Lecture 2 ECEN 248 Fa 2017 - uProcessor vs Dig Circuits-Switches CMOS.pdf

Lecture 2 ECEN 248 Fa 2017 - uProcessor vs Dig Circuits-Switches CMOS.pdf

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8/25/2017 1 ECEN 248 Lecture #2 – Implementing Digital Circuits; Combinational Logic; Switches; CMOS Transistors; and the Relationship Between Boolean Algebra and Digital Design. Peng Li Department of Electrical and Computer Engineering Texas A&M University Digital Design 2e Copyright © 2010 Frank Vahid 2 Implementing Digital Systems: Programming Microprocessors Vs. Designing Digital Circuits Microprocessors a common choice to implement a digital system Easy to program Cheap (as low as $1) Readily available I3 I4 I5 I6 I7 I2 I1 I0 P3 P4 P5 P6 P7 P2 P1 P0 void main() { while (1) { P0 = I0 && !I1; // F = a and !b, } } 0 F b a 1 0 1 0 1 6:00 7:057:06 9:009:01 time Desired motion-at-night detector Programmed microprocessor Custom designed digital circuit 1.3
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