Embedding it on the board won't work. Fraudsters are really good at doctoring chip and board makings nowadays, even below the solder mask. It's hard to imagine as a westerner, but the necessary equipment to do that kind of thing is trivially available in most of east Asia.
On-chip fuses would be a good solution. Which, of course, is already what they're using to lock chips to specific memory. There's just not a good reason to brick the board when the memory doesn't match. Have the firmware flash a warning on the screen before boot. Problem solved.
On-chip fuses would be a good solution. Which, of course, is already what they're using to lock chips to specific memory. There's just not a good reason to brick the board when the memory doesn't match. Have the firmware flash a warning on the screen before boot. Problem solved.