I 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 and the nRF52832.
The datasheet implies that by default the nRESET signal is not connected to a pin, and thus does not have to be controlled by the ARM micro. Is this correct?
If I use the ARM micro to control the nRF52832 using the TWI (I2C) interface (nRF52832 as the slave), I understand that the I2C interface will not support high-speed communications. otherwise, does the I2C interface allow for full control of the nRF52832, without requiring any other signals?
Similar question for SPI -- If I use the ARM micro to control the nRF52832 using the SPI interface (nRF52832 as the slave), does the SPI interface allow for full control of the nRF52832, without requiring any other signals?
Thanks!
