Overview
Combined with an analog front end the provides a solution for embedded or stand alone answering machine applications. Together with a standard microcontroller for analog telephones these two chips form the core of a featurephone with full duplex speakerphone and answering machine capabilities.

FEATUREs
Digital Functions
• High performance recording by DigiTape™
• Selectable compression rate (3.3, 5.6 or 10.3 kbit/s)
• Variable playback speed
• Support for DRAM/ARAM or Flash Memory (5V, 3.3V)
• x1, x4 and x8 ARAM/DRAM supported
• Optional voice prompt EPROM
• Up to four serial or parallel flash devices supported (Atmel, Toshiba, Samsung)
• Audio data transfer via serial control interface (SCI) possible
• Full duplex speakerphone by acoustic echo cancellation
• DTMF generation and detection
• Call progress tone detection
• Caller ID decoder
• Caller ID sender
• Direct memory access
• Real time clock
• Equalizer for transducer/microphone frequency response correction
• Automatic gain control
• Automatic timestamp
• Universal tone detector
• Three data channels (IOM®-2 compatible interface)
• Auxiliary parallel port with optional interrupt generation
• Ultra low power refresh mode
• Emergency shut-down (fast parameter saving into flash device)
• Backward compatible with PSB 4860 V2.1 (hardware and software)