3 ms·
You can get lots of very weird results trying to read a chip this way. Powering the chip will inevitable power other things around the chip, things that might
by pstrateman 2y ago
You can get lots of very weird results trying to read a chip this way.
Powering the chip will inevitable power other things around the chip, things that might also be trying to read it.
- _moof 2y agoYeah, it's best if you can also hold down any reset lines on other things on the board.
- jayyhu 2y agoAlso you could potentially damage the on-board voltage converter/regulator, since most aren’t designed to be back-driven from their outputs.
- mjg59 2y agoYou can frequently avoid this by running at a lower voltage - SPI chips are often rated to run down to under 3V, and associated components will tend not to run with that much power
- demondemidi 2y agoI tried to use something like this to read a flash on a car’s ECU. I even build a small probe station when the clip finally broke. I ended up having to desolder it. I don’t understand how hackers make in-circuit spi probing work on embedded systems. It always just magically works for them to clip a Pomona on and go. I don’t get it.
- userbinator 2y agoOn PC mobos it's usually not a problem as the BIOS is programmed after assembly. I've seen laptop repair shops in China do it all the time.