[Tiersten]

Originally Posted by dagero

Cool, I began investigating this because I wanted an SD-card slot in my kindle. Given that the iNAND is just SD-interfaced data storage chip, the SD-card slot could probably replace the chip.

Its MMC or SD. No idea what specific MMC interface type it is using. No idea what speed it is using either. If it is one of the fast variants of eMMC then you'll need to find a card that supports the same speeds.

You wouldn't be able to format the MMC card as normal. It'd have to replicate the partitions on the internal flash precisely and it won't support hotswap. Each of your MMC cards would need to have the firmware loaded and the data from your specific Kindle as well which would include the crypto keys and IDs.

I have no idea if there is a chip specific ID and whether it is used for the Kindle BTW. If there is then it won't be possible to change the flash at all not without losing the ability to use Kindle store items.

Originally Posted by dagero

Is it necessary to have a write-distribution system in between the processor and the SD-card to level the wear on the SD-card, or is the wear-leveling built into the processor or the SD-card itself?

The chip does it as part of the MMC controller built into it.

Originally Posted by dagero

I don't know if the SanDisk iNAND chip is pin-compatible with the Samsung chip you all seem to have.

It will be the same.

Originally Posted by dagero

If I manage to do it, I'll document every step of it. Source code modifications will also be released. Please do the same.

You have the necessary SMD rework equipment to get the existing chip off? You know its a BGA with the package overhanging everything right? Have to ask just in case you don't.

There are lots of unknowns in your project and removing that chip isn't going to be easy without the correct tools. Attempting it without the correct tools or knowledge is just going to mean you're guaranteed dead Kindle. If you do it and it works then lots of pictures and a list of changes