PPT-7. Latches and Flip-Flops

Digital Computer Logic Latches SR Latch Gated SR Latch D Latch RQ2011 2 A latch is a temporary storage device that has two stable states bistable It is a basic form of memory The SR SetReset latch is the most basic type It can be constructed from NOR gates or NAND gates With NOR gates the latch responds to activeHIGH inputs with NAND gates it responds to activeLOW inputs. Lecture 24. Announcements. Homework 8 due today. Exam 3 on Tuesday, 11/25.. Topics for exam are up on the course webpage.. Agenda. Last time:. Master-Slave Flip-Flops (6.4). Edge-Triggered Flip-Flops (6.5). Lecture 23. Announcements. Homework 8 due Thursday, 11/20. Exam 3 coming up on Tuesday, 11/25. Exam Topics. MSI Components: . Binary adders/. Subtracters. , Carry . Lookahead. Adder, Large High-Speed Adders, Decimal Adders, Comparators, Decoders, Logic Design Using Decoders, Decoders with enable input, Encoders, Multiplexers, Logic Design with Multiplexers.. 1. Flip-Flops. Last time, we saw how latches can be used as memory in a circuit.. Latches introduce new problems:. We need to know when to enable a latch.. We also need to quickly disable a latch.. In other words, it. Flip - Digital Electronics TM 3.1 Introduction to Flip - Flops Project Lead The Way, Inc. Copyright 2009 1 Digital Electronics Flip - Flops & Latches Flip - Flops & Latches 2 This presentation will Sequential Circuits. Part 1. KFUPM. Courtesy of Dr. Ahmad . Almulhem. Objectives. Sequential Circuits. Storage Elements (Memory). Latches. Flip-Flops. KFUPM. Combinational vs Sequential. A . combinational. Slice and I/O Resources. Objectives. After completing this module, you will be able to:. Describe the CLB and slice resources available in Virtex-6 FPGAs. Describe flip-flop functionality. Anticipate building proper HDL code for Virtex-6 FPGAs. © 2014 Project Lead The Way, Inc.. Digital Electronics. Flip-Flops & Latches. 2. This presentation will. Review sequential logic and the flip-flop.. Introduce the D flip-flop and provide an excitation table and a sample timing analysis.. Lecture 9: . Sequential Networks: Implementation. CK Cheng. Dept. of Computer Science and Engineering. University of California, San Diego. 1. Implementation. Format and Tool. Mealy & Moore Machines, Excitation Table. A. Yaicharoen. 2. Flip-Flops. A . flip-flop is a bi-stable device: a circuit having 2 stable conditions (0 or 1. ). A flip-flop circuit has two outputs and the outputs of the flip-flop always complement each other, . Read . Kleitz. , Chapter 10.. Homework . #10 and Lab #10 due . next week.. Quiz . next week.. Combinational Logic versus Sequential Logic. A . combinational logic circuit. is a circuit whose output depends only on the circuit’s present inputs. (“Has no memory of the past.”). Register is built with gates, but has memory.. The only type of flip-flop required in this class – the D flip-flop . Has at least two inputs (both 1-bit): D and . clk. Has at least one output (1-bit): Q. Chapter 5. Sequential Circuits. Combinational circuits storage (store binary information). Binary information stored defines the state of the sequential circuit. External input present state determine the binary value of outputs and change state in storage elements. Digital Electronics. Flip-Flops & Latches. 2. This presentation will. Review sequential logic and the flip-flop.. Introduce the D flip-flop and provide an excitation table and a sample timing analysis.. Lecture. Digital Systems. All inputs that we have been studying in all the flip-flops (D, S-R, J-K, and T) are . synchronous. inputs because their effect on the FF output is synchronized with the clock input..