Monolithic SD Inquery

[jeremyb]

I've seen two variations on this monolithic card, I can't make out any signals except data.. also logic is 1.2v

Has anyone seen these before? Am I missing something?

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[Sasha Sheremetov]

Hello Jeremy,

I think we have a very similar card, pinout was reverse engineered (will be added to the next Visual Nand Reconstructor update).
Nothing really special - SM2702 controller inside, ECC/XOR is typical, 8-bit chip, 1 crystal (CE).

[jeremyb]

Hello Jeremy,
I think we have a very similar card, pinout was reverse engineered (will be added to the next Visual Nand Reconstructor update).
Nothing really special - SM2702 controller inside, ECC/XOR is typical, 8-bit chip, 1 crystal (CE).

I suppose, maybe my logic analyzer (or me) was having a bad day, I couldn't make any sense of the log. Mine had two separate data buses but I suspect it is SM27xx as well..

[Sasha Sheremetov]

Possibly, what the capacity of your card?

[jeremyb]

Possibly, what the capacity of your card?

32GB

[Sasha Sheremetov]

We had just 8Gb (2C64444BA9), so your one may have 2xCE and two data buses (though it's still not very common).