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Subject: Re: Are there any IC's similar to Intel's 8255 still in production?

Date: 07/07/02 at 10:06 AM
Posted by: Ray
E-mail: rrogers@plaidheron.com
Message Posted:

In Reply to: Are there any IC's similar to Intel's 8255 still in production? posted by Alfonso Baz on 07/06/02 at 10:08 PM:

No direct help here, but have you tried
www.chipcenter.com
IC Index, Peripheral Controllers ?
If none of these are good enough then try using a FPGA. Probably quite a bit more expensive ($1-$10) but flexable and, if programed with a standard, portable.
Having been a doubter about language design entry that learned better; if you do a FPGA program it with a standard high level language, Verilog or some such. If you do schematic entry it typically isn't portable and has problems in "maintence". I used to think that languages like Verilog was for wimps ( or 1M arrays of gates)who didn't know electronics. Then I got to see a complicated design implemented (J1850 interface for PC's) and watched as the design became progressively more "delicate" with each modification. In addition the learning curve was long and grew longer.
I have done a lot of digital designs with schematics and they worked fine; but upon reflection I realize that they were into markets where the design was fixed and could be finalized. Portability, upgrading and maintence were not goals.
I still detest the moving of EE design to "programing" and think there are alternatives; it's just that the alternatives are underdevloped (and maybe unknown).
There is a "State Space" compiler from a company in FL. We had some problems with the J1850 controller, but that was years ago and I think they have cleared up the problems by now.

Ray


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