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

State diagram for a typical von neumann machine, Question: a) Give the ...

Question: a) Give the instruction cycle state diagram for a typical Von Neumann machine. b) Give two diagrams to differentiate between a Memory and CPU connections. c) Co

Power electronics, A step-down transformer has primary turns Np = 100; seco...

A step-down transformer has primary turns Np = 100; secondary turns Ns = 10; primary winding resistanceRp = 100 ?; secondary winding resistance Rs = 2 ?. Assume that there is no l

For parity flag - conditional jumps , For parity Flag  JPE ( jump on ...

For parity Flag  JPE ( jump on Parity even ) and  JPO  ( Jump or Parity Odd) Instruction JPE  transfer  the execution of the  program  to the specified memory  address i

What are the display devices, Q. What are the Display Devices? Display ...

Q. What are the Display Devices? Display devices can be categorized as on/off indicators, numeric, alphanumeric, or graphical displays. They may also be classified as active an

Phasor diagram, The aim of this question is to help you become familiar wit...

The aim of this question is to help you become familiar with phasor diagrams, and in particular to see how the diagram changes when one of the system parameters (in this case resis

Analog circuit, What is the disadvantages of diodes as a series element in ...

What is the disadvantages of diodes as a series element in a clipper?

Discuss about signal distortion in optical waveguides, Discuss about signal...

Discuss about signal distortion in optical waveguides Ans: The major reason for signal distortion within optical waveguide is dispersion. Dispersion of the transmitted

For parity flag - return instructions , For Parity Flag PRE ( Return ...

For Parity Flag PRE ( Return on Parity Even)  and RPO ( Return on Parity Odd) Instructions RPE returns from the  subroutine to the  calling  program if parity flag is not s

Explain imul instructions in 8086 family, Explain IMUL instructions in 80...

Explain IMUL instructions in 8086 family with example and their effect on flag. IMUL: It is an instruction for multiplication of two signed numbers. This result is a signed

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