alt Hacker NewsIs there no way to do that without code in OTP? The bootrom is supposed to scan for an IMAGE_DEF on both memory banks, and can use nCS1 as specified in FLASH_DEVINFO. Unless there's something I'm missing, that should be sufficient.
Is there no way to do that without code in OTP? The bootrom is supposed to scan for an IMAGE_DEF on both memory banks, and can use nCS1 as specified in FLASH_DEVINFO. Unless there's something I'm missing, that should be sufficient.
I have not disassembled the production RP2350 rom (last i looked at it was ~year before release) so i do not know if it does indeed check nCS1 address space, but even if it did, which of the 4 possible pins would it configure as nCS1? surely trying all would be dangerous (possibly breaking customer logic attached to this pins that does not expect them to wiggle at boot). This seems like it could break customer designs so I would be worried if this did happen. I could be wrong. You can read out the rom with a debugger and look, of course :)