Hi, I'm trying to find a way to retrieve a unique Serial Number from every chip. That Serial Number must be write protected so it can't be overwritten when we re-program the device. What's the best way to do it? So far, I tried to program the BMI (boot-mode index) in the UCB2 page 1, but it doesn't seem to work. The Mac Address in BMI block copied in DSRAM1 at bootup is not constant and doesn't correspond to the value I want. However, the BMI Word (4 bytes in BMI string) is written successfully (I set the Mac Address valid flag). Any idea what I'm doing wrong?
Thanks,
Cedric