EEL 3705 / 3705L Digital Logic Design Fall 2006 Instructor: Dr. Michael Frank 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

M. Frank, EEL3705 Digital Logic, Fall 2006 Lecture Outline Overview of the subject area: What’s Digital Logic Design all about? Overview of the course: Syllabus, policies, procedures Administrative matters: Sign-in sheet, Prereq form, Blackboard, 1st assignment 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

What do we mean by “Digital Logic Design?” Using discrete physical states (e.g., on/off transistor, high/low voltage) to represent information Logic Using the basic operations of Boole’s algebra of logic to interpret, manipulate and process information Design To conceive, plan, analyze and construct the structure of working systems that will meet application requirements 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

Applications of Digital Logic Design All complex electronic systems today rely heavily on components whose design and operation is based (almost entirely) on digital logic principles, including: Microprocessors and microcontrollers The heart of the modern computer, and also embedded within all manner of other consumer and industrial electronic devices Digital Signal Processors Used in cellphones, cameras, networking equipment FPGAs (Field-Programmable Gate Arrays) Used for prototyping & in a wide range of equipment ASICs (Application-Specific Integrated Circuits) Semi-custom, used in many specialized applications 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

Electrical & Computer Engineering and the Design of Electronic Systems Although electrical engineering and computer engineering are considered different disciplines, it’s important to always remember that any complex electronic component includes both: Physical/electrical characteristics Such as power, current, inductance, capacitance, etc. And computation-related characteristics E.g., information content, logical function, software, protocols To successfully design working systems requires multidisciplinary teams that understand and can take care of the engineering considerations on both sides! 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

What does a modern Digital Logic Designer do? System-level requirements Functional design Design engineering, in general, involves taking abstract, system-level requirements, and translating them into ever more concrete and specific designs for technological artifacts. Digital Logic Design is no different. In modern industrial practice, increasingly many of the steps of the design process have been automated. This is true for digital functions especially. See e.g. resources at eda.org Today, computer-based tools do most of the “grunt work” and “heavy lifting” But, the designer has to understand what the tools are doing in order to use them! Functional or behavioral specification Structural design Schematic or structural specification Logic design Gate-Level Design Design compiler Circuit synthesis FPGA Program Transistor-level Schematics Loading Layout Configured FPGA VLSI Mask Layers Fabrication Physical chip 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

The Basis of Digital Logic today: The MOSFET Nearly all digital systems today (2006) are based on an electronic device called the MOSFET Metal-Oxide-Semiconductor Field-Effect Transistor This device is a voltage-controlled switch Two basic types of FET: nFET: The dominant charge carriers are electrons (negative) Conducts low voltages well pFET: The dominant charge carriers are holes (positive) Conducts high voltages well gate source drain nFET icon used in schematics 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

Today’s Dominant Logic Style: CMOS Most logic today is done in the CMOS (Complementary MOS) logic style Each logic “gate” (hardware to do a given logic operation) is built using both nFETs and pFETs nFETs pull output low, pFETs pull it high Uses energy mainly only when switching Here are a simple CMOS inverter circuit and its logic gate icon When input is high (1) output is low (0) and vice-versa. This and a few other simple gates are sufficient to build any digital system! Vdd (PWR) Vin Vout Vss (GND) in out = ¬in 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

M. Frank, EEL3705 Digital Logic, Fall 2006 Course Overview Go through syllabus posted on Blackboard 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

Administrative Matters Sign the attendance sheet being passed around… Clearly print your preferred email address Pick up and sign a prerequisite form… Turn it in at the end of class Make sure you are enrolled on Blackboard Email Dr. Frank if you aren’t Download the Quartus II software Labs begin next week! 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006

First-Day Homework Assignment To be completed by this Wednesday’s lecture No time to waste! The assignment is: 1. Turn in the signed course prerequisite form to Dr. Frank Preferably, at the end of today’s lecture 2. Ensure you are enrolled for the course on Blackboard Email instructor at mpf@eng.fsu.edu immediately if not 3. On your home or laptop computer, download & install the Quartus II software (web version) Available from altera.com (see link on Blackboard) 11/15/2018 M. Frank, EEL3705 Digital Logic, Fall 2006