GENERAL DESCRIPTION

The PCD6001 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 compression rate

• Excellent background noise suppression for speech quality improvement

• Speech compression rate selection: 2.6, 3.2 or 5.2 kbits/s

• Speech decompression rate selection: 2.6, 3.2 or 5.2 kbits/s

• 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

• Standard 80C51 development tools allow fast design of Man-Machine-Interface (MMI) features

• On-board Minimum Shift Keying (MSK) modem for CT0/CT1 applications