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

EEI., explain about heat time curve and cool time curve

explain about heat time curve and cool time curve

Write explanatory notes on paging, Write explanatory notes on Paging. T...

Write explanatory notes on Paging. The memory paging mechanism located inside the 80386 and above permits any physical memory location to be allocated to any linear address. Th

Develop and execute a p spice program, Q. In the circuit shown in Figure th...

Q. In the circuit shown in Figure the switch opens at t = 0. Develop and execute a P Spice program to solve for v(t), and use PROBE to obtain a plot of v(t). Hint: Use the follo

FET, WHAT IS FET

WHAT IS FET

Doping, expalin process of doping how to do doping

expalin process of doping how to do doping

Fourier deconstruction, Find the Fourier series as far as the third harmoni...

Find the Fourier series as far as the third harmonic, to represent the periodic function y, given by the values in the following table. x 0 o 30

Digital frequency meter, Q. Explain digital frequency meter. or E...

Q. Explain digital frequency meter. or Explain principle of digital frequency meter and discuss utility of time base selector with suitable diagrams. Sol. Digital Fr

Define the software defined radio, Software Defined Radio (SDR) is an advan...

Software Defined Radio (SDR) is an advanced radio technology in which flexibility is achieved in using radio functions such as modulation and demodulation of radio signals are carr

Determine the current and voltage in given network, Q. For a part of the ne...

Q. For a part of the network shown in Figure, given that i 1 = 4A; i 3 (t) = 5e -t , and i 4 (t) = 10 cos 2t, find v 1 , v 2 , v 3 , v 4 , i 2 , and i 5 .

Determine the air-gap flux density, Q. A four-pole dc generator is lap woun...

Q. A four-pole dc generator is lap wound with 326 armature conductors. It runs at 650 r/min on full load, with an induced voltage of 252 V. If the bore of themachine is 42 cmin dia

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