Questions and answers

What is MCS 51 architecture?

What is MCS 51 architecture?

The Intel MCS-51 (commonly termed 8051) is a single chip microcontroller (MCU) series developed by Intel in 1980 for use in embedded systems. The architect of the Intel MCS-51 instruction set was John H. Wharton.

What is 8051 assembly language?

The assembly language is a low-level programming language used to write program code in terms of mnemonics. It is also used to write the 8051 programming code efficiently with less number of clock cycles by consuming less memory compared to the other high-level languages.

Why 8051 is named so?

Brief History of 8051 In 1981, Intel introduced an 8-bit microcontroller called the 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.

What are the addressing methods of MCS 51?

There are 5 different ways to execute this instruction and hence we say, we have got 5 addressing modes for 8051. They are 1) Immediate addressing mode 2) Direct addressing mode 3) Register direct addressing mode 4) Register indirect addressing mode 5) Indexed addressing mode.

Which is the only register without internal on-chip RAM address in MCS 51?

ANSWER: (a) Push 13) Which is the only register without internal on-chip RAM address in MCS-51? ANSWER: (b) Program Counter 14) What kind of instructions usually affect the program counter? ANSWER: (a) Call & Jump Page 4 15) What is the default value of stack once after the system undergoes the reset condition?

How assembly language is created?

Because assembly depends on the machine code instructions, every assembly language is designed for exactly one specific computer architecture. Assembly language may also be called symbolic machine code. Assembly code is converted into executable machine code by a utility program referred to as an assembler.

Why is it called microcontroller?

It is so called because this device comprises of transistors which are small in size (micro-meter). The word micro is used in electronics and in science generally, to mean One-millionth or 10^-6. It has also used to denote something very small like a very small processor or micro controller.

Which is the only register without internal on chip RAM address in MCS 51?

Why is 8051 Famous?

The 8051 IP cores are free to use. The actual microcontrollers are incredibly cheap to buy. They are smaller and consume less power than 32 bit ARM cores. These are just some of the reasons why the 8051 is still popular.