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