HDL project methodology: One of the earliest steps is defining scope by identifying all external and internal signals, their directions, and their timing/logic characteristics before detailed coding begins. Assess this guidance.

Introduction / Context:
Successful HDL development requires clear up-front planning. Enumerating signals, their directions, widths, clock domains, and timing constraints prevents rework, integration issues, and ambiguous interfaces later in the project.

Given Data / Assumptions:

• The project has multiple functional blocks.
• External I/O and internal busses must be defined.
• Clock, reset strategy, and handshake protocols must be understood early.

Concept / Approach:
Defining scope means capturing a block diagram, interface tables, and timing requirements. This includes identifying clock rates, active levels for resets, valid windows for data, and throughput/latency requirements. With this information, module boundaries and testbench stimuli align with real needs.

Step-by-Step Solution:
List external interfaces (pins, protocols) with directions and widths.Specify clock domains, reset polarities, and synchronization needs.Define performance targets: frequency, throughput, latency.Capture constraints in the tool (timing, I/O standards) before coding.

Verification / Alternative check:
Projects with early interface definitions compile and integrate more smoothly; design reviews and simulation test plans are easier when signals are documented.

Why Other Options Are Wrong:
Planning is not only for large devices; even small CPLD designs benefit. Testbenches rely on specifications; they are not prerequisites for defining signals. Calling it “not part of planning” contradicts established engineering practice.

Common Pitfalls:
Skipping interface documentation; mixing active-HIGH/LOW conventions; omitting timing budgets leading to violations later.

Final Answer:
Correct