Computer Engineering Cheat Sheet

The core ideas of Computer Engineering distilled into a single, scannable reference — perfect for review or quick lookup.

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Quick Reference

Von Neumann Architecture

A computer architecture where a single memory stores both instructions and data, and a central processing unit fetches, decodes, and executes instructions sequentially. Most general-purpose computers still follow this model, extended with caches and pipelines.

Boolean Algebra and Logic Gates

Boolean algebra is the mathematical framework for binary logic. Logic gates (AND, OR, NOT, NAND, NOR, XOR) are the physical building blocks that implement Boolean functions in digital circuits using transistors.

Pipelining

A technique in processor design that overlaps the execution of multiple instructions by dividing the instruction cycle into discrete stages (fetch, decode, execute, memory access, write-back) so that a new instruction can begin before the previous one completes.

Cache Memory Hierarchy

A layered system of progressively larger and slower memory (L1, L2, L3 caches, main memory, storage) designed to exploit spatial and temporal locality so the processor can access frequently used data with minimal latency.

CMOS Technology

Complementary Metal-Oxide-Semiconductor (CMOS) is the dominant fabrication technology for integrated circuits. It uses complementary pairs of p-type and n-type MOSFETs to implement logic gates with very low static power consumption.

Instruction Set Architecture (ISA)

The ISA defines the interface between software and hardware, specifying the set of instructions a processor can execute, register organization, data types, addressing modes, and memory model. Major ISAs include x86, ARM, and RISC-V.

Embedded Systems

Dedicated computing systems designed to perform specific functions within larger mechanical or electrical systems, typically with real-time constraints, limited resources, and high reliability requirements.

Hardware Description Languages (HDLs)

Languages such as Verilog and VHDL used to model, simulate, and synthesize digital circuits. HDLs allow engineers to describe hardware behavior and structure at various levels of abstraction before fabrication.

Operating System Kernel

The core component of an operating system that manages hardware resources, schedules processes, handles interrupts, and provides abstractions (virtual memory, file systems) that application software relies upon.

Computer Networking and Protocols

The study of how computing devices communicate over wired and wireless links. Layered protocol stacks (such as TCP/IP) define rules for addressing, routing, error detection, and data delivery across interconnected networks.

Key Terms at a Glance

ALU:Arithmetic Logic Unit; the CPU component that performs arithmetic and bitwise logical operations.

ASIC:Application-Specific Integrated Circuit; a chip custom-designed for a particular task.

Boolean Algebra:A mathematical system for binary variables and logic operations (AND, OR, NOT), foundational to digital design.

Bus:A shared communication pathway that transfers data between components in a computer system.

Cache:A small, fast memory that stores copies of frequently accessed data to reduce average access time.

CISC:Complex Instruction Set Computing; an architecture with a large set of variable-length, multi-cycle instructions.

Clock Signal:A periodic electronic signal used to synchronize operations within a digital circuit.

CMOS:Complementary Metal-Oxide-Semiconductor; the dominant IC fabrication technology using paired PMOS and NMOS transistors.

CPU:Central Processing Unit; the primary component that executes instructions in a computer.

DMA:Direct Memory Access; a mechanism for peripherals to transfer data to or from memory without CPU involvement.

Embedded System:A dedicated computing system performing specific functions within a larger mechanical or electrical system.

Flip-Flop:A bistable circuit element that stores one bit of state, used as the basic building block of registers and sequential logic.

FPGA:Field-Programmable Gate Array; a reconfigurable IC with an array of programmable logic blocks and interconnects.

HDL:Hardware Description Language; a language (Verilog, VHDL) used to describe, simulate, and synthesize digital circuits.

Interrupt:A signal that causes the processor to pause current execution and handle a higher-priority event.

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