So I2C is more robust in a noisy environment. Unlike the SPI protocol, the I2C protocol has an acknowledgementįeature that means a sending device knows that a receiver has accepted theĭata. The great strength of the protocol is that it only requires two wires, yetĬan have many connected devices and all of these can transmit and receive dataĪt high speed. So a faster clock allows a quicker update. Speed is important as the data is transmitted serially, Not all chips support all speeds but 100kHz isĬommonly supported. I2C is a serial protocol that can operate at different speeds 100kHz,Ĥ00kHz, and 3.4MHz. Manufacturers avoid paying royalties, or avoid patent problems, byĬalling it a 2 wire protocol but it's the same I2C protocol (when you Most common use for I2C in a small system. Level discussing single master mode (a single controlling device) which is the This I2C tutorial shows you how the I2C protocol works at the physical bit ![]() With I2C extenders - just don't do it - it ends in tears! (horror stories) of people designing a multi drop inter office communication system Warning: The protocol is designed for single boardĬommunication it is not a long distance communication system.
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