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Lecture 1: Course introduction - page 8 / 15

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D0

IR

CONTROL UNIT

D7 A0

PC

ALU

SR/CCR

A7

MDR

MAR

Central Processing Unit

Arithmetic-Logic Unit (ALU)

Performs the operations required by the CPU

Control Unit

Determines the operation to be performed by an instruction

Sets in motion necessary actions to perform the operation

Registers Data/Address Registers Instruction Register Program Counter Status Register Memory Data/Address Registers

Data bus

Address bus

Microprocessor-based System Design Ricardo Gutierrez-Osuna Wright State University

8

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