3 ms·
While I like duo, this video is a little misleading in the all of the chips shown a DIP package. Let’s see the same UV erase tried on WLCSP BGA parts. This is
by SlowRobotAhead 9y ago
While I like duo, this video is a little misleading in the all of the chips shown a DIP package. Let’s see the same UV erase tried on WLCSP BGA parts.
This is a pretty old technique. Almost every modern produce chip has mitigations for UV erasing.
- dsl 9y agoI don't know much about the decapping/chip security process. What is the benefit in selectively erasing part of the chip? How does that help you read the part that isn't erased?
- SlowRobotAhead 9y agoThe idea is that you can reset just the config bits. So the bits that keep the JTAG/SWD/ICSP from reading out the flash. So imagine your flash is over here, and your SRAM is over here, and over on this other side is the SFRs and inside those are bits that once set disable the debug interface. Reset just those and you can dump the firmware.