PDF-Lecture #11: Latches, Flops,and Metastability Paul HartkeStanford EE12

1 AdministriviaMake sure to fill out TA evaluations150Incentive 5 Point bonus on Lab 6 149Lab 6 is only worth 60150Everything is anonymous149Lab 6 Prelab is due Midnight on Thursday. ELECTRONICS RevB4/21/2010(2:04PM)Prof.AliM.NiknejadUniversityofCalifornia,BerkeleyCopyrightc\r2010byAliM.Niknejad A.M.NiknejadUniversityofCalifornia,BerkeleyEE100/42Lecture24p.1/20 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. By. Dr. Amin Danial Asham. References. An Introduction to Logic Circuit Testing. 3. LEVEL-SENSITIVE . SCAN . DESIGN (LSSD). The . level-sensitive. . aspect of the . method means . that a sequential circuit is designed so that the steady-state response to any input . 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 IAMbovier@uni-bonn.de21.09.2011 Plan 1.Metastability:basicideasandapproaches2.Metastability:potentialtheoreticapproach3.TherandomeldCurieWeissmodel MetastabilityinStochasticDynamics,Paris21.09.20112( 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. © 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.. Digital Computer Logic. Latches. S-R Latch. Gated S-R 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 S-R (Set-Reset) latch is the most basic type. It can be constructed from NOR gates or NAND gates. With NOR gates, the latch responds to active-HIGH inputs; with NAND gates, it responds to active-LOW inputs.. © 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.. 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. Drysdale. Objectives of Lecture. The objectives of this lecture are: . to discuss the difference between . combinational . and. . sequential . logic as well as the difference between . asynchronous. 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.. ECE 111. The “Inferred Latch” Problem. In a combinational always statement, always@(*), . and functions, “case. ” and “if-then-else” statements must be . completely specified . for all signals.. 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..