8051 Architecture

What is the main function of the ALU in the 8051 architecture?

• Handle input/output operations

• Control the memory access

• Manage the clock speed

• Perform arithmetic and logical operations on data

How many bytes of on-chip RAM does the 8051 have?

• 128 bytes

• 256 bytes

• 512 bytes

• 64 bytes

Explain the role of the Port 0 in the 8051 architecture.

• Port 0 is a 16-bit unidirectional I/O port in the 8051 architecture.

• Port 0 is an 8-bit bidirectional I/O port in the 8051 architecture.

• Port 0 is used for memory addressing in the 8051 architecture.

• Port 0 is a read-only port in the 8051 architecture.

What is the function of the Timer in the 8051 architecture?

• Generate accurate time delays and count external events

• Control the memory access speed

• Execute arithmetic operations

• Handle input/output operations

How many interrupt sources are there in the 8051 architecture?

• 3

• 5

• 7

• 10

Describe the SFRs (Special Function Registers) in the 8051 architecture.

• SFRs in the 8051 architecture are memory-mapped registers used for I/O operations, timers/counters, serial communication, interrupt control, and other special functions.

• SFRs in the 8051 architecture are not accessible by the user.

• SFRs in the 8051 architecture are used for graphical processing.

• SFRs in the 8051 architecture are used for memory storage only.

What is the function of the Program Counter (PC) in the 8051 architecture?

• Manages the input/output operations

• Stores the result of arithmetic operations

• Controls the clock speed of the processor

• Holds the address of the next instruction to be executed

Explain the role of the B register in the 8051 architecture.

• B register is responsible for interrupt handling.

• B register is exclusively for input/output operations.

• The B register in the 8051 architecture is an 8-bit general-purpose register used for data manipulation and storage.

• The B register is used for program counter operations.

What is the function of the Serial I/O Control in the 8051 architecture?

• Manages the serial communication interface of the microcontroller.

• Controls the memory management unit

• Regulates the power supply voltage

• Handles the display output

How does the 8051 handle external memory access?

• Using a separate memory bus for external memory

• Direct memory access without any special handling

• Memory-mapped I/O using special function registers (SFRs)

• Accessing external memory through the accumulator register