Shift Registers

Q1: How can parallel data be taken out of a shift register simultaneously?

A Tie all of the Q outputs together.

B Use the Q output of each FF.

C Use the Q output of the last FF.

D Use the Q output of the first FF.

ANS:D - Use the Q output of each FF.

The PIPO shift register is the simplest of the four configurations as it has only three connections, the parallel input (PI) which determines what enters the flip-flop, the parallel output (PO) and the sequencing clock signal (Clk).

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