VS1000 - Ogg Vorbis Player System Circuit

 

Introduction

The VS1000 is a system-on-a-chip. Instead of being yet another "MP3 decoder circuit" the VS1000 plays back Ogg Vorbis, which is both a technically superior format and free of royalty payments. Because of this the VS1000 IC is a cost-effective and high-quality solution for applications where the actual audio format doesn't make a difference, but quality does - like toys and different audio guides. The chip also has NAND FLASH and Full Speed USB interfaces, plus I/O pins that can be used to control e.g. an LCD or OLED matrix display. It can also regulate its internal voltages from a single input voltage, so connecting it to a system is easy.

Hardware Features

• Complete player, just memory and crystal needed externally.
• Low-power operation
• Single input voltage: Internal voltage regulation for analog, digital, and I/O power
• Operates from single 12 MHz clock
• Internal PLL clock multiplier
• Power button pin,
• Software-controlled power-off
• USB 2.0 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 ohm load

Firmware Features

• Uses Ogg Vorbis decoder. Its has high quality vs. bit-rate and is free of royalty payments
• Implements USB Mass Storage Device and Audio Device
• NAND FLASH handling with error correction, block remapping, and wear leveling
• 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