20EE431 Microprocessors and Microcontrollers

8085 microprocessor is an 8-bit microprocessor designed by

• IBM

• Dell

• Intel

• VAX

In 8085, 16-bit address bus, which can address upto?

• 16KB

• 32KB

• 64KB

• 128KB

It is also a 16-bit register works like stack, which is always incremented/decremented by 2 during push & pop operations.

• Stack pointer

• Temporary register

• Flag register

• Program counter

Flag register is an 8-bit register having __________ 1-bit flip-flops

• 3

• 4

• 6

• 5

MVI B, 20H is an example of?

• Immediate addressing mode

• Register addressing mode

• Direct addressing mode

• Indirect addressing mode

Register pair used to indicate memory

• B and C

• D and E

• H and L

• W and Z

In a Microprocessor, the address of the new next instruction to be executed is stored in

• Stack pointer

• Address latch

• Program Counter

• General Purpose Register

The number of output pins of a 8085 microprocessor are

• 40

• 20

• 48

• 42

Following is a 16-bit register for 8085 microprocessor

• Stack pointer

• Accumulator

• B Register

• C Register

The register which holds the information about the nature of results of arithmetic of logic operations is called as

• Accumulator

• Instruction Register

• Flag register

• Temp Register