What will be the final value in the accumulator ?

MOV R1, #22H MOV A, #55H XCHD A, R1

The 8255 is a ______ chip.

Which memory is being reffered to here? MOVX A, @R1

Based on the range of jumps, how many jumps instructions are therein the instruction set of 8051 microcontroller ?

Which of the following 8051 assembly instructions will result in an error?

The group of memory location set aside to hold the address of the ISR is called ?

What are the applications of an SR latch?

Which type of microcontrollers are widely used in a variety of applications?

Which of the following statements about assembly-level language is/are true?

The SCON register in the 8051 microcontroller has the data 00000010 then which of the following is true ?