GENERAL DESCRIPTION
The PCD6003 integrates all the digital and analog speech management and processing functions required for a feature-phone with integrated digital answering machine, or a stand-alone digital answering machine into a single low-cost chip

FEATURES
• Excellent speech quality at average: 2.6, 3.2 or 5.2 kbits/s Harmony or fixed 16.0 kbits/s P2CM compression rate
• High quality music transparent encoding with 16.0 kbits/s P2CM
• Excellent Background Noise Suppression (BNS) algorithm for speech quality improvement through recording with reduced background noise (available with P2CM and Harmony encoding)
• Speech compression rate selection: 2.6, 3.2 or 5.2 kbits/s Harmony, 16.0 kbits/s P2CM
• Speech decompression rate selection: 2.6, 3.2 or 5.2 kbits/s, 16.0 kbits/s P2CM
• Variable playback speed: 50%, 100% and 200% of real time
• Voice prompt playback
• Philips International Language Library (PILL) support tools available; coding at 2.6, 3.2 or 5.2 kbits/s
• Voice operated start message recording (VOX)
• Call progress detection by busy tone detection and programmable silence detection
• Recording time of minimum 20 minutes in 4-Mbit flash memory (at 3.2 kbits/s)
• Excellent true full-duplex handsfree performance provided by Philips ‘phlux’ algorithm
• On-hook caller ID detection according to Bell 202 and V.23 standards, as well as DTMF caller ID support
• Caller Alerting Signal (CAS) - caller ID level 2
• Dual tone generation for DTMF, melody tones and information tones
• Optional dial tone detection, and optional ringing detection using hardware Caller Identification (CID) interface
• DTMF detection (for remote control function) with local echo canceller for high reliability
• Digital volume control
• Mixed digital/analog adaptive limit and/or level control of audio input signals
• Programmable analog CODEC gain for easy interfacing
• Internal 80C51 microcontroller can operate as system controller; with selectable operating frequencies between 1 and 21 MHz
• Internal 80C51 microcontroller emergency operation down to 2.2 V eliminates the need for external diallers in telephone answering machine applications