TK 2123 Lecture 16 The Digital Logic Level

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TK 2123 : Lecture 16 The Digital Logic Level (4) Ass. Prof. Dr. Masri

TK 2123 : Lecture 16 The Digital Logic Level (4) Ass. Prof. Dr. Masri Ayob Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 1

Encoders: Decimal-to-BCD Encoder Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc.

Encoders: Decimal-to-BCD Encoder Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 2

Encoders • 8 -line-to-3 -line encoder Floyd Digital Fundamentals, 9/e Copyright © 2006 by

Encoders • 8 -line-to-3 -line encoder Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 3

Code Converters: BCD-to-binary conversion Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education,

Code Converters: BCD-to-binary conversion Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 4

Multiplexers (Data Selectors) • 4 -input multiplexer Floyd Digital Fundamentals, 9/e Copyright © 2006

Multiplexers (Data Selectors) • 4 -input multiplexer Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 5

Multiplexers (Data Selectors) • Expanded multiplexers Floyd Digital Fundamentals, 9/e Copyright © 2006 by

Multiplexers (Data Selectors) • Expanded multiplexers Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 6

Demultiplexers • 2 -line-to-4 -line demux Floyd Digital Fundamentals, 9/e Copyright © 2006 by

Demultiplexers • 2 -line-to-4 -line demux Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 7

Clocks (a) A clock. (b) The timing diagram for the clock. (c) Generation of

Clocks (a) A clock. (b) The timing diagram for the clock. (c) Generation of an asymmetric clock. Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 8

Latches (3) A clocked D latch. Floyd Digital Fundamentals, 9/e Copyright © 2006 by

Latches (3) A clocked D latch. Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 9

Flip-Flops (1) (a) A pulse generator. (b) Timing at four points in the circuit.

Flip-Flops (1) (a) A pulse generator. (b) Timing at four points in the circuit. Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 10

D flip-flop Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper

D flip-flop Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 11

Flip-Flops (3) D latches and flip-flops. Floyd Digital Fundamentals, 9/e Copyright © 2006 by

Flip-Flops (3) D latches and flip-flops. Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 12

Flip-Flops (4) Dual D flip-flop. Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson

Flip-Flops (4) Dual D flip-flop. Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 13

Memory Organization (1) Logic diagram for a 4 x 3 memory. Each row is

Memory Organization (1) Logic diagram for a 4 x 3 memory. Each row is one of the four 3 bit words. Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 14

Thank you Q&A Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc.

Thank you Q&A Floyd Digital Fundamentals, 9/e Copyright © 2006 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Slide 15