Initializing an asynchronous input signal on D flip-flops

Discussion in 'Homework Help' started by zyphirr, Mar 22, 2009.

  1. zyphirr

    Thread Starter New Member

    Feb 14, 2009
    1) Use an asynchronous input signal called INIT to initialize the
    flip-flops to the initial state (assume initial state is A).

    Does this mean to tie the Set/Preset together and simply call it INIT?
    What does the "assume initial state is A" mean?

    2) Suppose you want to initialize three D flip-flops Q3 Q2 Q1 to an initial state 011, using an asynchronous input signal INIT. (That is, when INIT = 1, initialize the flip-flops to 011.) Show how to hook up the INIT signal to achieve this using minimal hardware (draw the flip-flops, INIT signal, etc.).

    Does this mean the same thing:
    i.e., tie the Set/Preset together and add an inverter to Q3?

    Thanks in advance!