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1. #Microcontroller 8051 basic interview questions pdf serial
2. #Microcontroller 8051 basic interview questions pdf software
3. #Microcontroller 8051 basic interview questions pdf tv

For a single bit to transmit, one line is used. It is a communication path over which electrical signals representing binary digits ( 0, 1) are transmitted. Bus: Group of lines connecting the microprocessor with other components of a computer system is called a bus. In some cases, memory is also considered as a peripheral.

Peripherals: The input or output devices that are connected to a microprocessor are called as peripherals. Program: Sequence of instructions that are written for the computer to perform a particular task is called as program. Group of one or more words forms an instruction. Instructions: A command formed using binary digits that are recognised and executedīy the computer to perform as task. Here the 4 bits are used for small microprocessors and 32 bits are used for large computers like IBM 370. Word: A group of bits that the computer recognises and processes at a time is called a word.The lenth of the word may varies from four bits to 32 bits. Also collection of two nibles is called a byte. Nible: Group of 4 bits is called a nible. Bit: The binary digits 0 and 1 are called bits.

#Microcontroller 8051 basic interview questions pdf software

Firmware: The software that is stored permanently in ROM, PROM or EPROM is called firmware. Collection of such programs is called software. Software: Set of instructions written for the computer to perform a task is called a program. Hardware : The physical components of the computer are called hardware. It has four component – microprocessor, memory unit, input and output devices.

Microcomputer: It is designed using microprocessor as its CPU. It has all the functions of Central Processing Unit (CPU), ie, ALU, Register arrays and control circuits of a computer. Various definitions used in microprocessor/microcontrollers: Microprocessor: A semiconductor device manufactured using the LSI or VLSI technology. It has one or more inputs and two complement outputs. RAM – Random Access Memory PROM – Programmable Read Only Memory EPROM – Erasable Programmable Read Only Memory EEROM – Electrically Erasable Programmable Read Only Memory What is meant by Flipflop? A Flip-flop is a basic electronic circuit used for storing information in a digital machine. What are the various types of memories used in microcontroller/microprocessor? ROM – Read Only Memory

#Microcontroller 8051 basic interview questions pdf serial

List out some of the features of the 8051? ROM – 4K bytes RAM – 128 bytes Timer – 2 no I/O Pins – 32 Serial Port – 1 Interrupt sources – 6 Whereas the microcontroller has a CPU in addition to a fixed amount of RAM,ROM, I/O ports and a timer all on a single chip. List some of the 8051 microcontroller manufacturers? Intel Philips Infineon Maxim/Dellas semiconductor Atmel What is difference between microprocessor and microcontroller? The microprocessor has no ROM, RAM and no I/O ports on the chip itself. Accumulator is an important register in 8051, because it saves all arithmetic and logical values. What is an Accumulator? Accumulator has another name called Register 'A'. It can hold a value of 1- byte memory space. What is meant by Register? Registers are temporary storage area in micro controller. After the interrupt, the control will transfer back to its previous address. What is an Interrupt service routine? When micro controller is under sudden interrupt, it will call ISR (Interrupt service routine) that will store the address of current memory address and takes the control to new interrupt memory address. Interrupt signals are generated by sources like software programs or hardware controls. Interrupts are external signal that controls the micro processor. What is an interrupt? Hardware or software can communicate to micro controller through interrupts.

#Microcontroller 8051 basic interview questions pdf tv

For instance, micro controller in TV remote is mainly designed for controlling TV. Micro controllers are designed for specific use. What is meant by micro controller? Microcontroller is a small chip that has in-build Micro processor, memory, ports, timers and converter. (3) Wide availability (4) Reliable sources/manufacturers (5) The amount of RAM and ROM on chip (6) The number of I/O pins and the timer on the chip (7) Power consumption (8) Speed of the device (9) Packaging (10) Cost per unit. Microcontroller Viva Questions and Answers What are the various criteria to choose the microcontroller? The important criteria to be considered in choosing micro controllers are: (1) Availability of software development tools like compilers, debuggers, assemblers (2) Meeting the computing needs of the task at hand efficiently at lowcost.