Thanks for the info. I will need to dig deeper into this material. First blush it does appear this would work for external memory. In our application we intend to communicate between two CYBLE-02001-00 modules. On one end it will be tied to an M8 ARM processor. On the other end we will be using the embedded M0 in the module itself to address another device via I2c and toggle a few GPIO pins.
Would this update methode still be valid?