digital design and computer architecture 大纲

C1：

This chapter has introduced principles for understanding and designing

complex systems. Although the real world is analog, digital designers dis

cipline themselves to use a discrete subset of possible signals. In particu

lar, binary variables have just two states: 0 and 1, also called FALSE

and TRUE or LOW and HIGH. Logic gates compute a binary output

from one or more binary inputs. Some of the common logic gates are:

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NOT: TRUE when input is FALSE

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AND: TRUE when all inputs are TRUE

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OR:

TRUE when any inputs are TRUE

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XOR: