I have an MCU that can boot from two locations of it's flash. The flash is 2097152 bytes, and the MCU will boot from location 0 or half way.  So I created a layout file, like so: 00000000:0000fffff bank0 00100000:0001fffff bank1 But flashrom is demanding the image to be written is the full 2097152 bytes.  What am I missing? flashrom -p .... --layout my_layout --image bank0 -w flash.bin Error: Image size (1048576 B) doesn't match the flash chip's size (2097152 B)!