PCD6001

` 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
` 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
` API providing flash memory management functions such as speech, telephone or CID data storage
` Pin and software compatible with the PCD6002 OTP-device (see Application note for restrictions).

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.

Key hardware features of PCD6001 which give the chip distinct advantages in performance and application over competitive solutions include.