The signal that can only pull the 8051 microcontroller out of the power down mode is:

The final value in register A after the execution of the following code is:

CLR A

SETB C

RRC A

SETB C

RRC A

Which of the following operations are performed by single-bit instructions on individual bits?

What is the priority level of the serial interrupt (SI) interrupt in the 8051 microcontroller?

When a microcontroller pin is configured as an output, the maximum current that can be drawn from a single port pin is how many milliamps?

In the following code, how many times is the register R3 incremented?

MOV R0, #05H

MOV R3, #01H

AGAIN : MOV R1, #14H

REPEAT: INC R3

DJNZ R1, REPEAT

DJNZ R0, AGAIN

Which of the following is a status register ?

The incorrect statement among the following is:

What does the following code do?

ORG 0030H;

MOV R0, #40H;

MOV R7, @R0;

MOV A, 20H;

L1: INC R0

CJNE A, @R0, UP

MOV 50H, #0FFH;

SJMP L2;

UP: DJNZ R7, L1

MOV 50H, #00H;

L2: SJMP L2

END

What do you mean by subroutines , in context of a microcontroller ?