AT2008

AT2008 8 Channels ADPCM Processor Atelic Systems, Inc. AT2008 Application Note Preliminary 8 Channels ADPCM Processor Version 1.0 January 29, 2001 Description www.DataSheet4U.com The AT2008 is an eight full-duplex channels ADPCM processor. It follows the G.726 ITU Standard for ADPCM compression for 40k, 32k, 24k and 16k bit rates with selectable µ-law and A-law input/output. This chip can operate on 16 channels of PCM to ADPCM compression, 16 channels of ADPCM to PCM decompression, 8 channels of full-duplex operation in an 8KHz frame basis, or any combination of M-channels of compression plus N-channels of decompression when M+N <= 16. Using the 3-wire command serial port, each individual half-channel can be dynamically configured to perform the ADPCM algorithm at different bit rates, idle or reset of the algorithm. It can also be programmed to set up different input/output time slots, or to select, (1) bypass without compression, (2) idle, or (3) reset of the algorithm. Features 8 full channels of ITU G.726 ADPCM ADPCM coding and decoding with bypass mode Per channel selectable µ-Law and A-law input/output Up to 8 synchronous signals for direct interface with popular combo/codec. On-chip time slot assignment Available internal clock generator and frame sync. generator Simple 3-wire serial command port for chip configuration On-chip power-up/power down/reset The two clock pins (CLKA and CLKP) used as PCM/ADPCM data clocks, and the FSY pin used for Frame S...