詳細信息
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