Microcontroller Questions and Answers – Introduction to Microcontroller

1. A microcontroller at-least consists of a processor as its CPU with RAM, ROM, I/O ports and timers. It may contain some additional peripherals like ADC, PWM, etc.
2.  Unlike microprocessors, microcontrollers make use of batteries because they have low power consumption.
3. fetch,decode,execute are the order decided by a processor or the CPU of a controller to execute an instruction.
4. If we say a microcontroller is 8-bit it means that it is capable of processing 8-bit data at a time. Data processing is the task of ALU and if ALU is able to process 8-bit data then the data bus should be 8-bit wide.
5. data bus, address bus, control bus they are presents in a controller for transferring data from one place to another.
6. .hex is the file extension that is loaded in a microcontroller for executing any instruction.
7. microcontrollers are not called general purpose computers because they design to perform dedicated task.

`{{-b\pm\sqrt{{b^2}-4ac}}\over{2a}}`

`\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}`

When `a \ne 0` , there are two solutions to `\(ax^2 + bx + c = 0\) `and they are
`x = \frac{-b \pm \sqrt{b^2-4ac}}{ 2a}.`