ECE 09241 Lecture Notes - Combinational Logic, Datapath, Programmable Read-Only Memory

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garrettlaraus03

12 May 2022

School

Rowan University

Department

Electrical and Computer Engineering

Course

ECE 09241

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Document Summary

Intro to digital systems course notes: lecture 13 & 14. A designer commonly wants to clear a register, meaning to load 0"s. Registers commonly come with a control input named "clear" or "clr". A register with clear and load control inputs can be implemented using 4x1 muxes. A register with multiple functions, like clear and load, is called a multi-function register. A shift register shifts contents by one position, shifting in a new bit too. Ex: a 4-bit right-shift register holding 1100 becomes 0110 after the shift, assuming the shifted-in bit is 0; the rightmost bit (0) is discarded. A register can have various combinations of functions, such as load, clear, and increment. Some simple combinational logic can convert the control signals to mux select lines. An alu is a datapath component capable of performing various arithmetic and logic functions, like add, subtract, and and. Alu rather than multiple components trades off reduced size for increased delay.

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11. Which part of the CPU performs arithmetical, logical, and bit manipulation operations? a) Registers b) ALU X c) Program Counter d) Cache memory e) All of the above

ECE 09241 Lecture Notes - Combinational Logic, Datapath, Programmable Read-Only Memory

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