How the I2C Bus Works - EEWeb
How the I2C Bus Works - EEWeb
How the I2C Bus Works - EEWeb
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I 2 C <strong>Bus</strong> Features<br />
• Only 2 bus lines required: data (SDA) and clock (SCL)<br />
• Each device connected to <strong>the</strong> bus is software addressable by a<br />
unique address<br />
• 2 modes: Master-Transmitter and as Master-Receiver<br />
• Multi-master capable protocol:<br />
collision detection<br />
arbitration<br />
• Serial bi-directional data transfers:<br />
100 kbit/s Standard-mode<br />
400 kbit/s Fast-mode<br />
3.4 Mbit/s High-speed mode<br />
• Maximum bus capacitance = 400 pF (without repeaters) which is<br />
about 20 – 30 devices or 10 ft of wire<br />
Semiconductors 10