Schematic

[Matt Krass]

Originally Posted by Tom Bottiglieri

I'm wondering if IFI has built any security into their controllers. I'm pretty sure the two processors are connected via SPI, so a re flash of both will give you two processors to play around with. It may be hard to check that without bricking the controller though.

Does anyone know if PICs support Flash-lock? On AVR chips you can set certain fuses on the chip (think configurable parameters in the chips hardware) to lock down the Flash and EEPROM so it's read-only, write-only or even neither, necessitating the need to directly modify the Flash/EEPROM or use a bootloader.

Do PICs support this? If not, or if its not enabled by chance, you can try to do a read-back of both chips Flash to get an idea of what they're doing. Of course IFI might show up on your doorstep with one of those MIB flashy-things...