da14580 suota

I download my secondary_bootloader.hex in my ram instead of the otp, although the SUOTA1 can be discovered, but when I want to update SUOTA2, the result is failed.
When I also download secondary_bootloader.hex with others into spi flash,the SUOTA can be success.
What's wrong?
Because I have only one da14580, so I can't download the otp.
I have change the spi gpio,
P2_6味噌
P2_9莫西人
p2_7 CS
p2_1 SCK