I3C protocol
I3C (Improved Inter-Integrated Circuit) is a communication protocol that extends and enhances the capabilities of I2C (Inter-Integrated Circuit) and SPI (Serial Peripheral Interface) protocols. It was developed by the MIPI Alliance, which is a consortium of companies that develop specifications for mobile devices.
I3C is designed to support a wide range of devices, including sensors, power management ICs, touch controllers, and more. It offers several advantages over I2C and SPI, including higher data transfer rates, lower power consumption, and better support for interrupt handling.
One of the key features of I3C is its dynamic addressing scheme. Unlike I2C, which requires each device to have a unique address, I3C allows devices to share addresses. This is achieved through the use of a dynamic address assignment process, which assigns addresses to devices based on their capabilities and requirements.
I3C also introduces a new data transfer mode called the High-Speed Data (HSD) mode, which allows for data transfer rates of up to 33.33 MHz. This is a significant improvement over I2C's maximum data transfer rate of 3.4 MHz.
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In addition, I3C supports multi-drop connections, which allow multiple devices to be connected to the same bus. This is achieved through the use of a multi-drop address resolution protocol (MDARP), which enables devices to dynamically discover and communicate with each other.
I3C also includes a number of advanced features, such as in-band interrupts, hot-join capabilities, and support for system-level management functions. These features enable more efficient and flexible communication between devices and help to simplify system design.
Overall, I3C is a versatile and powerful communication protocol that offers significant improvements over I2C and SPI. Its dynamic addressing scheme, high-speed data transfer mode, and support for multi-drop connections make it well-suited for a wide range of applications, from mobile devices to industrial automation systems.