Hardware Features
* Low-power operation
* Single input voltage: Internal voltage regulation for analog, digital, and I/O power
* Operates with a single 12 MHz clock
* Internal PLL clock multiplier
* Power button pin, software-controlled power-off
* USB Full Speed hardware
* NAND FLASH interface with ECC
* I/O for user interface
* High-quality on-chip stereo DAC with no phase error between channels
* Stereo earphone driver capable of driving a 30­ load
* Lead-free RoHS-compliant package (Green)

Firmware Features
* Implements USB Mass Storage Device and Audio Device
* NAND FLASH handling with error correction, block remapping, and wear levelling
* Default player application in firmware
– Decodes Ogg Vorbis, sound level normalization using Replay Gain
– Pause / Play
– Volume control
– Next / Previous Song
– Rewind and Fast Forward
– Random Play
– EarSpeaker Spatial Processing
* Bass and treble controls for customized player
* NAND FLASH boot for customized player
* SPI FLASH boot for special applications
* UART for debugging and special applications

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.
When connected to USB, the firmware implements USB Mass Storage Device protocol or acts as an Audio Device, providing a single-chip USB headphone application.
EarSpeaker spatial processing provides more natural sound in headphone listening conditions. It widens the stereo image and positions the sound sources outside the listener’s head.
SPI EEPROM can be used to load code in applications that do not use NAND FLASH.

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