数字设计原理与实践七.

数字设计原理与实践(七).DO NOT COPY7c h a p t e rDO NOT COPYSequentialLogic Design PrinciplesDO NOT ogic circuits are classified into two types,“combinational”and L“sequential.”A combinational logic circuit is one whose outputs depend only on its current inputs.The rotary channel selector knob on an old-fashioned TV is like a combinational circuit―its COPY“output”selects a channel based only on its current“input”―the position of the knob.A sequential logic circuit is one whose outputs depend not only on its current