Microcontroller

What is internal RAM memory of 8051 microcontroller?

• 32 bytes

• 64 bytes

• 128 bytes

• 256 bytes

8051 series has how many 16 bit registers?

• 2

• 1

• 3

• 0

Register that is used to hold the memory address of the next instruction to be executed is----------------

• Program Memory

• Program Counter

• Control Unit

• Instruction Decoder

Which register is used to store the output generated by ALU?

• Special Function Register

• Timer Register

• Accumulator

• Stack Pointer

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

• PSW

• SP

• DPTR

• PC

What kind of instructions usually affect the program counter?

• Push & Pop

• Call & Jump

• Call & Return

• Return & Jump

The 8051 microprocessor has ________ parallel I/O ports.

• 2

• 3

• 4

• 5

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

• 32 bytes

• 16 bytes

• 64 bytes

A microcontroller at-least should consist of:

• RAM, ROM, I/O ports and timers

• CPU, RAM, I/O ports and timers

• CPU, RAM, ROM, I/O ports and timers

• CPU, ROM, I/O ports and timers