Chapter 1: Boolean Logic
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1 Elements of Computing Systems, Nisn & Schocken, MIT Press, Chpter 1: Boolen Logic Usge nd Copyright Notice: Copyright 2005 Nom Nisn nd Shimon Schocken This presenttion contins lecture mterils tht ccompny the textook The Elements of Computing Systems y Nom Nisn & Shimon Schocken, MIT Press, The ook we site, fetures 13 such presenttions, one for ech ook chpter. Ech presenttion is designed to support 3 hours of clssroom or self-study instruction. You re welcome to use or edit this presenttion for instructionl nd non-commercil purposes. If you use our mterils, we will pprecite it if you will include in them reference to the ook s we site. And, if you hve ny comments, you cn rech us t tecs.t@gmil.com Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 1
2 Boolen lger Some elementry Boolen opertors: Not(x) And(x,y) Or(x,y) Nnd(x,y) Boolen functions: x y z f ( x, y, z) = ( x + y) z x Not(x) Not(x) x y Or(x,y) Or(x,y) x y And(x,y) And(x,y) x y Nnd(x,x) Nnd(x,x) Functionl expression VS truth tle expression Importnt result: Every Boolen function cn e expressed using And, Or, Not. Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 2
3 All Boolen functions of 2 vriles Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 3
4 Boolen lger Given: Nnd(,), flse Not() = Nnd(,) true = Not(flse) And(,) = Not(Nnd(,)) George Boole, ( A Clculus of Logic ) Or(,) = Not(And(Not(),Not())) Xor(,) = Or(And(,Not()),And(Not(),))) Etc. Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 4
5 Gte logic Gte logic gte rchitecture designed to implement Boolen function Elementry gtes: Composite gtes: Interfce VS implementtion. Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 5
6 Gte Logic Interfce Xor Clude Shnnon, Implementtion Not And ( Symolic Anlysis of Rely nd Switching Circuits ) Or Not And Xor(,) = Or(And(,Not()),And(Not(),))) Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 6
7 Circuit implementtions AND gte OR gte power supply power supply c c AND (,,c) c AND AND From computer science perspective, physicl reliztions of logic gtes re irrelevnt. Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 7
8 Project 1: elementry logic gtes Given: Nnd(,), flse Build: Nnd(,) Nnd(,) Not() =... true =... And(,) =... Or(,) =... Mux(,,sel) =... Etc gtes ltogether. Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 8
9 Multiplexer sel sel Mux sel 0 1 Implementtion: sed on Not, And, Or gtes. Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 9
10 Exmple: Building n And gte And And.cmp Contrct: When running your.hdl on our.tst, your. should e the sme s our.cmp. And.hdl And.tst CHIP CHIP And And { IN IN,, ; ; OUT OUT ; ; // // implementtion missing missing } lod lod And.hdl, And.hdl, put-file And., And., compre-to And.cmp, And.cmp, put-list ; ; set set 0,set 0,set 0,evl,put; set set 0,set 0,set 1,evl,put; set set 1,set 1,set 0,evl,put; set set 1, 1, set set 1, 1, evl, evl, put; put; Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 10
11 Building n And gte Interfce: And(,) = 1 exctly when ==1 And And.hdl CHIP CHIP And And { IN IN,, ; ; OUT OUT ; ; // // implementtion missing missing } Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 11
12 Building n And gte Implementtion: And(,) = Not(Nnd(,)) And.hdl CHIP CHIP And And { IN IN,, ; ; OUT OUT ; ; // // implementtion missing missing } Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 12
13 Building n And gte Implementtion: And(,) = Not(Nnd(,)) Nnd x in Not And.hdl CHIP CHIP And And { IN IN,, ; ; OUT OUT ; ; // // implementtion missing missing } Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 13
14 Building n And gte Implementtion: And(,) = Not(Nnd(,)) NAND x in NOT And.hdl CHIP CHIP And And { IN IN,, ; ; OUT OUT ; ; Nnd( Nnd( =,, =,, = x); x); Not(in Not(in = x, x, = ) ) } Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 14
15 Hrdwre simultor HDL progrm test script gte digrm And And Or Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 15
16 Hrdwre simultor HDL progrm Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 16
17 Hrdwre simultor HDL progrm put file Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 17
18 Project 1 tips Red Chpter 1 of the ook Explore the ook s we site ( Downlod the ook s softwre suite Go through the hrdwre simultor You re in usiness. Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 18
19 End note: Progrmmle Logic Device for 3-wy functions c nd legend: ctive fuse lown fuse 8 nd terms connected to the sme 3 inputs. or f(,,c) nd single or term connected to the puts of 8 nd terms _ PLD implementtion of f(,,c)= c + c (the on/off sttes of the fuses determine which gtes prticipte in the computtion) Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 19
20 Perspective Ech Boolen function hs cnonicl representtion The cnonicl representtion is expressed in terms of And, Not, Or And, Not, Or cn e expressed in terms of Nnd lone Ergo, every Boolen function cn e relized y stndrd PLD consisting of Nnd gtes only Mss production c nd Universl uilding locks, unique topology. or f(,,c) Gtes, neurons, toms, nd Elements of Computing Systems, Nisn & Schocken, MIT Press, 2005, Chpter 1: Boolen Logic slide 20
Elements of Computing Systems, Nisan & Schocken, MIT Press. Boolean Logic
Elements of Computing Systems, Nisn & Schocken, MIT Press www.idc.c.il/tecs Usge nd Copyright Notice: Boolen Logic Copyright 2005 Nom Nisn nd Shimon Schocken This presenttion contins lecture mterils tht
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