lab01-slides - 1 Computer Logic Logic Gates and Building...

Info iconThis preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 Computer Logic, Logic Gates, and Building Circuits Matt Huenerfauth CSE 100 Lab Session 1 September 2003 U. of Pennsylvania Image: Intel Museum 2 Logic and Computers • The technology inside of computers (and in fact all logical ideas) is based on several simple logic operations: – AND – OR – NOT • These logical operations are related to real world equivalents… 3 What does “AND” mean? • When we say “AND,” formally we mean that something is true only when both parts of it are true. • If the stove is on AND water’s in the kettle , then we will make steam. • If either part isn’t there, then the result won’t be true. 4 What does AND mean in Logic? • AND takes two inputs and produces the value TRUE if both inputs are TRUE’s. • So, with the inputs: T AND T output is: T T AND F output is: F F AND T output is: F F AND F output is: F (Just like in the real world.) 5 A Truth Table • A truth table is a convenient way to write down the definition of a logic operation. • Let’s use 1’s for True and 0’s for False… • Here’s the table for AND: input input output 1 1 1 1 1 Output of 1 only when both inputs are 1. 6 Truth Table for OR and NOT OR NOT input input output input output 1 1 1 1 1 1 1 1 1 We only need one of the inputs to be true, but if both are true, that’s ok, too. This just gives the opposite. 7 A Logic Gate • A logic gate is a small computer circuit that simulates one of the logic operators we’ve seen. • There are one or two wires that go into the gate that represent the input. • There is one output wire that represents the result of the logic operation. • When the power is on, that means True. 8 Logic Gates When drawing diagrams of logic circuits, we use some traditional shapes for each one....
View Full Document

{[ snackBarMessage ]}

Page1 / 33

lab01-slides - 1 Computer Logic Logic Gates and Building...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online