Friday, September 30, 2016

Embedded System Glossary – H

Embedded System Terminology - H

Half Duplex - An I/O communications scheme in which a data stream can be transmitted and received in either direction, but in only one direction at any one time.
Handshaking - The process in which protocols are adhered to by components on a board or devices over a network that want to initiate and/or terminate communication.
Hard Real Time - Describes a situation in which timing deadlines are always met.
Hardware - All of the physical components of an embedded system.
Harvard Architecture - A variation of the von Neumann model of computer systems, which differs from von Neumann in that it defines separate memory spaces for data and instructions.
Heap - A portion of memory used by software for dynamic allocation of memory space.
Heat Sink - A component on a board that extracts and dissipates heat generated by other board components.
Henry - The unit of measurement for inductance.
Hertz - The unit of measurement for frequency in terms of cycles per second.
High-Level Language - A programming language that is semantically further away from machine language, more resembles human language, and is typically independent of the hardware.
Hit Rate - A cache memory term indicating how often desired data is located in cache relative to the total number of times cache is searched for data.
Host - The computer system used by embedded developers to design and develop embedded software; it can be connected to the embedded device and/or other intermediary devices for downloading and debugging the embedded system.
Hysteresis - The amount of delay in a device’s response to some change in input.

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Related topics:
Embedded System Architecture   |   Embedded Hardware Architecture   |   Embedded Software Architecture   |   Embedded Software Definition   |   Embedded System Acronyms   |   Embedded System Symbols

List of topics: Embedded System

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