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Fill value in auto checksum (CRC) calculation

Question asked by Clonimus74 on Aug 29, 2016
Latest reply on Aug 30, 2016 by Clonimus74
Hi all,

In the instruction for the IELFTOOL tool in IAR they instruct to fill unused ROM with 0xFF, is is arbitrary or is there some logic to it?

The reason I ask is that if I fill it with 0x00 (as the erase flash value is) I don't have to waste time programming empty space in bootloader update.

I leave the ROM range at max in the IELFTOOL tool (and bootloader crc verification function) because I have no idea how large the application might be in the future.