Engineering Q&A
in Embedded System Design by

1 Answer

0 like 0 dislike

The main characteristics of an embedded system are:

1. Single functioned

2. Tightly constrained

3. Reactive and real time


1. Single functioned:

An embedded system usually executes a specific program repeatedly.

Ex. Pager is always a pager.

A desktop systems execute a variety of programs like spreadsheets, word processor and video games with new programs added frequently. One case is where an embedded systems program is updated with a Newer program version.

Ex. Some cell phones can be updated in such a newer program version.

A second case is where several programs are swaped in and out of a system due to size limitations.

Ex. Some missiles run one program while in cruise mode, then load a second program for locking onto a target.

2. Tightly constrained:

All computing systems have constraints on design metrices, but those on embedded systems can be specially tight.

Design metric is a measure of an implementations features such as cost, size, performance and power.

Embedded systems often must fast cost a few dollars, must be sized to fit on a single chip must perform fast enough to process data in real time, and must consume minimum power to extend battery life.

3. Reactive and real time:

Many embedded systems must continuously react to many changes in the system's environment and must compute certain results in real time without delay.

Ex. A cars cruise controller continuously monitors and reacts to speed and brake sensors. It must compute acceleration of the decceleration amounts repeatedly within a limited time. A Delay computation could result in a failure to maintain control of the car.

Desktop system typically focuses on computation with relatively in frequent reactions to input devices. In addition, a delay in those computations is inconvenient to the computer user. But it doesn't result in a system failure.

Ex. Digital camera chip

by
edited by

Related questions

1 answer
asked Jan 23, 2018 in Embedded System Design by anonymous1 | 83 views
0 answers
1 answer
1 answer
1 answer
0 answers
1 answer
0 answers
Welcome to electronics2electrical.com, where students and teachers can ask and answer any question. Get help and answers to any engineering problem including Electrical, electronics, mechanical, telecommunication, instrumentation, computer, mathematics, physics etc. Get answers to questions. Help is always 100% free!

Most popular tags

power motor dc circuit transformer voltage current system used phase resistance factor ac load synchronous induction energy electric generator electrical series frequency capacitor between plant line speed transmission use meter type advantages difference single mosfet control function instrument problem magnetic diode amplifier high bjt machine unit source motors and diagram winding shunt field parallel define electricity torque value maximum time relay types arduino supply digital armature applications thyristor working transformers wave on flow operation three coil material instruments state ratio signal emf effect formula efficiency theorem method disadvantages starting microprocessor network test operating direction controlled different logic transistor single-phase scr loss temperature connected rc law force inductance compare measure station wire low conductor principle wattmeter full characteristics measuring constant measurement breaker losses device converter bridge linear materials nuclear matrix flux drive resistivity of machines angle switch free rectifier protection core circuits battery solar gain thermal loop generators open negative analog number lines friction basic reactance short gate pole inverter the conservation diesel iron resistors capacitance engineering using direct main electronic electronics a steam induced relays hysteresis universal transducer computer feedback range distribution work secondary igbt algebra pmmc plants factors capacitors dielectric controller regulation systems design air fault components rotor cable starter oscillator eddy alternator application semiconductor ammeter rl average forces damping rlc connection zener electromagnetic biasing minimum insulation pressure balanced permanent moving errors running copper self analysis impedance stability quality start ideal curve over commutation is 3-phase arc permeability peak bias error fuzzy commutator conductors superposition density mechanical rotation construction measured electrons charge memory inductive two transfer explain fuse methods off back three-phase tariff locomotive installation welding heating rms surge rating generation potentiometer coupled shaded rate capacity storage adc excitation active pure resistor harmonics reluctance microcontroller voltmeter inductor internal 8085 cro reaction insulating overhead hydro resonance traction definition breakers earth

9,199 questions

7,946 answers

157 comments

3,292 users

9,199 questions
7,946 answers
157 comments
3,292 users