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Chapter 7. Basic Processing Unit

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Chapter 7. Basic Processing unit Overview Instruction Set Processor (ISP) Central Processing unit (CPU) A typical computing task consists of a series of steps specified by a sequence of machine instructions that constitute a program. An instruction is executed by carrying out a sequence of more rudimentary operations. Some Fundamental Concepts Fundamental Concepts Processor fetches one instruction at a time and perform the operation specified. Instructions are fetched from successive memory locations until a branch or a jump instruction is encountered. Processor keeps track of the address of the memory location containing the next instruction to be fetched using Program Counter (PC).

Input and output gating for one register bit. D Q Q Clock 1 0 Riout Riin Bus Figure 7.3. Input and output gating for one register bit. Performing an Arithmetic or Logic Operation The ALU is a combinational circuit that has no ... unit is required to check the status of …

  Unit, Logic, Arithmetic

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