Hello,
I have here an AT91R40008 cpu with external flash AT49BV322A.
The flash has the CFI interface too.
The RAM area of the CPU is 0x00300000 to 0x0033FFFF,
the flash has a size of 4194394x8 or 2097152x16.
The CPU use 16bit mode. Start address of flash is 0.
What are now the correct settings for the cfi options?
Should I use the word size or byte size for the size
parameter?
16bit: flash bank cfi 0x0000000 0x00200000 16 16 0
8 bit: flash bank cfi 0x0000000 0x00400000 16 16 0
Can I use these settings even if only a “window” is
mapped of the flash: 0x00000000 - 0x000FFFFF.
Or must I now use the mapped parameter?
I think I need a working_area too:
working_area 0 0x0000000 0x8000 nobackup
I do not know in which case I use nobackup or backup,
or what is the correct size for the working area.
Can someone explain this?
Best regards,
Michael