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Lecture 9: Digital Signal Processors: Applications and ...

1 Kurt KeutzerLecture 9: Digital Signal Processors: Applications and ArchitecturesPrepared by: Professor Kurt KeutzerComputer Science 252, Spring 2000 With contributions from:Dr. Jeff Bier, BDTI; Dr. Brock Barton, TI; Prof. Bob Brodersen, Prof. David Patterson 2 Kurt KeutzerProcessor ApplicationsGeneral Purpose - high performance Pentiums, Alpha s, SPARC Used for general purpose software Heavy weight OS - UNIX, NT Workstations, PC sEmbedded processors and processor cores ARM, 486SX, Hitachi SH7000, NEC V800 Single program Lightweight, often realtime OS DSP support Cellular phones, consumer electronics ( CD players) Microcontrollers Extremely cost sensitive Small word size - 8 bit common Highest volume processors by far Automobiles, toasters, thermostats.

The Piranha has 3 sized instructions - basic 2 byte, and 2 byte plus 16 or 32 bit immediate. 20 ... The “MIPS/MFLOPS” of DSPs is speed of Multiply-Accumulate (MAC). ... Floating Point DSPs cost 2X - 4X vs. fixed point, slower than fixed point

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bwrcs.eecs.berkeley.edu

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chapter2.fm Page 33 Monday, September 4, 2000 …

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