VLSI
Solution
y
VS2000 PRELIMINARY
VS2000
VS2000 - Headtracking Multichannel
USB Audio Headphone IC / USB DAC
Hardware Features
• Low-power operation
• Single input voltage: Internal voltage regu-
lation for analog, digital, and I/O power
• Operates with a single 12 MHz clock
• Internal PLL clock multiplier
• USB Full Speed hardware
• 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 Ω load
• Lead-free RoHS-compliant package (Green)
Firmware Features
• 5.1-channel USB Audio Device
• Human Interface Device (HID) Buttons
– Volume Decrement
– Volume Increment
– Pause
– Play
– Rewind
– Fast Forward
• Volume controls also work without HID-
aware host
• Four room effect levels selected with Effect
Level Button
• Tracking On / Tracking Off / Bypass modes
selected with Power Button
• Bass and treble controls through USB Au-
dio Feature Unit
• Advanced controls through separate software
• SPI EEPROM boot for special applications
• UART for debugging and special applica-
tions
Description
VS2000 is a single-chip multichannel headtrack-
ing USB Audio IC with audio output to head-
phones. VS2000 contains a high-performance low-
power DSP core VS DSP4, Full Speed USB port,
general purpose I/O pins, SPI, UART, as well as
a high-quality variable-sample-rate stereo DAC,
and an earphone amplifier, and a common voltage
buffer.
When connected to USB, VS2000 firmware con-
trols an ultrasound transmitter and reads ultrasound
receivers to track the movement of the listener’s
head. VS2000 then performs real-time spatial pro-
cessing to the 5.1 audio channels to position each
sound source correctly depending on the head move-
ment.
An application without headtracking and just with
5.1 audio is also possible.
SPI EEPROM can be used to load code to cus-
tomize the system.
Version 0.3,
2007-09-05
1
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
