I have a few questions about external FLASH：
1、I want to use DA14585 to boot from external FLASH. What should I do to reduce the current?
2、I bought DA14585 development board here. How should I measure the current of W25x20CL and DA14585?
3、If I need a SUTA upgrade, should I only be able to use external SPI FLASH because OTP can only burn once?