Stepper motor HDL output behavior: Depending on the ________, the IC changes output states on each input pulse to realize different stepping schemes (wave, full, half). Choose the most appropriate word.

Introduction / Context:
Stepper drivers implemented in HDL usually support multiple stepping schemes such as wave drive, full-step, and half-step. The driver’s response to each clock/pulse depends on the currently selected operating configuration.

Given Data / Assumptions:

• The driver is pulse-driven: one pulse → one transition in the state machine.
• Different modes map pulses to different coil energization sequences.
• “Mode” is often chosen via configuration inputs or registers.

Concept / Approach:
Mode selection determines the active state table inside the controller. In wave mode, only one coil energizes per step; in full-step, two coils energize for higher torque; in half-step, the controller alternates one- and two-coil states to double resolution. Thus, the generic blank is best filled by “mode.”

Step-by-Step Solution:

Verification / Alternative check:

Why Other Options Are Wrong:

Common Pitfalls:

Final Answer: