I3C (bus)

Common card · No. 298023

I3C or I³C, also known as SenseWire, is a specification to enable communication between microchips by defining the electrical connection between the chips and signaling patterns to be used. Short for Improved Inter-Integrated Circuit, the standard defines the electrical connection between the chips to be a two wire, shared (multidrop), serial data bus. One wire (SCL) transmits a clock signal to define the sampling times. The other wire (SDA) is a digital data line whose voltage can be sampled. The standard defines a signaling protocol in which multiple chips can control communication and thereby act as the bus controller. The I3C specification takes its name from, uses the same electrical connections as, and allows some backward compatibility with, the I²C bus, a de facto standard for inter-chip communication, widely used for low-speed peripherals and sensors in electronic devices. The I3C standard is designed to retain some backward compatibility with the I²C system, notably allowing designs...

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