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WHere do we use 82C55?

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i.mehrzad

New Member
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??
 
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ronsimpson

Well-Known Member
Most Helpful Member
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

Super Moderator
Most Helpful Member
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

Well-Known Member
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

New Member
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.
 
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