HDL digital clock integration flow: In an Altera/Intel-style project, AHDL block codes (text) can be instantiated and interconnected using graphic design files (block-diagram entry). Evaluate this integration statement.

Introduction / Context:
FPGA/CPLD design flows often allow mixing text-based HDL modules with graphical block diagrams. In the historical MAX+PLUS II / Quartus flows, AHDL or VHDL entities can be placed as symbols within a Graphic Design File (GDF) for top-level integration.

Given Data / Assumptions:

• AHDL blocks compiled into entities with defined ports.
• Graphic editor that can instantiate symbols representing HDL entities.
• Signals are wired graphically between instances to form the top level.

Concept / Approach:
This mixed-entry methodology facilitates rapid system integration: HDL provides behavior, and the graphic file serves as a visual netlist. The tool auto-generates symbol files from compiled HDL entities, enabling consistent port mapping and hierarchical design practices.

Step-by-Step Solution:
Write/compile AHDL entities → tool produces symbols.Open graphic design file → place symbols of AHDL blocks.Wire interconnects (clocks, enables, buses, resets) between symbols.Compile/system-fit the combined design and generate programming files.

Verification / Alternative check:
Project trees show mixed sources; successful compilation and correct pin assignments confirm proper symbol interconnection and net resolution.

Why Other Options Are Wrong:
It is not limited to VHDL; AHDL also supports symbol instantiation. Schematic netlists are optional, not mandatory. The approach works for both CPLDs and FPGAs.

Common Pitfalls:
Not re-generating symbols after port changes; mismatched bus widths; forgetting to assign pins at the top level.

Final Answer:
Correct