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Digital Fundamentals

Digital Fundamentals. CHAPTER 7 Latches, Flip-Flops and Timers. Latches. Latches. S-R (Set-Reset) latch Gated S-R latch Gated D latch. Latches. S-R latch. S-R latch. Latches. Latches. Gated S-R latch. Latches. Gated D latch. Edge-Triggered Flip-Flops. Edge-Triggered Flip-Flops.

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Digital Fundamentals

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  1. Digital Fundamentals CHAPTER 7Latches, Flip-Flops and Timers

  2. Latches

  3. Latches • S-R (Set-Reset) latch • Gated S-R latch • Gated D latch

  4. Latches • S-R latch

  5. S-R latch Latches

  6. Latches • Gated S-R latch

  7. Latches • Gated D latch

  8. Edge-Triggered Flip-Flops

  9. Edge-Triggered Flip-Flops • Edge-triggered S-R flip-flop • Edge-triggered D flip-flop • Edge-triggered J-K flip-flop

  10. Waveforms Edge-Triggered Flip-Flops • Edge-triggered S-R flip-flop

  11. Edge-Triggered Flip-Flops • Edge-triggered S-R flip-flop

  12. Waveforms Edge-Triggered Flip-Flops • Edge-triggered D flip-flop

  13. Edge-Triggered Flip-Flops • Edge-triggered D flip-flop

  14. Waveforms Edge-Triggered Flip-Flops • Edge-triggered J-K flip-flop

  15. Edge-Triggered Flip-Flops • Edge-triggered J-K flip-flop

  16. Flip-Flop Operating Characteristics

  17. Flip-Flop Operating Characteristics • Propagation delay times • Set-up time • Hold time • Maximum clock frequency • Pulse widths • Power dissipation

  18. Flip-Flop Applications

  19. Flip-Flop Applications • Parallel data storage • Frequency division • Counting

  20. Flip-Flop Applications • Parallel data storage

  21. Flip-Flop Applications • Frequency division

  22. Flip-Flop Applications • Counting

  23. One-Shots

  24. One-Shots • Nonretriggerable one-shot • Regriggerable one-shot

  25. One-Shots • Nonretriggerable one-shot

  26. One-Shots • Nonretriggerable one-shot

  27. One-Shots • Regriggerable one-shot

  28. One-Shots • Regriggerable one-shot

  29. The 555 Timer

  30. The 555 Timer • Monostable (one-shot) operation • Astable operation

  31. tw=1.1R1C1 The 555 Timer • Monostable (one-shot) operation

  32. The 555 Timer • Astable operation

  33. CPLD Macrocells (Altera or Xilinx)

  34. CPLD Macrocells (Altera or Xilinx) • The Altera MAX 7000 macrocell • The Xilinx CoolRunner-II macrocell

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