WHere do we use 82C55?

[i.mehrzad]

I am having a slight doubt about where to use a 82C55??

I know we have to use it for keyboard interfacing, but we can avoid its use for LCD interfacing. Why is that??

So how do i know when exactly it is in use??

 

[blueroomelectronics]

I didn't know they still made the 82C55.

 

[ronsimpson]

The 82C55 is used when you need more I/O.
Often used for keyboards. Makes a good parallel printer port. It could be used for LCD interface.

 

[Nigel Goodwin]

The 82C55 is used when you need more I/O.
Often used for keyboards. Makes a good parallel printer port. It could be used for LCD interface.

I've always thought the 8255 was an absolutely terrible I/O chip, such a poor design and so very limited.

But this is the 21st Century, the 8255 is long dead and buried, you shouldn't be looking at such obselete, low spec, antiques.

 

[Mikebits]

Effective March 5, 1999, Intel announced the discontinuation of interactive peripheral component support. All interactive phone, email, and forum support for peripheral components was discontinued.

 

[mneary]

Intersil still manufactures and markets the 82C55A, probably for legacy system repairs and third world 'electronics' professors.

Discontinuing support isn't always a bad thing; from 1979 to 1999 all possible questions about the 8255A and 82C55A had been asked and answered. Since Intel no longer made the part, there would be no new bugs.

 

[shokjok]

The 8255 is also made by Toshiba and NEC ( D8255AC-5), and American Micro Devices ( AMD8255APC).