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Register Terminology — In a multi-bit register, a “stage” refers to a single flip-flop (one storage element) that holds one bit. Evaluate the statement: “A stage is two storage elements in a register.”

Difficulty: Easy

Correct Answer: Incorrect

Explanation:


Introduction:
The word “stage” is used consistently in the context of registers and shift registers to denote one bit of storage, typically implemented by a single flip-flop (FF). This question challenges a wrong definition that doubles the storage per stage.

Given Data / Assumptions:

  • Registers are built from cascaded flip-flops.
  • Each flip-flop holds 1 bit.
  • Shift registers connect stages in series for data movement.


Concept / Approach:
A 4-bit register has four stages; each stage is one flip-flop. While an edge-triggered FF can be implemented internally as a master-slave pair of latches, the architectural unit of storage seen by the designer is still one bit per stage. Therefore the statement “A stage is two storage elements” conflates internal FF construction with top-level register staging.

Step-by-Step Solution:

Define “stage” = one FF = one bit.Master-slave implementation detail does not double the register’s bit count.Thus, a 4-stage register stores 4 bits, not 8.


Verification / Alternative check:

Datasheets and textbooks enumerate “n-stage shift register” to mean “n bits capacity,” confirming one bit per stage.


Why Other Options Are Wrong:

Correct: Misstates the standard definition.True only for master-slave FFs: Internal latches do not define the stage count.Depends on bit width: Stage definition is independent of total width.


Common Pitfalls:

Equating internal latching with external capacity.Assuming two latches equal two bits; in a master-slave FF they represent one bit.


Final Answer:

Incorrect
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