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LECTURE 5 Single-Cycle Datapathand Control

LECTURE 5 Single-Cycle Datapathand ControlPROCESSORSIn LECTURE 1, we reminded ourselves that the Datapathand controlare the two components that come together to be collectively known as the processor. Datapathconsists of the functional units of the processor. Elements that hold data. Program counter, register file, instruction memory, etc. Elements that operate on data. ALU, adders, etc. Buses for transferring data between elements. Control commands the datapathregarding when and how to route and operate on data. MIPSTo showcase the process of creating a Datapathand designing a Control , we will be using a subset of the MIPS instruction set.

The ALUperforms the operation indicated by the instruction. It takes two operands, as well as a 4-bit wide operation selectorvalue. The result of the operation is the output value. ­ALU operation is a part of the control. We discuss datapathfirst. We have an additional output specifically for branching – we will cover this in a minute.

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