Architecture of 8051 microcontrollers

______ developed 8051 microcontroller

• Motorola

• Intel

• ATMEL

• AMD

8051 is a ------- bit microcontroller

• 4 bit

• 8 bit

• 16 bit

• 32 bit

What is the size of external program memory?

• 4 K byte

• 8 K byte

• 32 k byte

• 64 k byte

What is the size of internal program memory?

• 4K byte

• 8 K byte

• 128 Byte

• 64 K byte

What is size of internal data memory?

• 4 k byte

• 128 byte

• 64 k byte

• 128 K byte

How many I/O ports are there in 8051 microcontroller?

• 3

• 4

• 5

• 32

How many I/O port pins are there in 8051 microcontroller?

• 3

• 4

• 28

• 32

What is the size of onchip RAM in 8051 microcontroller?

• 4 K byte

• 128 byte

• 64 k byte

• 128 K byte

How many timers in 8051 microcontroller?

• 1

• 2

• 3

• 4

What is the size of timers in 8051 microcontrollers?

• 4 bit

• 8 bit

• 16 bit

• 32 bit