Arithmetic logic unit

Introduction of Arithmetic logic unit

The objective of this Assignment is to plan along with implement the 8-bit ALU (Arithmetic logic unit). ALU (arithmetic logic unit) is a combinational digital electronic circuit. On integer binary numbers ALU performs arithmetic along with bitwise operation using the programming language VHDL. To acquire the purpose it is significant toward recognize and other combinational logic circuits implementation, for example full subtract or adder that could be combined to produce our result. There is the 3 main logic block one is Arithmetic unit, logic unit and 1 to 2 decoder or the final output 2 to 1 Mux to determine. To establish the desired output it uses the four bit selector that depends on a truth table as shown in figure.

Figure: Arithmetic logic unit diagram

Truth table of Arithmetic logic unit

Here above waveform is the result of the test bench that is used to assign the value through the selector bits. Only a small snippet was included since the waveform was quite long. From the ALU with the top being an output when the Arithmetic unit was selected. Moreover, in the output wave there is the delay of 100ns.The correct output could be observed when shifted.

Conclusion of Arithmetic logic unit

It is concluded that with the test result that is seen in the above section. We concluded that this assignment is successfully done as the ALU functional was produced. In many applications this component can form the building as well as for understanding adders this is the excellent opportunity that is provided by this experiment. It is conducted that student also learned about the VHDL programming.