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About Digital Signal Processors (DSP)
Digital signal processors (DSP) are special microprocessors designed for digital signal processing, usually in real-time. DSPs can also be used to perform general-purpose computations; however, they are not optimized for this function. Instead, DSPs use an instruction set architecture (ISA) that is optimized for rapid signal processing. Important ISA features include deep pipelining to enhance microprocessor performance and the ability to act as a direct memory access device (DMA) for the host environment. Digital signal processors also use Harvard architecture with separate program and data memory. In addition, DSPs use saturation arithmetic so that overflow operations accumulate at the maximum or minimum values that the register can hold instead of wrapping around. With DSPs, the maximum remains the maximum. By contrast, with many general-purpose CPUs, the sum of the maximum plus one equals the minimum.
Most digital signal processors are fixed-point devices because in real-world signal processing, extra precision is not required and there is a large speed benefit. Floating-point DSPs are common in scientific and other applications that require precision. Digital signal processors feature specialized instructions, modulo-addressing in ring buffers, and bit-reversed addressing mode for Fortran function tree (FFT) cross-referencing. Generally, DSPs are dedicated integrated circuits (ICs); however, DSP functionality can also be realized using field programmable gate array (FPGA) chips. DSPs are used in several classes of computer hardware, including sound cards, modems, telephony boards that handle sound and modem functions, and hardware that handles audio and video compression in real time.
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Engineering Web: Digital Signal Processors DSP
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The Scientist and Engineer's Guide to Digital Signal... The Scientist and Engineer's Guide to Digital Signal Processing By Steven W. Smith, Ph.D. |
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Digital Signal Processing... Find digital signal processors (DSP), ARM9 and Cortex-A8 applications processors, DaVinci? technology based digital media processors, OMAP? |
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Analog Devices, Inc. | Converters Amplifiers Processors... Digital to Analog Converters Embedded Processing and DSP world leader in high performance signal processing See Analog Devices, Inc. Information |
Part Numbers for Digital Signal Processors DSP
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| DSP56321VL240 | Future Electronics | FREESCALE SEMICONDUCTOR | Not Provided | DSP56321VL Series 24-Bit 240 Mhz Digital Signal Processor - MAPBGA-196 |
| DSP56303AG100 | Future Electronics | FREESCALE SEMICONDUCTOR | Not Provided | Not Recommended for New Design - 24-Bit 100Mhz Digital Signal Processor-LQFP-144 |
| DSP56301AG100 | Future Electronics | FREESCALE SEMICONDUCTOR | Not Provided | DSP56301AG Series 24-Bit 100 Mhz Digital Signal Processor - LQFP-208 |
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