external UART Boot

Hi,

I am using the DA14580 BLE module (Muarata ZY or UGMZAA) in my project,
I have a STM32 Host controller, using which I want to interface to the Murata ZY module through UART.

我没能找到任何用户手册的经验lains - DA14580 External processor interface over UART .
Can you please share them.

I was able to find "UM-B-013-DA14580 External processor over SPI interface", but I would like to do the same with an UART interface.

Please help.
Thanks in Advance.