Hello I have been working on an application for some time now. It is based on the DA14585 MSK IOT design. I just had about 15 boards made
as a development/test platform for this product. I used the same pinout for the DA14585 shown in the DA14585_DB_IOT+VC_SCH. In this schematic,
pin 38 is just sent to a capacitor which is not placed. So after seeing this and after reading the datasheet for the DA14585 it seemed this pin was not
needed. So in my design I did not connect this pin (as you didn't). Now I read that I need to have the secondary bootloader programmed in order to
boot from the external flash memory I have installed (as is installed on your MSK design as well). So in order to install the secondary bootloader
I suppose I need access to that pin 38 to set it to 6.8 volts for the OTP programming. I cant gain access to that pin now with the boards I had made.
Is this true? Is there a away around having to use this pin while still being able to boot from the external flash? How did you do this at the factory
(did you use a zif programmer or something like that) as I am surpised that you had the OTP programmed ahead of time on the chips before they
were soldered on the board (?) as there doesnt appear to be anything connected to your pin 38 on the schematic.
Please help. Thank you.