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PCD6003

Digital telephone answering machine chip

Philips Electronics 

Philips Semiconductors

Digital telephone answering machine chip

Product specification

PCD6003

1 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

• Standard 80C51 development tools allow fast design of

Man-Machine-Interface (MMI) features

• On-board Minimum Shift Keying (MSK) modem for

CT0/CT1 applications

• Two integrated differential bit stream Analog-to-Digital

Converters (ADCs) for high quality audio input

• Two integrated differential bitstream Digital-to-Analog

Converters (DACs) for high quality audio output

• Software selectable auxiliary CODEC input channel

• Up to 38 general purpose digital I/O lines (most of them

bidirectional) including I2C-bus, available for connection

to keyboard, display, line interface, etc.

• On-chip 2-channel time multiplexed 8-bit general

purpose ADC for e.g. parallel set detection and battery

voltage measurement

• On-chip 8-bit general purpose DAC for e.g. speaker

amplifier volume control

• Day and time stamp possibility using built-in Real-Time

Clock

• Flexible speech memory interface for connection of

several types of speech flash memory (serial, CAD or

parallel) and DRAM

• I2C master/slave bus for peripheral control or I2C-bus

speech memory access

• Extensive power management support for battery and

emergency operation, also allowing portable (voice

memo) applications

• Digital IOM A/u-law interface for Slave or Master mode

operation at various bit rates

• Emergency operation from telephone line power only;

microprocessor and DTMF generator continue to

operate in this mode

• On-chip software switchable supply voltage for electret

microphone

• Single low supply voltage (2.2 to 2.8 V)

• Built-in single low-frequency, low-power, crystal or

ceramic resonator oscillator and on-chip PLL to reduce

EMI

• Stand-alone operation with low cost PAL, NTSC and

DTMF crystals

2001 Apr 17

3

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