MICROPROCESSOR AND MICROCONTROLLER

INTRODUCTION TO MICROPEOCESSOR

MICROPROCESSOR BASICS

Please wait while the activity loads.
If this activity does not load, try refreshing your browser. Also, this page requires javascript. Please visit using a browser with javascript enabled.

If loading fails, click here to try again

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Consider the system in which fetch cycle has been completed. Which of the following addressing modes does NOT require the memory access operation after the fetch cycle to get the operand?

A	register direct mode
B	register indirect mode
C	indexed mode
D	PC relative mode

Explanation:

Detailed explanation-1: -Register Direct Addressing Mode-The address field of the instruction refers to a CPU register that contains the operand. No reference to memory is required to fetch the operand.

Detailed explanation-2: -Register indirect addressing mode: The address field of the instruction refers to a CPU register that contains the effective address of the operand. Only one reference to memory is required to fetch the operand.

Detailed explanation-3: -The advantage of immediate addressing is that no memory reference other than the instruction fetch is required to obtain the operand, thus saving one memory or cache cycle in the instruction cycle.

Detailed explanation-4: -Direct Addressing Mode The effective address of the operand resides in the address field of the instruction. The operand resides in the memory, and the address field of the instruction gives its address.

There is 1 question to complete.