adplus-dvertising
frame-decoration

Question

Why MOVX instruction is being used to access the ports of the 8255?

a.

because 8255 is used to access the memory mapped I/O

b.

because 8255 is used to access the external communication

c.

because 8255 is used to access the data transfer

d.

because 8255 is used to access the interfacing of LCD, motor etc.

Posted under 8051 Microcontroller Computer Architecture

Answer: (a).because 8255 is used to access the memory mapped I/O

Engage with the Community - Add Your Comment

Confused About the Answer? Ask for Details Here.

Know the Explanation? Add it Here.

Q. Why MOVX instruction is being used to access the ports of the 8255?
Add Comment

Similar Questions

Discover Related MCQs

Q. What is correct about the BSR mode from below?

View solution

Q. How many pins of the 8255 can be used as the I/O ports?

View solution

Q. DS12887 is a

View solution

Q. What is the RAM space that a DS12887 have?

View solution

Q. How many bytes of the ROM are there for the general purpose applications?

View solution

Q. Which bits of the Register A are used for turning on the oscillator?

View solution

Q. Which out of the following is correct about the SQW pin?

View solution

Q. What is correct about the UIP pin of the register A?

View solution

Q. What is the byte address where time, calendar, alarm address locations etc are kept?

View solution

Q. Are the RAM locations of the DS12887 non volatile?

View solution

Q. Name the read only registers are present in the DS12887?

View solution

Q. What is the supply that a DS12887 consumes even when the power is switched off?

View solution

Q. What is the principle on which electromagnetic relays operate?

View solution

Q. What are DPDT relays?

View solution

Q. Why do we need a ULN2803 in driving a relay?

View solution

Q. Why are solid relays advantageous over electromagnetic relays?

View solution

Q. What are optoisolators?

View solution

Q. How can we control the speed of a stepper motor?

View solution

Q. Which of the following can be a unit for torque?

View solution

Q. The RPM rating given for the DC motor is for?

View solution
View All MCQs on 8051 Microcontroller

Suggested Topics

Are you eager to expand your knowledge beyond Computer Architecture? We've curated a selection of related categories that you might find intriguing.

Click on the categories below to discover a wealth of MCQs and enrich your understanding of Computer Science. Happy exploring!

Digital Communication

Master the basics of electronic communication with our Digital Communication MCQs....

Web Technologies

Master the building blocks of the web with our Web Technologies MCQs. From HTML and...

MS Office

Master the suite of productivity tools with our MS Office MCQs. From Word and Excel...

PHP

Venture into server-side scripting with our PHP MCQs. Cover everything from syntax...

MySQL Database

Enhance your knowledge of relational databases with our MySQL MCQs. Understand...

C# programming

Hone your skills in the C# language with our MCQs. Understand data types, operators,...

Computer Hardware

Explore the tangible components of computers with our Computer Hardware MCQs. Learn...

Formal Languages and Automata Theory

Discover the mathematical models of computation with our Formal Languages and...

Data Structures and Algorithms

Journey through the fundamentals of Data Structures and Algorithms with our extensive...