Download Digital Design: Principles and Practices (3rd Edition) by John F. Wakerly PDF

By John F. Wakerly

This newly revised e-book blends educational precision and sensible event in an authoritative advent to uncomplicated ideas of electronic layout and functional necessities in either board-level and VLSI structures. With over 20 years of expertise in either commercial and collage settings, the writer covers the main common good judgment layout practices whereas construction a pretty good beginning of theoretical and engineering rules for college kids to take advantage of as they move ahead during this fast-paced box.

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Extra info for Digital Design: Principles and Practices (3rd Edition) Solution Manual

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Also, it is assumed that MPY0 is 1 to find the worst case. The figure on the next page shows the worst-case path, in heavy lines, to be 106 ns. Since we would like to use the same clock for all states, the minimum clock period is 106 ns. 20 The synchronizer fails if META has not settled by the beginning of the setup-time window for FF2, which is 5 ns before the clock edge. Since the clock period is 40 ns, the available metastability resolution time is 35 ns. ” In the switch debounce circuit, the short lasts only for a few tens of nanoseconds, so it’s OK.

The Y2_L output will have a 10-ns glitch, but the others will not. 19 The delay calculation is different, depending on the starting state. In the INIT state, U7 and U8 take 21 ns to propagate the CLEAR signal to the outputs. Then U6 requires 20 ns setup time on its D inputs while U3 requires 20 ns setup time on its RIN input. This implies a minimum clock period of 41 ns, assuming zero delay from the control unit. In states M1–M8, the minimum clock period depends on the delay of the combinational logic in the control unit that asserts SELSUM when MPY0 is asserted.

20 This can be done algebraically. If all of the input combinations are covered, the logical sum of the expressions on all the transitions leaving a state must be 1. If the sum is not 1, it is 0 for all input combinations that are uncovered. For double-covered input combinations, we look at all possible pairs of transitions leaving a state. The product of a pair of transition equations is 1 for any double-covered input combinations. (a) State D, Y = 0 is uncovered. (b) State A, (X+Z′) = 0 is uncovered.

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