Frequency counter data path: when is the new count transferred to the display register? Consider the timing of a gated frequency counter in HDL. Identify when the fresh count value is latched into the display register for stable presentation.

Introduction / Context:
In a gated frequency counter, the measurement cycle consists of opening a timing gate, counting input pulses, closing the gate, and then transferring the stable result to a display register while the next measurement begins. This requires coordinated timing and control.

Given Data / Assumptions:

• A dedicated timing/control FSM (finite state machine) orchestrates gate, count, and latch operations.
• Display register must capture the count only when stable (post gate-close).
• Transfer may coincide with a latch/LD signal generated by control logic.

Concept / Approach:
The transfer is explicitly commanded by the timing/control block after the counting window ends. This guarantees that the displayed value does not glitch while counting continues internally for the next interval.

Step-by-Step Solution:

Verification / Alternative check:
Simulations show clean latch timing edges aligning with end-of-gate signals.

Why Other Options Are Wrong:

• A/C describe phases but not the authoritative transfer event.
• B: “Buffer full” is not a standard event in simple counters.

Common Pitfalls:
Capturing mid-count causes flicker or incorrect readings.

Final Answer:
When the timing and control block has put it there