W681307 USB Audio Controller

The W681307 is USB controller with 8051 MCU for the VoIP market with on chip echo cancellation feature, integrating a 16 bit ADC/DAC and digital AEC/AGC to support USB speaker phone applications in a single chip packages. That result in reduced board space and low Bill of Materials (BOM) costs in the industry for PC-based VoIP applications.

The W681307 is designed for PC-based VoIP applications targeting USB phone, PSTN/USB dual mode phone, USB PSTN gateway and USB Analog Telephone Adapters (ATAs).

The W681307 includes an integrated 4-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 W681307 with Nuvoton’s Voice CODEC or Pro-X ICs.

For additional information about our new W681307 - USB Audio Controller, please Contact Sales
 
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Block Diagram
Key Features
  • Micro controller
    • Embedded 27.648MHz WINBOND Turbo 8051 Micro-Controller with 4 Clocks per Machine Cycle
    • 4K system RAM, 32K MASK ROM
    • Core 1.9V, I/O 3.3V
    • Power on Reset circuit
    • Software Power Down mode
    • In system Programming (ISP) for 29/39/49 series flash ROM
    • Built-in Keypad Scan, Watchdog, Wait State
  • Speech Processor/Interface
    • 4 Processor Channels
    • Programmable input/output gain stage
    • Programmable Auto Gain Control (AGC) stage
    • Programmable Soft Clip gain stage
    • Acoustic Echo Cancellation (AEC) with half duplex, absolute/relative mode
    • PCM interface for External CODEC or PCM devices
    • SNDR output
    • Built in DTMF tone generator
  • PCM CODEC
    • One Built-in PCM CODEC with 8Khz sampling rate and 16bit ADC/DAC.
    • Analog input amplifier with Internal programmable gain stage
    • Analog output amplifier: Push pull drive, Internal programmable gain stage
  • USB 2.0 FS
    • Universal Serial Bus USB 2.0 FS compliant device controller and PHY, capable of full speed communication (12MHz) with up to 5 configuration end –points.
  • UART
    • T8051 UART for serial data application.
  • PCM Highway
    • The 1st PCM Highway has four channels.
      All channels support 8/16 bits PCM format, and IOM2 mode.
      Works in master or slave modes with external CODEC.
  • W2S
    • Support three EEPROM format page modes.
    • Support six kinds of W2S bus clocks.
  • SPI interface
    • Works in master or slave modes.
  • SPI Flash interface
    • Works in master with the Nuvoton SPI interface of serial flash.
  • ISP
    • In-system-Programming capability with software command via UART or USB interface.
  • Package
    • 100 pin LQFP package
Benefits
Applications
  • Provide PC VoIP users with easy to use regular phone experience and speaker phone.
  • Supports standard 8051 Keil C development system for rapid deployment to market
  • 8051MCU with 32KB mask ROM for feature rich USB VoIP applications
  • Nuvoton total solution and support enable quick customer design to mass production.
  • USB LCD phone
  • USB desk speaker phone
  • Dual mode phone

Application Diagram

Application Diagram – USB Speaker Phone


Application Diagram – USB ATA

Product Selection Guide
Part Number
Description
Package
W681307
8051 MCU with 32KB Mask ROM, USB 2.0 FS, 16-bit CODEC,  Echo Cancellation. SPI, PCM, 4-channel PCM mixer
LQFP-100