How 8255 programmable peripheral interface can operate, Electrical Engineering

Assignment Help:

What are the different modes in which 8255 Programmable Peripheral Interface (PPI) can operate?

  • Twenty Four I/O lines in 38-bit port groups - A, B and C
  • A and B can be 8-bit input/output ports
  • C can serve as twenty four-bit input /output ports
  • 3 modes of operation:

- Mode 0: A, B, C simple input / output level sensitive ports

- Mode 1: A, B input / output ports along with strobe control in C

- Mode 2: A is bidirectional along with control/handshake in B and C

  • A, B can only modify 1 byte at a time
  • C has individual bit set/reset ability
  • Improvement is non-dedicated circuit can change port configuration along with software and no "glue logic"
  • Ports A, B and C are utilized for I/O data.
  • The control register is programmed to choose the operation mode of the three ports A, B and C.
  • Mode 0: simple I/O mode
  • Any of the ports A, B, CL and CU can be programmed as input / output.
  • No control of individual bits (all bits are out or in

Related Discussions:- How 8255 programmable peripheral interface can operate

P-n junction, P-N Junction   A p-n junction is made by joining P-ty...

P-N Junction   A p-n junction is made by joining P-type and N-type semiconductors together in extremely close contact. The word junction consider to the boundary interface

#title. electronic project for invention, I need assistance in building a c...

I need assistance in building a circuit for my invention ,I am a electronic tech with limited knowledge but designing and building a proto model is a little out of my expertise ce

What can explain failure of relative ppp to hold in reality, Q. What ...

Q. What can explain the failure of relative PPP to hold in reality? Answer: Government procedures of the price level differ from country to country. One cause for thes

Wye -delta conversion, how to write theory background on practical about t...

how to write theory background on practical about this topic.

Block diagram convert into Electrical Circuit, i have block diagram and i n...

i have block diagram and i need to convert it into Electrical circuit and on electrical circuit need to apply state space method.

Network theorems, what is the limitations of maximum power transfer thorem ...

what is the limitations of maximum power transfer thorem ?

Components of plc - stepper motor , Components of PLC There are follow...

Components of PLC There are followings  three main  components of PLC : a.The power supply and rack. b.The central  processing  unit ( CPU) c.The input / output  (I/O

Dc link scherbius drive - motor control , DC Link Scherbius Drive This ...

DC Link Scherbius Drive This type of scheme is shown in figure. This circuit  allows both  sub synchronous  and super synchronous speed control. In case  of sub synchronous spe

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