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VHDLBeginner

Testbench: 4-bit subtractor (VHDL)

Verify difference and borrow for subtractions with and without borrow.

Exercise objective

The DUT subtracts two words and indicates the difference and borrow.

Prerequisites

  • Read signals and write assertions in a VHDL testbench.
  • Understand the circuit under test: The DUT subtracts two words and indicates the difference and borrow.

Skills you will practice

  • Difference
  • Borrow
  • Boundary

Equipment and tools

  • The VHDL editor and validation are available in the browser. You do not need an FPGA board for this exercise.

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