The Digital Logic Level (4)

FloydFloydDigital Fundamentals, 9/eDigital Fundamentals, 9/e

Copyright ©2006 by Pearson Education, Inc.Copyright ©2006 by Pearson Education, Inc.Upper Saddle River, New Jersey 07458Upper Saddle River, New Jersey 07458

All rights reserved.All rights reserved.Slide 1

The Digital Logic Level (4)The Digital Logic Level (4)

Ass. Prof. Dr. Masri Ayob

TK6123 : Lecture 16




Encoders: Decimal-to-BCD EncoderEncoders: Decimal-to-BCD Encoder




Encoders Encoders

• 8-line-to-3-line encoder8-line-to-3-line encoder




Code ConvertersCode Converters: : BCD-to-binary conversionBCD-to-binary conversion




Multiplexers (Data Selectors)Multiplexers (Data Selectors)

• 4-input multiplexer4-input multiplexer




Multiplexers (Data Selectors)Multiplexers (Data Selectors)

• Expanded multiplexersExpanded multiplexers




DemultiplexersDemultiplexers

• 2-line-to-4-line demux2-line-to-4-line demux




ClocksClocks

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




Latches (3)Latches (3)

A clocked D latch.A clocked D latch.




Flip-Flops (1)Flip-Flops (1)

(a) A pulse generator.(a) A pulse generator.(b) Timing at four points in the circuit.(b) Timing at four points in the circuit.




D flip-flopD flip-flop





D latches and flip-flops.D latches and flip-flops.





Dual D flip-flop.Dual D flip-flop.




Memory Memory Organization (1)Organization (1)

Logic diagram for Logic diagram for a a

4 x 3 memory. 4 x 3 memory.

Each row is one Each row is one of the four 3-of the four 3-bit words. bit words.




Thank youThank youQ&AQ&A

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The Digital Logic Level (4)