Logic and logic gates Essay

1 absorb exploitation examples how numeric and alphanumeric data fanny be coded within a computer system M1 explain using examples how data travels around the central processor D1 create complex logical system duty tours made up of arrays of simple logic circuits P2 describe how analogue data can be converted and stored in computer systems M2 create logic circuits using simple logic furnish and provide righteousness panels and explanation as to their operation D2 compargon and communication channel 2 different processors. P3 convert numeric data between different fall systems including floating point.M3 create low-level programs which involve decision reservation and branching P4 carry bug out manipulation of numeric data held in three different number systems M4 describe the difference between astable and bistable flip-flops. P5 describe the key components of a computer architecture and how they interact P6 describe the features of a processor P7 describe the operation of logic furnishs using truth tables P8 create, document and test low-level Programs BTEC National Unit 9 calculator Architecture Assignment 2 Computer Components and Features Criterion covered P7, M2, M4, D1.For these tasks you ar required to nonplus a report using drawings or diagrams and becharm technical language. Make sure you use becharm headings and subheadings to identify key tasks and requirements 1) Use logic diagrams, and truth tables and narrative to describe the operation of the pursual logic gates P7 2) Use simple logic gates (eg AND, OR, NOT) to produce a logic circuit to a) Show a security circuit which includes stimulant from a movement-sensing PIR (passive infra red sensor) and a light sensor. bit there is movement sensed, and it is dark, the security light must be lit.b) signalise the logic circuit for accessing an electrical cabinet. For safety reasons, a high electromotive force electrical maintenance cabinet can unless be accessed if the former i s off, a special key is inserted, and the high tension line is earthed. c) draw and quarter the logic circuit for a Half-Adder. Be sure to include the logic diagram, Boolean algebra statement and truth table for each and a explanation of how each works. You give similarly need to provide keys to any letter used to salute inputs and makes. M2 3) Describe the difference between astable and bistable flip-flops using appropriate diagrams.M4 4) Build complex logic circuits from arrays of simple logic circuits to a) Use Half-Adders and only logic gates to build a Full Adder b)build a logic circuit including Full Adders to add together the contents of two eight-bit registers.The formula for working out the number of possible creates is 2n. N is the number of inputs. E. g.if there ar 2 inputs than the formula would be 22. The answer is 4. This federal agency that there are 4 possible outputs. Truth Table gossip Output A. AND GATE In AND gates the output can only be 1 if all the i nputs are all 1 and if any of the output are 0 and the other input is 1 than output will always be 0. The two inputs AB and output Q represent the construction which in effect is right because the stands for AND. Truth Table remark Output ABC Z 0gate can have more than 2 inputs.The above NAND gate has 3 inputs. Therefore the formula to work out the number of output is 23 = 8. The truth table is on the side. dismantle though the formula to work out the number of outputs for the truth table is the same, the actual gate is completely opposite because if the can only be 0 if all inputs are 1. The output will always be 1 if the inputs are mix of 0 and 1. The input bearing for this gate is . The line above stands for NOT. The circle on the symbol is called a blab out and is generally used to indicate the inverted (active-low) input or output.The output can only be 1 is all the two inputs are 0 and if the output is 0 that means that the two inputs are 1 and 0 or 0 and 1. The expressio n for this gate is . This means that Q doorway also know as an Inverter, there is always 1 input. If the input is 1 than output is 0 and if the output is 1 than output has to be 0. The logical expression is which means This type of gate is implemented in computers for binary addition.If both the inputs are 0 than the output will also be 0 and if both the inputs are 1 than the output will also be 0. XOR is actually short for exclusive OR. The logical expression for the XOR gate is which means that This type of gate is simply the inverse of XOR (exclusive OR). You can only get a result of 1 is both the inputs are same either 00 or 11. If the inputs are different e. g. 0 and 1 or 1 and 0 than the output will be 0. The expression for this type of gate is. North Warwickshire & Hinckley College.