USB Audio Controller

W681308 is USB2.0 full speed compatible and integrates a fast 8051 MCU that enables feature rich applications. The part also has a 8/16/48-kHz sampling rate wideband Codec with a 16-bit ADC/DAC and Acoustic Echo cancellation (AEC) and AGC to support USB speaker phone applications. This single-chip solution also supports full-duplex echo cancellation, 3-channel PCM mixer, integrated microphone amplifier and speaker driver, flexible OTP custom programming and complete reference design solutions. The high integration of the W681308 enables lower cost and smaller board space design.

The W681308 is designed for PC-based VoIP applications targeting USB wired/wireless handset, USB speaker phone, PSTN/USB dual mode phone, USB PSTN gateway and USB Analog Telephone Adapters (ATAs).

The W681308 includes an integrated 3-channel PCM mixer for conference applications, an SPI interface for external serial flash and LCD module support.  For building USB Gateway and USB ATA solutions, you can combine the W681308 with Nuvoton's Voice CODEC or Pro-X ICs.

For additional information about our new W681308 - USB Audio Controller, please Contact Sales

Block Diagram

Application Diagram – USB speaker phone handset

Application Diagram – USB Wireless base station with speaker phone

• 8 Bit Turbo MCU
  • Embedded 12/24/48MHz Turbo 8051 MCU with 4 Clocks per Machine Cycle
  • 1KB system RAM, 8KB OTP ROM with read protection mode.
  • In Circuit Emulation (ICE) through JTAG Interface
    
• High Quality 16 bit Audio Linear CODEC
  • Built-in 8K/16K/48KHz sampling rate wide-band Audio CODEC and true 16 bits resolution ADC/DAC with internal 24 bit audio data processing for both record and playback
  • On-chip Microphone amplifier and speaker driver with programmable gain stage.
• USB 2.0 Full speed Interface and HID support
  • Support 5 end points configuration: Control Out, ISO IN/OUT, Bulk IN, Bulk OUT and Interrupt IN.
  • 512 Bytes RAM-base Descriptor to customize HID command support through 8051
• Integrated echo cancellation
  • Support both half-duplex AEC and 32ms full duplex AEC
  • Build-in digital AGC for speaker phone application.
• Integrated keypad control pins and GPIOs
  • Volume up and down
  • Dial / hang up
  • Microphone and speaker phone mute.
  • LED indicators
  • Number pad control
  • User programmable keys
  • Keypad scanning
  • LCD Module interface control
• UART
  • UART port for serial data application and debugging
• PCM Interface
  • 3 channels PCM mixer
  • Master Linear PCM interface to connect Nuvoton ProX CODEC/SLIC for ATA or PSTN gateway applications
• SPI interface
  • Works in master modes to control LCD/LCM or other SPI slave devices
  • SPI serial Flash interface and W2S 2 Wire interface.
• 5V USB voltage supply
  • 3.3V linear regulator using external transistors.
• Package
  • 48 pin LQFP package 7mmx7mmx1mm