Lecture7

# Lecture7 - 1/8 ENSC150 Lecture 7 Agenda Three steps of...

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ENSC150 Lecture 7 Agenda Three steps of Design Procedure Optimization of 4-Variable Functions Using K-Map “Don’t Care” Condition 1/8 Lecture 7 Atousa Hajshirmohammadi, SFU

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Introduction Recall the Design procedure: Speciﬁcation: This is usually given to you. Formulation Optimization Technology Mapping Veriﬁcation Today we concentrate on the ﬁrst 3 steps to design some logic systems (circuits) For now we only deal with “combinational logic” as opposed to “sequential”. In combinational logic the outputs at any time depend on the inputs at that time. In sequential logic we have memory elements also, i.e., outputs may depend on inputs at the present time as well as previous times. 2/8 Lecture 7 Atousa Hajshirmohammadi, SFU
Design of BCD-to-Excess-3 Speciﬁcation: This is a logic circuit that takes a BCD code for a decimal digit (recall BCD? Lecture 1) and converts it to an “Excess 3” code, i.e., the binary representation of that digit plus 3. Example 1:

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## This note was uploaded on 04/16/2009 for the course ENSC 150 taught by Professor Dr.atousahashirmohammadi during the Spring '09 term at Simon Fraser.

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Lecture7 - 1/8 ENSC150 Lecture 7 Agenda Three steps of...

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