###
**Arithmetic Logic Unit**

**Arithmetic Logic Unit**

Arithmetic Logic Unit(ALU) is a Multioperation Combinational logic circuit that can perform various arithmetic and logicl operations.It is the heart of any microprocessor/microcontroller system.

The block diagram of a 4 bit ALU is shown below.

A and B are two four bit input lines which is used to select a particular operation in the unit.The selection lines are decoded within the ALU.F is the output.S2 is mode select.It is set to 0 for Arithmetic Operation and 1 for logical Operations S1 and S0 are select lines used for performing four types of Arithmetic or Logical Operations.Cin and Cout are carry input and output lines.

Functional Table

Great Article. i read every post in this blog.

ReplyDeleteFind Daily GK Updates, Government Jobs, bank recruitment.