VS1000 is a single-chip Ogg Vorbis (license-free audio codec) player. VS1000 contains a high-performance low-power DSP core VS DSP4, NAND FLASH interface, Full Speed USB port, general purpose I/O pins, SPI, UART, as well as a highquality variable-sample-rate stereo DAC, and an earphone amplifier and a common voltage buffer. VS1000 firmware implements a default player that reads and plays files from the NAND FLASH. The player can be customized or replaced by using boot from NAND FLASH.