21. Micro-Programmed Control Unit
The chapter delves into the intricacies of micro-programmed control units, highlighting the significance of sequencing in generating control signals from memory locations. It elaborates on the fetch-execute cycle where instructions are processed through a series of micro instructions, governed by conditional branching based on status flags. The discussion encompasses micro-program memory architecture, addressing the role of the micro-program counter in the execution phases, along with the importance of designing control signals for effective instruction execution.
Enroll to start learning
You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- Micro-programming involves fetching, decoding, and executing instructions with control signals stored in memory.
- The micro-program counter (MPC) orchestrates the flow of micro instructions during the instruction execution process.
- Conditional branching is essential in micro-programs, allowing for dynamic instruction execution based on certain conditions.
Key Concepts
- -- MicroProgrammed Control Unit
- A control unit that uses a set of micro instructions stored in memory to generate control signals for executing instructions.
- -- MicroProgram Memory
- A specific memory area where control signals and corresponding micro instructions are stored for the execution of macro instructions.
- -- Instruction Fetch
- The initial step in executing an instruction where the relevant micro instructions for fetching the instruction are executed.
- -- Branch Instruction
- An instruction that alters the sequence of instruction execution based on certain conditions or status flags.
- -- MicroProgram Counter (MPC)
- A counter that points to the current micro instruction being executed in the micro-program memory.
- -- Control Signal Generation
- The process of creating signals that control various parts of the computer architecture during the execution of instructions.
Additional Learning Materials
Supplementary resources to enhance your learning experience.