Discuss mode - 2 of programmable peripheral interface, Electrical Engineering

Assignment Help:

Discuss mode -2 (bi-directional mode) of 8255 (Programmable Peripheral Interface).

Only permitted with port A. Bi-directional bus data used for interfacing two computers and GPIB interface.

INTR: Interrupt request is outputs which requests and interrupt

1256_obf.png: output buffer is an output showing that the output buffer has data for the bi-directional bus.

844_ack.png: Acknowledge is an input and output which enables tri-state buffers that an otherwise in their high- impedence.

2474_stb.png: The strobe input load data in the port A latch.

IFB: Input buffer full is an output showing that the input latch has information for the eternal bi-directional bus.

INTE: Interrupt enable are internal bits which enable the INTR pin. Bit PC6(INTE1) and PC4(INTE2).

PC2,PC1: Such port C pins are general- purpose I/O pins which are PC0 obtainable for any reasons.


Related Discussions:- Discuss mode - 2 of programmable peripheral interface

Determine modulation index, Q. If the output signal fromanAMmodulator is gi...

Q. If the output signal fromanAMmodulator is given by u(t) = 5 cos 1800 πt + 20 cos 2000 πt + 5 cos 2200 πt , determine: (a) The modulating signal m(t) and carrier c(t). (b)

Distributed Control Sytems, 1. Produce a fully-labelled sketch to show the ...

1. Produce a fully-labelled sketch to show the components of a Direct Digital Control system. 2. State the minimum number of printed-circuit cards required to construct a basic co

Name the effects of electric current, Name the Effects of electric current ...

Name the Effects of electric current There are three Effects of electric current:- A) magnetic effect B) chemical effect C) heating effect

Rectifier, the forward resisitance of a semi conductor diode is 10 ohm, two...

the forward resisitance of a semi conductor diode is 10 ohm, two such diodes used in full wave rectifier subjectto a sinusoidal voltage wave form. given by v(t)=308 , sin(100 pi t)

Operation of a transistorized phase shift oscillator, Q. Discuss the operat...

Q. Discuss the operation of a transistorized phase shift oscillator with the help of a diagram? Explain the phase shifting circuit? An oscillator is a circuit which converts elec

Define the universal property of nand and nor gates, Define The universal p...

Define The universal property of NAND and NOR Gates? The NAND and NOR gates are called universal gates, because any gate can build by using these two gates. The univers

Energy, Explain different stage in energy audit?

Explain different stage in energy audit?

Microprocessor, Memory map of tpa in a personal computer and explain such o...

Memory map of tpa in a personal computer and explain such of the areas in brief

Dc machince, what ''s part of dcmotor or dc generator

what ''s part of dcmotor or dc generator

The resistance of an 8 m length of the same wire, The resistance of a 5 m l...

The resistance of a 5 m length of wire is 600Ω.Determine: a)  the resistance of an 8 m length of the same wire, b)  the length of the same wire when the resistance is 420Ω

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