PIPO Recognition — Which shift register configuration does not connect a stage’s Q (or Q̅) output into the next stage’s input (i.e., no serial chain between stages)?

Introduction:
In many registers, stages are daisy-chained so a bit can shift from one flip-flop to the next. But in a purely parallel register, each stage is loaded and read independently with no inter-stage serial path. Recognizing this architecture helps you choose the right component for buffering or synchronous capture tasks.

Given Data / Assumptions:

• We compare PISO, SIPO, SISO, and PIPO structures.
• “Q to next-stage input” refers to the serial chain typical in shift registers.
• We are looking for the configuration without that chain.

Concept / Approach:
A PIPO register provides parallel inputs and parallel outputs. Each flip-flop captures its input on the clock edge and presents it at its own Q pin. There is no requirement that Q of stage i drives the D of stage i+1; hence there is no serial shifting. This makes PIPO devices ideal for temporary data latching and bus interfacing where word-wide simultaneous capture is required.

Step-by-Step Solution:

Verification / Alternative check:

Why Other Options Are Wrong:

Common Pitfalls:

Final Answer: