'Synchronous inputs' diaporamas de présentation

comp.nus.sg/~cs2100/

http://www.comp.nus.edu.sg/~cs2100/. Lecture # 19. Sequential Logic. Lecture # 19: Sequential Logic (1/2). Introduction Memory Elements Latches 3 .1 S-R Latch 3 .2 D Latch Flip-flops 4 .1 S-R Flip-flop 4 .2 D Flip-flop 4 .3 J-K Flip-flop 4 .4 T Flip-flop.

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EENG 2710 Chapter 6

EENG 2710 Chapter 6. Introduction to Sequential Logic. Chapter 6 Homework. Work on your project. Sequential Circuit. A digital circuit whose output depends not only on the present combination of input, but also on the history of the circuit. Sequential Circuit Elements. Two basic types:

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State Machine Signaling

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Sequential Logic Latches & Flip-flops

Sequential Logic Latches & Flip-flops. Introduction Memory Elements Pulse-Triggered Latch S-R Latch Gated S-R Latch Gated D Latch Edge-Triggered Flip-flops S-R Flip-flop D Flip-flop J-K Flip-flop T Flip-flop Asynchronous Inputs. Combinational outputs. Memory outputs.

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Flip-flops

Flip-flops. Outline. Edge-Triggered Flip-flops S-R Flip-flop D Flip-flop J-K Flip-flop T Flip-flop Asynchronous Inputs. Outline. Edge-Triggered Flip-flops S-R Flip-flop D Flip-flop J-K Flip-flop T Flip-flop Asynchronous Inputs. Clock signal. Positive edges. Negative edges.

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Timing Methodology

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Chapter #6: Sequential Logic Design

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Digital Design Lecture 2 Sequential Circuits: Flip flops

Digital Design Lecture 2 Sequential Circuits: Flip flops. Overview. Latches respond to trigger levels on control inputs Example: If G = 1, input reflected at output Difficult to precisely time when to store data with latches Flip flips store data on a rising or falling trigger edge.

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DFFs are most common

DFFs are most common. Most programmable logic families only have DFFs DFF is fastest, simplest (fewest transistors) of FFs Other FF types (T, JK) can be built from DFFs We will use DFFs almost exclusively in this class

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