Block Diagram

• Micro controller
  • Embedded 27.648MHz WINBOND 8051 Micro-Controller with 4 Clocks per Machine
  • Cycle
  • 10K system RAM, 64K 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
  • Electrical Echo Cancellation (EEC) with full/half duplex, absolute/relative mode
  • PCM interface for Telephone Answering Machine (TAD) Chips
  • PCM interface for External CODEC or PCM device.
  • 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
• Caller Identification
• Compliant with Bell core TR-NWT-000030 & SR-TSV-002476, British Telecom SIN 227 & SIN
• 242, and U.K. Cable Communications Association (CCA) specifications
• BELLCORE CPE Alerting Signal (CAS) and BT idle State and Loop State Tone Alerting Signal detection use dual tone alerting signal detector
• BELL 202 and CCITT V.23 FSK wave generator with 1200 baud rate
• CAS, FSK, DTMF detection and programmable threshold value for CAS, FSK and DTMF
• Calling line identifier type 1 and type 2
• Speech energy detection
• Call Progress Tone detection
• Compatible with Russian CID.

• 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.
• FIFO UART
  • 40 bytes receiving FIFO.
• SIM Card Reader
  • Complying with ISO-7816 and GSM-11.11
• 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

• Provide PC VoIP users with easy to use regular phone experience
• Supports standard 8051 Keil C development system for rapid deployment to market
• Integrates USB and PSTN/Caller ID interface to enable dual mode USB VoIP applications
• 8051MCU with 64KB mask ROM for feature rich USB VoIP applications
• Nuvoton total solution and support enable quick customer design to mass production

• USB PSTN dual mode desk phone
• USB PSTN wired/wireless Gateway