microcontroller 8051 basic interview questions pdf

The program and data memory are connected externally separately. Which of the microcontroller's pins are most useful, along with their functions?ĪLE: As Harvard architecture is the foundation of the 8051. Microcontrollers are utilized in washing machines, cameras, and mobile phones. Devices for controlling and sensing light employ microcontrollers. The voltmeter, ammeter, hand-held metering system, and measuring rotating objects all employ microcontrollers. Mention a few applications of a microcontroller? Digital analog converters, analog to digital converters, serial interface ports, and oscillatory circuitsģ.Generally speaking, a microcontroller includes one or more of the following: What are the main components of a microcontroller? The timer is used to measure internal clock cycles, whereas the counter counts external events. How are timers and counters different in a microcontroller? 8051 may also have a number of special features such as UARTs, ADC, Op-amp, etc.Top Microcontroller Interview Questions and Answers for 2022 1.16-bit program counter and data pointer.Four 8-bit ports,(short model have two 8-bit ports).

Three internal and two external Interrupts.

16 bit Timers (usually 2, but may have more or less).

32 general purpose registers each of 8-bit.

FeatureĪn 8051 microcontroller comes bundled with the following features − The following table compares the features available in 8051, 8052, and 8031.

To solve this problem, we can add an external I/O to the 8031 But in the process of adding external ROM to the 8031, it lost 2 ports out of 4 ports. This program can be as large as 64K bytes. You must add external ROM to it in order to use it, which contains the program to be fetched and executed. This chip is often referred to as a ROM-less 8051, since it has 0K byte of on-chip ROM. It also has 8K bytes of on-chip program ROM instead of 4K bytes.Ĩ031 microcontroller − It is another member of the 8051 family.

8051 Flavors / MembersĨ052 microcontroller − 8052 has all the standard features of the 8051 microcontroller as well as an extra 128 bytes of RAM and an extra timer. This has led to several versions with different speeds and amounts of on-chip RAM. It means that if you write your program for one flavor of 8051, it will run on other flavors too, regardless of the manufacturer. When it became widely popular, Intel allowed other manufacturers to make and market different flavors of 8051 with its code compatible with 8051. It was referred as system on a chip because it had 128 bytes of RAM, 4K byte of on-chip ROM, two timers, one serial port, and 4 ports (8-bit wide), all on a single chip. In 1981, Intel introduced an 8-bit microcontroller called the 8051. 80 microprocessors were also invented by Intel. The first microprocessor 4004 was invented by Intel Corporation.

Microcontroller 8051 basic interview questions pdf