I have a 4M-bit serial flash memory (25P40VNI) in a SOIC 8-pin case.
Anyone know how I could read it? I mean I know how to theoretically read it, but the problem is I don't have the tools to do so.
The chip was part of a USB flash drive, but casing and the PCB was destroyed by the perp.
Hi libertate
have you any friends in an electronics lab ?
here's a data sheet link
h t t p / /
kern
Just thinking out loud here, 'cos I'm interested -)
N.B. Don't know how you can make this forensically sound other than through a _lot_ of experimentation …
I can't find a specific data sheet for that particular reference (25P40VNI) but this one looks like the right sort of ballpark …
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Note Interestingly it has a write protect setting …
This site, in a round-about way reads data from a SOIC-8, but a completely different one …
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So similarly you may be able to connect to a serial port directly.
Alternatively, you could go to the efforts of trying to build a reader using something like a 8052 development board. Other people are using them as memory chips in projects …
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How about buying another device of the same type and swapping the chips out ?
Good Luck - please let me know your ultimate solution !
Thanks for the links! I have already contacted some friends in some electronics labs so they might be able to help.
Swapping out is a good idea, but cannot be sure. This is actually the memory chip from a "two-factor" USB token and the device has a "serial number safety". i.e. the memory chip is permanently linked to a serial number to an other onboard chip (MPU/CPU?).
The token acts as a USB flash drive, and as a one-time-password display device.
As for forensically sound, it is not going to be easy, I agree, but the destruction of the token by the perp was recorded on video when he realized we are coming. I LOVE video D.