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

Analog circuit analysis, consider a single stage ce amplifier with rs=1kohm...

consider a single stage ce amplifier with rs=1kohm,r1=50ohm,r2=2kohm,rc=1kohm,rl=1.2kohm,hfe=50,hie=1.1kohm,hoe=25microamp/volt and hre=2.5*10-4

Data rates in pstns, Data rates in PSTNs: A voice channel in a PSTN is ...

Data rates in PSTNs: A voice channel in a PSTN is band limited with a nominal bandwidth of 3.1 kHz. A first-cut estimate of this can be attained from Nyquist's theorem that app

Determine the current in the exciting winding, Consider the magnetic circui...

Consider the magnetic circuit of Figure with an air gap, while neglecting leakage flux. Correct for fringing by adding the length of the air gap l g = 0.1 mm to each of the other

Alternater, if the prime mover input of an alternater connected directly t...

if the prime mover input of an alternater connected directly to an infinite bus in increased,then its?

Determine the electromagnetic force on the plunger, Q. Consider the electro...

Q. Consider the electromagnetic plunger shown in Figure. The λ-i relationship for the normal working range is experimentally found to be λ = Ki 2/3 /(x+t), where K is a constant. D

process of damping, Describe the process of DAMPING. You explanation shoul...

Describe the process of DAMPING. You explanation should include an example of each of the following:- Over-damping, Under-damping, Zero-damping, Critically da

ELECTRIC DRIVES, BLOCK DIAGRAM OF DIGITAL CONTROL OF ELECTRIC DRIVES

BLOCK DIAGRAM OF DIGITAL CONTROL OF ELECTRIC DRIVES

Demagnetizing and cross magnetizing effects , Q.   What do you understand b...

Q.   What do you understand by demagnetizing and cross magnetizing effects of armature reaction in a d.c. machine. Derive the expression for calculation of demagnetizing and cross

Explain working of liquid-crystal display, Q. Explain Working of Liquid-cry...

Q. Explain Working of Liquid-crystal display? This display needs only microwatts of power (over a thousand times less than a LED) and is used in such devices as electronic wris

Show the procedure of hex to decimal conversion, Q. Show the procedure of H...

Q. Show the procedure of Hex to Decimal Conversion? To convert from the Hex to the Decimal, multiply the value in each position by its hex weight and add each value. Using the

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