https://devzone.nordicsemi.com/f/nordic-q-a/92148/nrf52832-minimum-microcontroller-interface-signals-req-dI am looking at adding BLE to an existing design. The product uses an ARM micro, and currently has SPI and I2C available at daughterboard connectors. I am trying to understand the minimum interface signals that are required, between the ARM micro anden-USTelligent Community 13Tue, 20 Sep 2022 20:49:08 GMThttps://devzone.nordicsemi.com/thread/387173?ContentTypeID=1Tue, 20 Sep 2022 20:49:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6c1a34e6-35b0-42a0-8f5e-8242b3cdedd4Nguyen Hoan Hoang<p>Full control or not is relative to the firmware running on it. &nbsp;It is up to you to write the firmware on the nRF52832 to do what you need it to do.</p> <p>The nRF52832 is itself an ARM M4F 64MHz 512KB Flash 64KB RAM. &nbsp;Do you really need a second MCU ?</p><div style="clear:both;"></div>