《小学生思维能力表现标准与分析研 ..57.pptVIP

EECS 150 Fa04 Lecture 2 EECS 150 - Components and Design Techniques for Digital Systems Lec 02 – CMOS Technology9-2-04  David Culler Electrical Engineering and Computer Sciences University of California, Berkeley /~culler /~cs150 Outline Summary of last time Overview of Physical Implementations CMOS devices Announcements/Break CMOS transistor circuits basic logic gates tri-state buffers flip-flops flip-flop timing basics example use circuits We will learn in CS 150 … Language of logic design Logic optimization, state, timing, CAD tools Concept of state in digital systems Analogous to variables and program counters in software systems Hardware system building Datapath + control = digital systems Hardware system design methodology Hardware description languages: Verilog Tools to simulate design behavior: output = function (inputs) Logic compilers synthesize hardware blocks of our designs Mapping onto programmable hardware (code generation) Contrast with software design Both map specifications to physical devices Both must be flawless…the price we pay for using discrete math What is logic design? What is design? Given problem spec, solve it with available components While meeting criteria for size, cost, power, beauty, elegance, etc. What is logic design? Choose digital logic components to perform specified control, data manipulation, or communication function and their interconnection Which logic components to choose?Many implementation technologies (fixed-function components, programmable devices, individual transistors on a chip, etc.) Design optimized/transformed to meet design constraints What is digital hardware? Devices that sense/control wires carrying digital values (physical quantity interpreted as “0” or “1”) Digital logic: voltage 0.8v is “0”, 2.0v is “1” Pair of wires where “0”/“1” distinguished by which has higher voltage (differential) Magnetic orientation signifies “0” or “1” Primitive digital hardware devices Logic computation devices (sen