Laboratory 1

Aim: to design, simulate (using XILINX) and implement a 2-bit integer division circuit.

Material needed: Protoboard, TTL gates (inverters, AND, ORs, NORs), DIP switches, LEDs, resistors (0.25W 1K Ohms and 0.25W 330 Ohms), wires for protoboard.

Description: Design and implement a 2-bit integer division circuit. The circuit has four inputs A₁, A₀, B₁, B₀ and five outputs Q₁, Q₀, R₁, R₀, E. The values on A₁, A₀ and B₁, B₀ are treated as unsigned binary integer number A and B respectively. The circuit should generate the quotient Q and remainder R of the division A/B on lines Q₁, Q₀ and R₁, R₀ respectively. If division by zero is attempted, line E is set '1' (else E is '0') and the values on lines Q₁, Q₀, R₁, R₀ are considered invalid.

Prelab:

1. Specify the truth table.

2. Derive necessary Boolean equations.

3. Draw gate-level logic diagram (logic gate symbols).

4. Draw chip-level schematic diagram (chips with pin assignment).

Demo: Build the circuit and demonstrate its operation by applying different input sequences. Use DIP switches to generate the inputs and LEDs to display the outputs.

Lab Report: