Hello everyone,
I got some AT89C51RD2 chips that had their original bootloaders overwritten. Now I can't use FLIP to reprogram them.
AFAIK, now I need a parallel programmer to erase the chips and reflash the original bootloader.
So, I have two questions:
1) Where can I get the bootloader hex file for this specific chip?
2) Which parallel programmer should I use? I can build it if I can get the schematics.
Thank you all in advance!
Eduardo
That's what eBay, or such, are good for, you can find someone who already has a programmer, but needs devices for some legacy product/project.
The other reason build-your-own prom programmers disappeared is the cheapness of reasonably professional alternatives, and the fact the market for antiquated devices keeps shrinking.
Indeed, eBay is a good way to end this history if all else fails. Anyone interested can have all my 22 chips for $30.00 plus shipping.
I'm now waiting for a reply from Atmel's support. This is my last try. I want to confirm the correct procedure for a complete AT89C51RD2 erase. I can't find any document on the subject for this specific chip.