MICRO CONTROLLER

8051 MICRO CONTROLLER MADE BY THE FOLLOWING COMPANY/

• ATMEL

• PHILIPS

• SONY

• ATMEL & PHILIPS

8051 series has how many 16 bit registers?

• 4

• 2

• 1

• 3

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

• DPTR

• SP

• PC

• PSW

AT89C2051 has RAM of:

• 128BYTES

• 64BYTES

• 256BYTES

• 1024BYTES

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

• PSW

• PC

• SP

• DPTR

If we push data onto the stack then the stack pointer

• increases with every push

• decreases with every push

• increases & decreases with every push

• none of the mentioned

. On power up, the 8051 uses which RAM locations for register R0- R7

• 00-2F

• 00-07

• 00-7F

• 00-0F

. How many bytes of bit addressable memory is present in 8051 based microcontrollers?

• 8 BYTES

• 16BYTES

• 32 BYTES

• 64BYTES

Which architecture is followed by general purpose microprocessors

• Harvard architecture

• Von Neumann architecture

• None of the mentioned

• All of the mentioned

Which architecture provides separate buses for program and data memory?

• Harvard architecture

• Von Neumann architecture

• None of the mentioned

• All of the mentioned