Question:
In hardwired control, the control signals are generated :
In hardwired control, the control signals are generated :
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Hardwired = Fast but Rigid (Fixed Gates). Microprogrammed = Slower but Flexible (Stored in ROM). Think of hardwired as a "fixed-gear" bike vs microprogrammed as a "multi-speed" bike with a gear shifter.
Updated On: Aug 6, 2026
- by microprogram stored in memory
- by fixed combinational circuits
- using PLA only
- Sequentially from ROM
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The Correct Option is B
Solution and Explanation
Concept:
• A Control Unit (CU) manages the flow of data through the CPU. There are two main types: Hardwired and Microprogrammed.
• Hardwired control is built using physical hardware components like logic gates.
• Microprogrammed control uses software-like code (microinstructions) stored in a control memory.
Step 1: Analyze Hardwired Control implementation
Hardwired control units are designed as digital logic circuits.
They use decoders, counters, and combinational logic gates (AND, OR, NOT) to generate control signals based on the current instruction opcode and clock state.
The logic is "fixed" in the hardware and is very fast but difficult to modify.
Step 2: Compare with other options
• Options (A), (C), and (D) are characteristic of Microprogrammed Control.
• Microprograms are stored in a control ROM or memory.
• PLAs (Programmable Logic Arrays) can be used to store microcode in a condensed format.
• A Control Unit (CU) manages the flow of data through the CPU. There are two main types: Hardwired and Microprogrammed.
• Hardwired control is built using physical hardware components like logic gates.
• Microprogrammed control uses software-like code (microinstructions) stored in a control memory.
Step 1: Analyze Hardwired Control implementation
Hardwired control units are designed as digital logic circuits.
They use decoders, counters, and combinational logic gates (AND, OR, NOT) to generate control signals based on the current instruction opcode and clock state.
The logic is "fixed" in the hardware and is very fast but difficult to modify.
Step 2: Compare with other options
• Options (A), (C), and (D) are characteristic of Microprogrammed Control.
• Microprograms are stored in a control ROM or memory.
• PLAs (Programmable Logic Arrays) can be used to store microcode in a condensed format.
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