8051 Microcontroller Concepts

What is the main function of the 8051 microcontroller?

• To bake cookies

• To predict the weather

• To control electronic devices and processes by executing stored instructions.

• To fly airplanes

Name the four main components of the 8051 architecture.

• ALU, Cache, Stack, Registers

• GPU, PSU, SSD, HDD

• Kernel, Compiler, Debugger, Interpreter

• CPU, RAM, ROM, I/O ports

How many bits wide is the data bus in the 8051 microcontroller?

• 8

• 32

• 4

• 16

Explain the role of the Program Counter (PC) in the 8051 architecture.

• The Program Counter (PC) in the 8051 architecture stores the data being processed.

• The Program Counter (PC) in the 8051 architecture controls the input/output operations.

• The Program Counter (PC) in the 8051 architecture manages the memory allocation.

• The Program Counter (PC) in the 8051 architecture holds the address of the next instruction to be executed.

What are the four addressing modes supported by the 8051 microcontroller?

• Stack

• Immediate, Direct, Indirect, Register

• Immediate

• Indexed

• Indirect

What are the different data types supported by the 8051 microcontroller?

• bit

• bit, byte, unsigned byte, signed byte, word, unsigned word, signed word, double word, float

• unsigned bit

• signed bit

• dword

What is the purpose of the MOV instruction in 8051 assembly language?

• To move data from one location to another

• To compare two values

• To multiply two numbers

• To add two numbers together

Explain the difference between direct and indirect addressing modes in the 8051 microcontroller.

• Direct addressing mode uses the actual memory address, while indirect addressing mode uses a register to point to the memory address.

• Direct addressing mode uses the actual memory address, while indirect addressing mode uses a constant value to point to the memory address.

• Direct addressing mode uses a register to point to the memory address, while indirect addressing mode uses another register to point to the memory address.

• Direct addressing mode uses a register to point to the memory address, while indirect addressing mode uses the actual memory address.

How many bits wide is the accumulator in the 8051 microcontroller?

• 16 bits

• 32 bits

• 4 bits

• 8 bits

What is the function of the A, B, and DPTR registers in the 8051 architecture?

• A register is for general purpose storage, B register is for multiplication and division operations, and DPTR register is for accessing external memory.

• A register is for division operations

• DPTR register is for arithmetic calculations

• B register is for general purpose storage