How many addressing modes are there is 8051 microcontroller ?

The 8051 series microcontroller has how many 16-bit registers?

Choose the incorrect instruction

MOV A,R3 MOV A, 65H MOVX A, @R1 MOVP A, @R2

Which bit in PCON register is responsible for taking the microcontroller in ideal mode?

The value to be assigned to the TMOD register to operate Timer 1 in Mode 1 is ___________.

The instruction MOVC A, @A+DPTR accesses elements from which memory?

In the 8051 microcontroller, which I/O ports are used to provide the address for external memory?

#include <reg51.h>

void main(void)

{

P2 = 0;

P2 = P2 | 0X99;

P2 = ~P2;

}

What is the content in P2(in hexadecimal) after the execution of the above code?

How are the status of the carry (CY), auxiliary carry (AC), and parity (P) flags affected by the following instructions?

MOV A, #9C
ADD A, #64H

In 8051 microcontroller , in the multiplication of 2 numbers, if one number is present in the accumulator, then other number will be in