quizz3

The 8051 microcontroller is of ___pin package as a ______ processor

• 30, 1byte

• 20, 1 byte

• 40, 8 bit

• 40, 8 byte

After reset, SP register is initialized to address

• 8H

• 9H

• 7H

• 6H

What is the address range of SFR Register bank?

• 00H-77H

• 40H-80H

• 80H-7FH

• 80H-FFH

Which of the following is of bit operations?

i) SP ii) P2 iii) TMOD iv) SBUF v) IP

• ii, v only

• ii, iv, v only

• i, v only

• iii, ii only

In 8051 which interrupt has highest priority?

• IE1

• TF0

• IE0

• TF1

8051 microcontrollers are manufactured by which of the following companies?

• Atmel

• Philips

• Intel

• All of the mentioned

AT89C2051 has RAM of:

• 128 bytes

• 256 bytes

• 64 bytes

• 512 bytes

8051 series has how many 16 bit registers?

• 2

• 3

• 1

• 0

When 8051 wakes up then 0x00 is loaded to which register?

• PSW

• SP

• PC

• None of the mentioned

When the microcontroller executes some arithmetic operations, then the flag bits of which register are affected?

• PSW

• SP

• DPTR

• PC