section 7 - Index of

1.1 INTRODUCTIONThe DSP56K family is Motorola's series of HCMOS, low power, 24-bit general purposeDigital Signal Processors (DSPs\ The family architecture features a modular chip layoutwith a standard central processing module which supports memory expansion options,different on-chip peripherals, and different package sizes. This modular implementationmakes it relatively straighforward for Motorola to design and generate customer specifiedderivatives.A standard interface between the central processing module's silicon and the on-chip expansionareas supports all memory and peripheral configurations. The architecture, onchipperipherals, and the low power consumption of the DSP56K family minimize the complexity,cost, and time required to add the power of Digital Signal Processing (DSP) to anydesign.This chapter introduces general DSP theory and discusses the features and benefits ofthe Motorola DSP56K family of processors. It also presents a brief description each of thesections in the manual.1.2 ORIGIN OF DIGITAL SIGNAL PROCESSINGDSP is the arithmetic processing of real-time signals sampled at regular intervals and digitized.Examples of DSP processing include the following:Filtering of signals• Convolution, which is the mixing of two signals• Correlation, which is a comparison of two signalsRectification, Amplification, and/or Transformation of a signalAll of these functions have traditionally been performed using analog circuits. Only recentlyhas semiconductor technology provided the processing power necessary to digitallyperform these and other functions using DSPs.Figure 1-1 shows a description of analog signal processing. The circuit in the illustrationfilters a signal from a sensor using an operational amplifier, and controls an actuator withthe result. Since the ideal filter is impossible to design, the engineer must design the filterfor acceptable response, considering variations in temperature, component aging, powersupplyvariation, and component accuracy. The resulting circuit typically has low noise immunity,requires adjustments, and is difficult to modify.* This manual uses the acronym DSP for Digital Signal Processing or Digital Signal Processor, dependingon the context