What is Control Unit?
                     What is Control Unit?
A control unit in industrial automation is like the 
brain of a system. It's a component that manages 
and coordinates various tasks within a machine or a 
process.
Hardwired Control 
Unit
Types Of control 
Units
Microprogrammed 
Control Unit
Hardwired 
Control Unit
• This type of control unit is built directly 
into the hardware of the computer. It 
uses a fixed set of instructions to control 
the data flow within the CPU (Central 
Processing Unit). Think of it like a set of 
rules hardwired into the computer's 
circuits that can't be changed.
Microprogrammed 
Control Unit
• Microprogrammed control units use 
microcode, which is a set of instructions 
stored in memory. This allows for more 
flexibility since the control unit's 
behavior can be changed by modifying 
the microcode. 
Application of Control Unit 
Instruction Instruction Operand 
Fetch Decoding Fetch
Update 
Execution Write Back Program 
Counter
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