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What is the difference between two-wire and I2C?

时间: 2024-05-31 19:07:10 浏览: 119

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Two-wire and I2C are both communication protocols used for transferring data between electronic devices, but there are some differences between them: 1. Number of wires: Two-wire uses two wires for communication (data and clock), while I2C uses two wires as well (SDA and SCL), but it also requires a ground wire. 2. Speed: I2C is generally faster than Two-wire. I2C can operate at speeds up to 3.4 Mbps, while Two-wire typically operates at speeds up to 400 kbps. 3. Addressing: Two-wire uses a 7-bit addressing scheme, which limits the number of devices that can be connected to the bus. I2C, on the other hand, uses a 7-bit or 10-bit addressing scheme, which allows for more devices to be connected. 4. Compatibility: Two-wire is a proprietary protocol developed by Philips/NXP, while I2C is an open standard protocol that is widely used in the industry. 5. Applications: Two-wire is commonly used for low-speed communication between devices, such as in smart cards, sensor networks, and small displays. I2C is used in a wide range of applications, including LCD displays, sensors, EEPROMs, and microcontrollers.

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