JP1 Remotes

Thank you guys for all your helps. I don't speak German so I could leave the BettyHacks forum. For the Harmony, it sounds good... until I find this:

http://www.techdesign.be/projects/011/011.htm



vda

This is the part that I'm really having a hard time understanding. We've got over 10,000 members here, most of whom understand the documentation and get up and running with JP1 without even asking any questions, yet you say that you would need to read the source code to understand it because the ...

What you guys are saying is very interesting and convincing, but let me approach from a different angle:

The scrambler and all the efforts to protect the code library is possibly addressed to companies/rivals and not to hobbyists. If company A wants to stole the code library from company B's ...

The "data area" is separate from the main MCU, it's an EEPROM in the older remotes and it's a special area of the flash, set aside just for this purpose, in the newer remotes. The remotes were specifically programmed by UEI to allow data to be read from and written to these areas.

When I said ROM ...

To unclemiltie:

The Samsung S3F80 is essentially the same thing but with a built-in flash system instead of ROM. This is programmed with the code, etc at the factory with some kind of access directly to the chip. No one has really figured this out yet.

Thank you, that is the answer I was looking ...

It sounds reasonable from user's point of view, but from manufacturer's point, it doesn't.

It would mean that for every single remote control model, the manufacturer would have to create a new chip design (because the "how" transistors are connected together on a piece of silicon represents the ...

I have searched the forum and seen a lot of post saying it is not possible to extract the entire contents of a ROM - from a remote control, certainly - but none of them said why. Can anybody give some explanation, please?

The remote did remember the settings without battery for 3 days, but when I shorted the capacitor's terminals, it got reset.

So Rob, you are right. This one has no flash inside and it is not worth dealing with it.

Thanks for your help on this one.

vda

Well, I could be wrong, but I think the big chip actually has some flash memory inside (otherwise how could it remember the settings?). I would like to believe that the S3C8 datasheet is the datasheet of that "big chip" - 3C80F9XLN-SOB7 written on it - but even if that is true, according to the ...

Thanks Rob, I have seen them all, but they didn't help. Mine is a version without JP1 connector, so I wonder finding the version with JP1 connector to see if I can make a missing parts, although in one of your post you said you have soldered the missing parts but it didn't work. However you were not ...

Hi All,

I have a One For All URC-7740 that does not have a JP1 connector at all, but on the plastic case there is a place for it, so I thought it might be a JP1 compatible remote control. After opened up the casing, I found a single chip with the following written on it:

N434
3C80F9XLN-SOB7
(c ...