How much on-chip ROM does the 8051 microcontroller have?

Which of the following 8051 programming instructions is invalid?

After executing the following assembly instructions:

MOV A, #52H

SWAP A

The content in register A is,

Which is the concatenated register of the MC68HC11 microcontroller?

When does the microcontroller enter power-down mode?

#include<reg51.h>

void main()

{

P0 = 0X9A >> 3;

P1 = 0X9 << 4;

}

The output of the above code is,

Which of the following statement(s) about the 8051 microcontroller is/are true?

The data address of a look-up table is found by adding the contents of which registers?

1. 8051 does not have on-chip ADC.

2. In 8051, values can be directly moved to registers R0-R7.

3. MOV SP, #21H is not a valid instruction as address location 20-2F is reserved for bit addressable RAM.

4. When 8051 is powered up, the program counter(PC) has value 0000H in it.

Select the correct statements.

Which of the following statements about the CJNE instruction is false?