RCWD21
Member
I've posted about my issues with nand chips several times now but since then I've been able to get things working great EXCEPT for one tiny little thing.
I'm unable to write any data to a donor nand chip.. 2 of them actually. I have a fully confirmed patched nand file thats been split and is ready to be flashed but no matter what combo of wiring I do these donor chips (from a ylod MB) will NOT successfully take a new flash onto them.
As you can see in the picture what I'm getting back from the chip after writing to it is a lot of FF's
Both chips read and report correctly with the teensy and they give me full 135168kb dumps each and every time but when I initiate a write with the patched file they just seem to not want to cooperate with me. If I read the original chips I get a clean dump every time so I know my wiring is ok and there's no interference.
I'm using a teensy2ps3 board with a top loader tsop socket powered via an external 3.3v power supply capable of 3a max output (I know this whole process won't require any where near that much power but its definitely not a power issue).
The only thing to really note is that I'm not using any capacitors accross the vcc and vss terminals
I'm really at a loss here and I dont want to write to the original chips from this board until I can get a proper write and dump onto a donor chip.
Is there a way to use the teensy to check specifically for bad blocks on these nand chips?
I'm unable to write any data to a donor nand chip.. 2 of them actually. I have a fully confirmed patched nand file thats been split and is ready to be flashed but no matter what combo of wiring I do these donor chips (from a ylod MB) will NOT successfully take a new flash onto them.
As you can see in the picture what I'm getting back from the chip after writing to it is a lot of FF's
Both chips read and report correctly with the teensy and they give me full 135168kb dumps each and every time but when I initiate a write with the patched file they just seem to not want to cooperate with me. If I read the original chips I get a clean dump every time so I know my wiring is ok and there's no interference.
I'm using a teensy2ps3 board with a top loader tsop socket powered via an external 3.3v power supply capable of 3a max output (I know this whole process won't require any where near that much power but its definitely not a power issue).
The only thing to really note is that I'm not using any capacitors accross the vcc and vss terminals
I'm really at a loss here and I dont want to write to the original chips from this board until I can get a proper write and dump onto a donor chip.
Is there a way to use the teensy to check specifically for bad blocks on these nand chips?
