lecture09

# lecture09 - : Transform the logic diagram to a new diagram...

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CMPT 150 Combinational Circuits Page 1 Design Process b Typically the design process is performed top- down b This means the circuit function is specified by a text description plus constraints on cost, performance, and reliability b Hardware Description Languages such as VHDL allow designers to describe the circuit function using a kind of programming language b CMPT 150 Combinational Circuits Page 2 Steps in the Design Process b Specification : Write a specification for the circuit. b Formulation : Derive the truth table or initial Boolean equations that define the required relationship between inputs and outputs. b Optimization : Use k-maps to come up with a logic diagram for the resulting circuit using ANDs, ORs, and inverters. b Technology Mapping

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Unformatted text preview: : Transform the logic diagram to a new diagram using the available implementation technology. b Verification : Verify the correctness of the final design. CMPT 150 Combinational Circuits Page 3 Example: Design of a BCD-to-Excess-3 Code Converter b Specification: The excess-3 code for a decimal digit is the binary combination corresponding to the decimal digit plus 3. The circuit should convert a BCD digit to an excess-3 digit. CMPT 150 Combinational Circuits Page 4 BCD to Excess-3 Code Converter: Formulation Truth table for code converter: CMPT 150 Combinational Circuits Page 5 Code Converter: Optimization CMPT 150 Combinational Circuits Page 6 Code Converter: Logic Diagram...
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## This note was uploaded on 04/27/2011 for the course CMPT 150 taught by Professor Dr.anthonydixon during the Spring '08 term at Simon Fraser.

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lecture09 - : Transform the logic diagram to a new diagram...

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