By Phil Lapsley, Jeff Bier, Amit Shoham, Edward A. Lee
This state of the art, functional consultant brings you an self reliant, accomplished creation to DSP processor know-how. a radical educational and assessment of DSP architectures, this booklet contains a huge variety of todays product choices in examples that illustrate DSP beneficial properties and functions. This ebook is principally important to digital structures designers, processor architects, engineering managers, and product planners.From the again CoverElectrical Engineering/Signal Processing DSP Processor basics Architectures and contours A quantity within the IEEE Press sequence on sign Processing Jerry D. Gilbson, sequence Editor because the emergence of the 1st commercially winning electronic sign processors within the early Eighties, the programmable DSP marketplace has burgeoned. Designers can now choose between an enormous array of specialised processors with robust signal-processing services. DSP Processor basics provides an self sustaining, entire creation to DSP processor expertise. an intensive educational and evaluation of DSP architectures, this publication features a large variety of today’s product choices in examples that illustrate DSP positive factors and services. This booklet is principally beneficial to digital structures designers, processor architects, engineering managers, and product planners. themes coated include:•Numeric formats•Data paths•Memory structures•Instruction sets•Execution control•Pipelining•On-chip peripherals•On-chip debugging facilities•Clocking options•And more!sharingmatrix.com
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Extra resources for DSP Processor Fundamentals: Architectures and Features
43 DSP Processor Fundamentals: Architectures 32 40 Operand Registers - - - .. '---_ _ Accumulators and Features -y---J - FIGURE 4-6. A typical floating-point DSP processor data path (from the AT&T DSP321 0). 44 Chapter 4 Data Path TABLE 4-1. , l/x). The estimate can be used as the starting point, or seed, for an iterative algorithm that computes the precise value of the reciprocal. ADSP-210xx DSP96002 DSP32xx Square root reciprocalseed Provides an estimate of the reciprocal of the square root of a value.
Most floating-point DSP processors record the occurrence of overflow by setting a status flag and automatically saturating the result of the operation that caused the overflow (setting it to the largest positive or largest negative output value representable). 45 DSP Processor Fundamentals: Architectures and Features Another exception condition tracked by floating-point processors is underflow. Underflow occurs when the result of an arithmetic operation is too small to be represented. This can happen, for example, when multiplying two tiny numbers together.
This allows the programmer to directly select the most-significant (for fractional multiplication) or least-significant (for integer multiplication) halves of the multiplier or accumulator output values to pass to the next step of computation. Another common feature is the inclusion of an automatic left shift by one bit following the multiplier. In cases where the bit-width optimization discussed above is used for fractional multiplication, this leftshift operation aligns the multiplier output so that the desired subset of the full-width result fits completely within the upper half of the result register.