In reference manual section 8.9 it says that if BOOT_CFG4 fuse is set, "the chip supports recovery devices".
What does it mean exactly ?
If no valid U-Boot is found it try to load on recovery SPI flash ?
or if BOOT_CFG4 is set it forces load on recovery SPI flash even if valid U-Boot is in primary device ?
Is BOOT_CFG4 GPIO is taking into account in internal boot mode instead of eFuse ?
Thanks in advance for you help.