With its clock running up to 12.5MHz in SDR (Single Data Rate) mode it can be 10x fast than I2C even in the widely adopted fast mode plus, and more than double the speed of I2C top ultra-fast mode.

Arduino. AVR - Arduino Uno, Mega, Leonardo, Pro Mini, Nano etc. NOTE: Arduino boards based on ATmega328 (Uno, Pro Mini, Nano etc.) and smaller are NOT recommended. This is because the ATmega328 MCU is ...