Hi,
a question on NOR, non-muxed XIP mode.
I understand that the ROM bootloader initializes only GPMC_A0-A11, while the upper addresses remain in high impedance state and must be pulled down externally.
Now we also need sysboot[8]/GPCM_A12 = 1 for 16bit wide bus and sysboot[ ]/gpmc_a18 = 1 to select the 24MHz oscillator.
So, the Rom Bootloader will fetch the code in NOR at 0x0802 1000 (A18 and A12 high), correct?
Unless we add a couple of gates to invert those signals.
How does the ROM bootloader understand if there is a valid image in NOR? There is no need for an image header, right?
Best regards
Massimo
