Literature: datasheets and application notes XD
Two tests
Embedded system is a system designed to perform or control a specific function in a larger design. It often comes with real-time computing constraints. It does not have to be based on the microcontroller or any digital logic - it may be simple thermostat controlling the fridge. Another example is a car - constructed of plenty of embedded systems cooperating together (window stall sensor, control buttons, lock controls and actuators).
Because Embedded System has defined functionality it can be heavily optimized in order to:
Because we use them more and more, they become cheaper causing the greater usage of them.
It consists of one of three types of processing units:
and some electronics.