplified by using CH378. The phenomenon of audio stream clogging in music playing is eliminated

and music playing is smooth.