8085 I/O Interfacing MCQs

Practice 8085 I/O Interfacing MCQs with four options, answers and explanations for focused Electronics & Telecommunication Engineering revision.

Question 1

Microprocessors & Microcontrollers8085 I/O Interfacing

The 8085 has separate IN and OUT instructions with an 8-bit port address, allowing how many directly selectable I/O port addresses in isolated I/O space?

Show AnswerHide Answer Report an error

Correct Answer: C. 256

Explanation: An 8-bit I/O port address provides 2^8=256 possible port addresses for isolated I/O operations.

Reference: Standard microprocessors and microcontrollers: 8085 i/o interfacing

Question 2

Microprocessors & Microcontrollers8085 I/O Interfacing

Show AnswerHide Answer Report an error

Correct Answer: A. The memory address space and memory-type instructions

Explanation: Memory-mapped I/O assigns peripheral registers addresses in the memory space, allowing memory-reference instructions to access them.

Reference: Standard microprocessors and microcontrollers: 8085 i/o interfacing