PLD Taxonomy — Which of the following is NOT a recognized PLD class? Pick the option that does not correspond to a standard programmable logic device family.

Introduction / Context:
Programmable logic device families are commonly grouped into SPLD (simple PLD), CPLD (complex PLD), and FPGA (field-programmable gate array). Knowing the taxonomy helps navigate datasheets and toolflows across vendors.

Given Data / Assumptions:

• SPLD includes PAL/GAL/PLA-style devices.
• CPLD aggregates multiple macrocells/blocks with predictable timing.
• FPGA employs fine-grained LUTs, routing, and often embedded IP.

Concept / Approach:
Check each term against standard literature. SPLD, CPLD, and FPGA are canonical. “HPLD” is not a standard family acronym in mainstream usage, so it is the outlier.

Step-by-Step Solution:
Validate SPLD: recognized term.Validate CPLD: recognized term.Validate FPGA: recognized term.Identify HPLD: not a standard class → correct choice.

Verification / Alternative check:
Vendor training material and textbooks consistently use SPLD/CPLD/FPGA; “HPLD” does not appear as a family category.

Why Other Options Are Wrong:

• SPLD, CPLD, FPGA: all legitimate PLD classes.

Common Pitfalls:
Assuming any acronym ending in “PLD” is a formal class; stick to widely accepted terms.

Final Answer:
HPLD