Introduction to Digital Design

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Introduction to Digital Design

• ELEC 311
• Digital Logic and Circuits
• Dr. Ron Hayne
• Images Courtesy of John Wakerly and Prentice-Hall

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Admin

• Course materials available online
• http//ece.citadel.edu/hayne/
• Students are encouraged to print lecture slides
  in advance and use them to take notes in class
• Projects done in groups of 2
• FPGA Trainers
• Project Reports

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Analog versus Digital

• Analog
• Continuous
• Time
• Magnitude
• e.g.
• Voltage, Current, Temperature
• Digital
• Discrete
• 0, 1
• Low, High
• True, False

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Digital Systems

• Still Pictures
• Video Recordings
• Audio Recordings
• Automobile Carburetors
• Telephone Systems
• Traffic Lights
• Movie Effects

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Why Digital?

• Reproducibility of Results
• Ease of Design
• Flexibility and Functionality
• Programmability
• Speed
• Economy
• Steadily Advancing Technology

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Digital Devices

• Combinational Circuits
• Logic Gates
• AND
• OR
• NOT
• Sequential Circuits
• Flip-flops
• Stores State
• Memory

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Logic Gates
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Logic Values
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Software Tools

• Schematic Entry
• Draw schematic diagrams
• Hardware Description Languages (HDLs)
• Design description
• Compilers Synthesizers
• Converts HDLs into circuit realization
• Simulators
• Predict circuit behavior prior to fabrication
• Test Benches
• Exercise functional and timing behavior

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Integrated Circuits

• Small Scale Integration (SSI)
• Dual In-line Packages (DIP)
• Logic Gates

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Integrated Circuits

• Medium Scale Integration (MSI)
• Functional Building Blocks

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Integrated Circuits

• (Very) Large Scale Integration ((V)LSI)
• Programmable Logic Devices
• Microprocessors
• Memories

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Digital Design Levels

• Switch Model

• Transistor Model

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Digital Design Levels

• VHDL Behavioral Model

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Digital Design Levels

• Truth Table

• Boolean Equation
• Z S'A SB
• Logic Diagram

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Digital Design Levels

• VHDL Structural Model

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Summary

• Introduction to Digital Design
• Analog vs Digital
• Digital Devices
• Integrated Circuits
• Digital Design Levels