PPT-Flip-flops

1 FlipFlops 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. http://www.comp.nus.edu.sg/~cs2100/. Sequential Logic. (AY2015/6 . Semester 1). CS2100. Sequential Logic. 2. WHERE ARE WE NOW?. Number systems and codes. Boolean algebra. Logic gates and circuits. Simplification. 0 0 0 0 0 0 1 1 0 1 0 0 0 1 1 0 1 0 0 1 1 0 1 1 1 1 0 1 1 1 1 0 T flip-flop excitation table T Qcurrent Qnext 0 0 0 0 1 1 1 0 1 1 1 0 Step 2: derive the excitation table from the next stat 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.. Nelly . Altamirano. Bill . Bowker. Dmitriy. Novak. Vanessa . Graciano. Yiwen. Zhang. Main Points. Background facts. Do flip flops . in fact cause . car accidents?. Who is liable in this case?. Calculation of damages. © 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.. Sequential . Logic: Analysis. Read . Mano & . Ciletti. , Sections 5.1 . to . 5.5.. Homework #7 and Lab #7 due next week. . Quiz next week.. Rview. : Useful Building-Block Circuits. Here are some kinds of digital circuits . 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, . 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. Registers and Counters. A register is a group of flip-flops. Each flip-flop stores one bit of info. A counter is a register that goes through a predetermined sequence of binary states. Registers. 4-bit register with . 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.. 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.. 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). Characteristic Equations (6.6.