AD-flip-flop with an active-low synchronous ClrN input may be constructed from a regular D flip-flop as follows. ClrN Clk Fill in the timing diagram. For Q1, assume a synchronous ClrN as above, and for Q2, assume an asynchronous ClrN as in Section 11.8. Assume Q1 = Q, = 0 at the beginning. %3D Clk ClrN D

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11.26 The ClrN and PreN inputs introduced in Section 11.8 are called asynchronous
because they operate independently of the clock (i.e., they are not synchronized
with the clock). We can also make flip-flops with synchronous clears or preset inputs.
Transcribed Image Text:11.26 The ClrN and PreN inputs introduced in Section 11.8 are called asynchronous because they operate independently of the clock (i.e., they are not synchronized with the clock). We can also make flip-flops with synchronous clears or preset inputs.
A D-flip-flop with an active-low synchronous ClrN input may be constructed from a
A D-flip-flop with an active-low synchronous ClrN input may be constructed f
regular D flip-flop as follows.
D-
ClrN
Clk
Fill in the timing diagram. For Q1, assume a synchronous ClrN as above, and for
Q2, assume an asynchronous ClrN as in Section 11.8. Assume Q, = Q, = 0 at the
beginning.
%3D
Clk
ClrN
Q2
Transcribed Image Text:A D-flip-flop with an active-low synchronous ClrN input may be constructed from a A D-flip-flop with an active-low synchronous ClrN input may be constructed f regular D flip-flop as follows. D- ClrN Clk Fill in the timing diagram. For Q1, assume a synchronous ClrN as above, and for Q2, assume an asynchronous ClrN as in Section 11.8. Assume Q, = Q, = 0 at the beginning. %3D Clk ClrN Q2
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