MPC quiz

MOV A, #56H

MOV R1, #50H

MOV 50H, # 45H

XCHD A, @R1

What is the result at A, R1?

• 56H, 45H

• 45H, 50H

• 50H, 56H

• 45H, 56H

MOV 45, #4FH

MOV R0, 45H

INC R0

MOV @R0, #30H

What is the location value of R0 and the content at that place?

• 45H, 4F

• 50H, 30H

• 30H, 50H

• 50H, 45H

What is the Address (SFR) for TCON, SCON, SBUF, PCON and PSW respectively?

• 88H, 98H, 99H, 87H, 0D0H

• 98H, 99H, 87H, 88H, 0D0H

• 0D0H, 87H, 88H, 99H, 98H

• 87H, 88H, 0D0H, 98H, 99H

Why is the speed accessibility of external data memory slower than internal on-chip RAM?

• Due to multiplexing of lower order byte of address-data bus

• Due to multiplexing of higher order byte of address-data bus

• Due to demultiplexing of lower order byte of address-data bus

• Due to demultiplexing of higher order byte of address-data bus

Which general purpose register holds eight bit divisor and store the remainder especially after the execution of division operation?

• Register

• B-Register

• Registers R0 through R7

• All of the above