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What is I2C and TWI?

April 26, 2017i2c twi

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What is I2C and TWI?

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I2C (pronounced “eye squared see”) is a synchronous serial protocol that operates on TTL levels and has provision for bi-directional communication between up to 127 (with 7 bit addressing) devices. It requires an SCL (clock) and SDA (data/address) line, as well as a ground connection. The bus is externally pulled high via a resistor. TWI stands for Two-Wire Interface. To be continued…