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 the output resistance of the circuit, Q. (a) Consider the ampl...

Q. (a) Consider the amplifier block in the circuit configuration of Figure. Find an expression for v 2 /v 1 in terms of R i , R o , and A of the amplifier. (b) Determine the

Ac-dc voltages , To do the basic laboratory experiments related to the elec...

To do the basic laboratory experiments related to the electrical engineering course, students need to have some basic understanding about the measuring tools, apparatus, components

Describe operation performed by instruction OUT47 h, Describe the operation...

Describe the operation performed by the instruction OUT 47 h, AL. This transfers the content of AL to I/O port 47h. See that I/O port number shows as 0047h on the 16 bit addres

Explain the limiting the spectrum, Explain the Limiting the Spectrum Th...

Explain the Limiting the Spectrum This low-pass filter is known an anti-aliasing filter. These filters are originated at the input to most applications. Since they are required

Motor, operation of induction motor

operation of induction motor

Filtering, Filtering  (i) Write an m-file "mymedian.m" which will ta...

Filtering  (i) Write an m-file "mymedian.m" which will take an image and filter size and perform median filtering. Display input and output image. Use  help median fun

Newtons law of gravitation, Particles of mass M and m separated in space by...

Particles of mass M and m separated in space by a distance R exert a mutually attractive gravitational force F on one another given by where G is the universal gravitationa

Speed control of stepper motor by using microcontroller 89c5, Hello sir, m ...

Hello sir, m engineering final year student, we made a project as I mentioned above, I wanna add some extra feature on it, meant to modified it...want to add up some extra feature

Write a note on the application of emitter-follower, Q. Write a note on the...

Q. Write a note on the application of emitter-follower? An emitter follower can serve as a buffer for a voltage source. The voltage divider at left is a poor voltage source bec

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