The power consumption per bit-transfer in all I3C modes is more efficient than I²C, due to the use of push-pull (vs. Open-Drain) and strong Pull-Up signaling.

Further, I3C can save considerable device power through higher data rates (because the device can be put back to sleep sooner), built-in configuration and control (without intruding on the main communication protocols), In-Band Interrupt (IBI) as a low-cost wake mechanism, and the ability for Targets to shut down all internal clocks while still operating correctly on the I3C Bus.

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