module 2.1

Characteristics-of-embedded-systems-Part-1

repeatedly /continuously

All Embedded Systems are task specific. They do the same task _______________ over their lifetime.

MTBF

Mean Time Between Failures

characteristics of embedded systems

• They have minimal or no user interface (UI)

• cannot be changed or upgraded by the users

• are expected to function for long durations without the user experiencing any difficulties

• Microcontroller and microprocessors are used to design embedded systems

• need connected peripherals to attach input & output devices.

security and performance.

hardware of an embedded-system is used for

features.

Software of an embedded-system is used for

• Performance and Functional requirements

• Performance of the Microcontroller

Types of Embedded System

• real time

• stand alone

• networked

• mobile

based on performance and functional requirements

• small scale

• medium scale

• sophesticated

based on performance of the microcontroller

• Real Time Embedded Systems

• Stand-Alone Embedded Systems

• Networked Embedded Systems

• Mobile Embedded Systems

Embedded Systems can be classified into four types based on the performance and functional requirement.

Real Time Embedded Systems

provides output within a defined specific time. are designed and created to perform some specific work in pre-specified time.

• Soft Real Time Embedded Systems (telecommunications)

• Hard Real Time Embedded Systems (automotive and medical)

Types of Real Time Embedded Systems

Stand Alone Embedded Systems

are those that can work by themselves i.e. they are self-sufficient and do not depend on a host system. ______________________ are made in a way such that an input is received, processed and thereafter the desired output is produces. Input can be received via sensors, keyword or push button.

Networked Embedded Systems

depend on connected network to perform its assigned tasks. These systems consist of components like sensors, controllers etc. which are interconnected. Many of these systems are built on general purpose processors

Mobile Embedded Systems

are those that are small sized and can be used in smaller devices. They are used in mobile phones and digital cameras because of the small size. They often have memory constraints and lacks good user interface.

• Small Scale Embedded Systems

• Medium Scale Embedded Systems

• Sophisticated Embedded Systems

Microcontroller Performance Based Embedded System

Small Scale Embedded System

is normally designed and created using an 8-bit microcontroller. This microcontroller can be battery activated.

Medium Scale Embedded System

uses a single 16-bit or 32-bit microcontroller or multiple microcontrollers linked together. These systems have a lot of hardware as well as software complexities, hence are not preferred by many

Sophisticated Embedded System

______________________ often function on multiple algorithms that results in complexities in both hardware and software. They often need a processor that is configurable and logic array that can be programmed

Mean Time Between Failures

It is a metric used to estimate the reliability of a system or a component. _____ represents the average time that elapses between two consecutive failures of a system or a component during normal operation. ______ is often used in various industries, including engineering, manufacturing, and information technology, to assess the reliability and availability of systems. It is typically measured in units of time, such as hours, days, or years, depending on the application