8051 Quiz

Full form of PSW

• program status word

• program search word

• pointer search word

• pointer status word

No. of pins in 8051

• 40

• 20

• 30

• 50

Which of the following are 16 bit Registers

• DPTR

• PC

• A

• B

Internal ROM memory IN 8051

• 4kB

• 128 bytes

• 64kB

• 32 bytes

Internal RAM memory IN 8051

• 4kB

• 128 bytes

• 64kB

• 32 bytes

There are ..............Register banks in RAM, each of ................bytes

• 4, 8

• 8,4

• 32,128

• 128,32

Scratch pad memory in RAM is from ...............to .......................

• 30H to 7FH

• 40H to 7FH

• 00H to 7FH

• 00H to 2FH

Which instruction is used for jump if bit is set

• JB

• JC

• JNC

• JNZ

which instruction is used for Complement

• CPL

• CML

• CMT

Copy the value in address 20h to accumulator

• MOV A,#20H

• MOV #20H,A

• MOV A,20H

• MOV 20H, A