How is 8255 (programmable peripheral interface) configured, Electrical Engineering

Assignment Help:

How is 8255 (Programmable Peripheral Interface) configured if its control register contains 9B h.

Ans.

1669_Programmable Peripheral Interface.png

Programmable Peripheral Interface

Command Byte B (sets or resets any bits in port C)

1196_control register.png

BH => 1001 1011 =>

6b5=00-> Mode0

4=0-> Port A as input

3=1-> Port C as input (PC7-PC4)

2=0-> Mode 0

1=1-> Port B as input

0=1-> Port C as input (PC3-PC0).


Related Discussions:- How is 8255 (programmable peripheral interface) configured

What is meant by interrupt, What is meant by interrupt? Interrupt is an...

What is meant by interrupt? Interrupt is an external signal that causes a microprocessor to jump to a particular subroutine.

2365 - 305 task a, List four sources of information which are essential to ...

List four sources of information which are essential to the designer of this electrical installation.

Digital frequency meter, Q. Explain digital frequency meter. or E...

Q. Explain digital frequency meter. or Explain principle of digital frequency meter and discuss utility of time base selector with suitable diagrams. Sol. Digital Fr

NDT-EDDY CURRENT CRACK DETECTOR PROBE, I am assigned to make above mentione...

I am assigned to make above mentioned thing...Know the theory but need an authentic circuit diagram(simple).It must contain a solenoid and other simple objects

Which realization requires the least number of gates, Q. Consider a 1-bit v...

Q. Consider a 1-bit version of the digital comparator shown in Figure. Note that the operation of this circuit is such that whichever output is 1 gives the desired magnitude compar

Armature reaction, is armature reaction good or bad for dc generator?

is armature reaction good or bad for dc generator?

Karnaugh map, how can be a karnaugh map of the count of sequence: 0-5-6-9-1...

how can be a karnaugh map of the count of sequence: 0-5-6-9-11-14

What is an oscillator and show the advantages of oscillators, Q. What is an...

Q. What is an oscillator? Discuss the advantages of Oscillators ? An oscillator is a system consisting of active and passive circuit elements to produce a sinusoidal or other r

Explain about the chrominance signal, a. Determine how color sync burst and...

a. Determine how color sync burst and H deflection sync vary in amplitude and frequency. Also explain the difference in timing among the 3.58 MHz color sync burst and 3.58 MHz chro

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd