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 expanded memory system, What is expanded memory system? EMS: Th...

What is expanded memory system? EMS: The area at location C8000H-DFFFFFH is frequently open or free. Such area is used for the expanded memory system into a XT or PC system, or

Salient features of nep, Salient Features of NEP: Access to electrici...

Salient Features of NEP: Access to electricity: The policy not only envisages access to electricity for all but it also emphasizes in which all consumers, particularly t

Explain p - type semiconductor, Explain p - Type semiconductor. p - ...

Explain p - Type semiconductor. p - Type semiconductor:- (i) If small amount of trivalent impurity is added with to a pure semiconductor giving a large no. of holes in t

What are the different types of coupling in amplifiers, Q. What are the dif...

Q. What are the different types of coupling in amplifiers? The coupling between stages of amplifications may also be used to classify amplifiers. There are four main groups: di

Power system, a rectangular surge of 2us duration and magnitude of 100Kv tr...

a rectangular surge of 2us duration and magnitude of 100Kv travels along a line of surge impedance 500 ohms. The latter is connected to another line of equal impedance through an i

Sections construct in fortan, Q. Sections construct in FORTAN? The sect...

Q. Sections construct in FORTAN? The sections construct is a no iterative work sharing construct which causes structured blocks to be shared among threads in team. Every struct

Find the resonant frequency, Find the resonant frequency: Find the res...

Find the resonant frequency: Find the resonant frequency ω0 (or f0) for the given series RLC circuit v = Vm sin ωt = 50 sin ωt Figure Also determine the expre

Show that operating point does not depend on beta, Q. Prove mathematically ...

Q. Prove mathematically that the operating point does not depend on beta, in a potential divider bias circuit ? To determine the operating point, consider the input section of

Solve for amplitude and phase of the current and the voltage, Use PSpice to...

Use PSpice to solve for the amplitude and phase of the current and the voltage across the inductor in the circuit shown in Figure(a).

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