lec12 - CS 140 Lecture 12 Standard Combinational Modules...

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1 CS 140 Lecture 12 Standard Combinational Modules Professor CK Cheng CSE Dept. UC San Diego
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2 Part III - Standard Combinational Modules Decoder: Decode address Encoder: Encode address Multiplexer (Mux): Select data by address Demultiplexier (DeMux): Direct data by address Shifter: Shift bit location Adder: Add two binary numbers Multiplier: Multiply two binary numbers
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3 Interconnect: Decoder, Encoder, Mux, DeMux P1 Memory Bank Mux, P2 Pk Demux Decoder Mux Data Address Address k Address 2 Address 1 Data 1 Data k Arbiter n n-m m 2 m
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4 1. Decoder Definition Logic Diagram Application (Universal Set) Tree of Decoders
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5 1. Decoder: Definition 0 y 0 y 1 y 7 I 0 I 1 I 2 1 2 0 1 2 3 4 5 6 7 EN (enable) n inputs n= 3 2 n outputs 2 3 = 8 y i 2, I 1, I 0 ) = i y i = 0 otherwise n to 2 n decoder function: . .
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6 N inputs, 2 N outputs One-hot outputs: only one output HIGH at once 1. Decoder: Definition 2:4 Decoder A 1 A 0 Y 3 Y 2 Y 1 Y 0 00 01 10 11 0 0 0 1 1 0 1 1 0 0 0 1 Y 3 Y 2 Y 1 Y 0 A 0 A 1 0 0 1 0 0 1 0 0 1 0 0 0
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This note was uploaded on 01/07/2011 for the course CSE 140 taught by Professor Rosing during the Spring '06 term at UCSD.

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lec12 - CS 140 Lecture 12 Standard Combinational Modules...

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