logging in or signing up Flip-Flop jit_1942 Download Post to : URL : Related Presentations : Let's Connect Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 13977 Category: Education License: All Rights Reserved Like it (5) Dislike it (0) Added: December 15, 2008 This Presentation is Public Favorites: 2 Presentation Description FF Comments Posting comment... By: crizwani (31 month(s) ago) plz temme how to download this ppt.. m olready a user in author stream plsss. we need fr xams Saving..... Post Reply Close Saving..... Edit Comment Close By: suryabindhu (37 month(s) ago) how to download this Saving..... Post Reply Close Saving..... Edit Comment Close By: kaleemakram (39 month(s) ago) i wana download this one tell me how i can ??? Saving..... Post Reply Close Saving..... Edit Comment Close By: dhavalmca (41 month(s) ago) Hi i need this for personal usage as am too dumb with the circuit diagrams and understand too less of it could u please drop in a line as of how to download the presentation it would be very graceful to me ..... thanx Regards, Dhaval. Saving..... Post Reply Close Saving..... Edit Comment Close By: divyamadhuri (41 month(s) ago) we need this presentation for reference Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript Flip-Flops : Flip-Flops Basic RS Flip-Flop (NAND) : Basic RS Flip-Flop (NAND) A flip-flop holds 1 "bit". "Bit" ::= "binary digit." Clocked D Flip-Flop : Clocked D Flip-Flop The present state is held when CP is low. Clock Pulse Definition : Clock Pulse Definition Edges can also be referred to as leading and trailing. Master-Slave Flip-Flop : Master-Slave Flip-Flop Flip-Flop on RT54SX-A(Not hardened) : Flip-Flop on RT54SX-A(Not hardened) RT54SX-A SEU Performance : RT54SX-A SEU Performance RT54SX-S Latch(SEU Hardened) : RT54SX-S Latch(SEU Hardened) Flip-Flop Timing: RT54SX-S : Flip-Flop Timing: RT54SX-S Slide 10: Metastability - Introduction Can occur if the setup, hold time, or clock pulse width of a flip-flop is not met. A problem for asynchronous systems or events. Can be a problem in synchronous systems. Three possible symptoms: Increased CLK -> Q delay. Output a non-logic level Output switching and then returning to its original state. Theoretically, the amount of time a device stays in the metastable state may be infinite. Many designers are not aware of metastability. Slide 11: Metastability In practical circuits, there is sufficient noise to move the device output of the metastable state and into one of the two legal ones. This time can not be bound. It is statistical. Factors that affect a flip-flop's metastable "performance" include the circuit design and the process the device is fabricated on. The resolution time is not linear with increased circuit time and the MTBF is an exponential function of the available slack time. Slide 12: Metastability - Calculation MTBF = eK2*t / ( K1 x FCLK x FDATA) t is the slack time available for settling K1 and K2 are constants that are characteristic of the flip-flop Fclock and Fdata are the frequency of the synchronizing clock and asynchronous data. Software is available to automate the calculations with built-in tables of parameters. Not all manufacturers provide data. Slide 13: Metastability - Sample Data Slide 14: Synchronizer (Bad Circuit) Metastable State:Possible Output from a Flip-flop : Metastable State:Possible Output from a Flip-flop Metastable State:Possible Outputs from a Flip-flop : Metastable State:Possible Outputs from a Flip-flop Correct Output Parallel Registers : Parallel Registers 4-Bit Parallel Register : 4-Bit Parallel Register 4-Bit Register With Enable : 4-Bit Register With Enable Register Files (Simplified) : Register Files (Simplified) D and Q are both sets of lines, with the number of lines equal to the width of each register. There are often multiple address ports, as well as additional data ports. Memory Devices : Memory Devices Slide 22: Register MagneticCoreMemory Sense wires serve as OR plane. Slide 23: SemiconductorMemory Decoder (AND plane) OR plane Slide 24: Rad-Hard PROM Architecture No latches in this architecture W28C64 EEPROMSimplified Block Diagram : W28C64 EEPROMSimplified Block Diagram A6-12 A0-5 CE* WE* OE* CLK I/O0-7 Latch Enable PE RSTB VW You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.