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Digital Audio DSP
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The DSP56009 is a high performance, programmable Digital Signal Processor (DSP) suitable for a variety of digital audio decompression functions, such as Dolby Digital Surround, MPEG®1 Layer 2, and Digital Theater Systems (DTS), which require the large memory provided by this DSP. The DSP56009 is an MPU-style general purpose DSP, composed of the same, efficient, 24-bit Digital Signal Processor core used by other members of the Motorola 56000 family DSPs, large program and data memories required by advanced signal processing algorithms, various peripherals optimized for audio, and support circuitry. The memory and peripherals differentiate this DSP from the other family members. The block diagram shows the DSP core, which is fed by a large Program ROM, two independent data RAMs, two data ROMs, a Serial Audio Interface, Serial Host Interface, External Memory Interface, dedicated I/O lines, on-chip Phase Lock Loop (PLL), and On-Chip Emulation (OnCE) port.
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