lecture12 - CMPT 150 Combinational Circuits Page 4 Priority...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
CMPT 150 Combinational Circuits Page 1 Implementing an Encoder box5 An Encoder does the opposite of what a Decoder does: 4x2 Enc D 0 D 1 D 2 D 3 A 0 A 1 E D 0 D 1 D 2 D 3 A 1 A 0 1 1 0 0 0 1 0 1 0 0 1 0 0 1 0 0 0 0 1 1 0 box5 It is implemented as follows: A 0 = A 1 = E 1 0 0 0 1 0 X X X X 1 1 X X CMPT 150 Combinational Circuits Page 2 Priority Encoders box5 The encoders we’ve looked at so far have the limitation that only one of the inputs can be 1 at a time E.g. box5 Priority Encoders solve this by behaving such that if two or more inputs are equal to 1 at the same time, the input having the highest priority takes precedence. box5 box5 We also add an output V to indicate whether at least one of the inputs is 1. CMPT 150 Combinational Circuits Page 3 Truth Table for Priority Encoder
Image of page 1

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

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: CMPT 150 Combinational Circuits Page 4 Priority Encoder: K-maps CMPT 150 Combinational Circuits Page 5 Priority Encoder: Logic Diagram CMPT 150 Combinational Circuits Page 6 Multiplexers b Routes one of many inputs to the single output b A 2 n x1 MUX has: b b x1 E S S Y b b Analogy with music: Music selected from different sources (CD player, radio, etc) to be played on only one speaker. 4x1 Mux 1 I I 1 I 2 I 3 CMPT 150 Combinational Circuits Page 7 Multiplexer Implementation 4x1 Mux E S S 1 I I 1 I 2 I 3 Y E S 1 S Y 1 0 0 1 0 1 1 1 0 1 1 1 I I 1 I 2 I 0 X X 3...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern