Abstract
With the development of digital codecs and compression technology, voice paper towards a high compression ratio, high-fidelity direction, from MP1 and MP2 to the MP3 format currently.
This subject describes the single-chip music player system is based on the MP3 format. Contrast of basing on the existing ARM, DSP chips and special decoder of several programs, and finally chose the specialized decoder chip of AT89C51SND1 design Program. According to the special decoder chip, designed power circuit consist of by chip SP6641 and SP6231, Responsible for the 5th two battery voltage of 3V up to 3.3V. And USB 5V voltage decline to 3.3V relief. K9F1208 is used to the flash memory chip as storage device for audio storage. Recording circuit is consist of resistance, capacitance, amplifier and Separation of components, etc. and it will achieve no recording automatically turn off functions. Audio circuit is consist of chip CS4330, resistance, capacitance, headphone jack and other components of separation circuit.
Key words: MP3 Players, decoder chip, K9F1208
