PCD6003

` Excellent speech quality at average: 2.6, 3.2 or5.2 kbits/s Harmony or fixed 16.0 kbits/s P2CMcompression rate
` High quality music transparent encoding with
16.0 kbits/s P2CM
` Excellent Background Noise Suppression (BNS)algorithm for speech quality improvement throughrecording with reduced background noise (available withP2CM and Harmony encoding)
` Speech compression rate selection: 2.6, 3.2 or5.2 kbits/s Harmony, 16.0 kbits/s P2CM
` Speech decompression rate selection: 2.6, 3.2 or5.2 kbits/s, 16.0 kbits/s P2CM
` Variable playback speed: 50%, 100% and 200% of realtime
` Voice prompt playback
` Philips International Language Library (PILL) supporttools 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 andprogrammable silence detection
` Recording time of minimum 20 minutes in 4-Mbit flash emory (at 3.2 kbits/s)
` Excellent true full-duplex handsfree performance rovided by Philips 'phlux' algorithm
` On-hook caller ID detection according to Bell 202 and .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 nformation tones
` Optional dial tone detection, and optional ringing etection using hardware Caller Identification (CID) nterface
` DTMF detection (for remote control function) with local cho canceller for high reliability
` Digital volume control
` Mixed digital/analog adaptive limit and/or level control of udio input signals
` Programmable analog CODEC gain for easy interfacing
` Internal 80C51 microcontroller can operate as system ontroller; with selectable operating frequencies etween 1 and 21 MHz
` Internal 80C51 microcontroller emergency operation own to 2.2 V eliminates the need for external diallers in elephone answering machine applications
` Standard 80C51 development tools allow fast design of an-Machine-Interface (MMI) features
` On-board Minimum Shift Keying (MSK) modem for T0/CT1 applications
` Two integrated differential bit stream Analog-to-Digital onverters (ADCs) for high quality audio input
` Two integrated differential bitstream Digital-to-Analog onverters (DACs) for high quality audio output
` Software selectable auxiliary CODEC input channel
` Up to 38 general purpose digital I/O lines (most of them idirectional) including I2C-bus, available for connection o keyboard, display, line interface, etc.
` On-chip 2-channel time multiplexed 8-bit general urpose ADC for e.g. parallel set detection and battery oltage measurement
` On-chip 8-bit general purpose DAC for e.g. speaker mplifier volume control
` Day and time stamp possibility using built-in Real-Time lock
` Flexible speech memory interface for connection of everal types of speech flash memory (serial, CAD or arallel) and DRAM
` I2C master/slave bus for peripheral control or I2C-bus peech memory access
` Extensive power management support for battery and mergency operation, also allowing portable (voice emo) applications
` Digital IOM A/u-law interface for Slave or Master mode peration 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

The PCD6003 integrates all the digital and analog speechmanagement and processing functions required for afeature-phone with integrated digital answering machine,or a stand-alone digital answering machine into a singlelow-cost chip.

Key hardware features of PCD6003 which give the chip distinctadvantages in performance and application overcompetitive solutions include: