Kai at 2019-09-15T08:07:28

2019-09-15T08:07:28Z

← Older revision		Revision as of 2019-09-15T08:07:28
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	I2C (or I<sup>2</sup>C or IIC) is a ~~specification for~~ serial digital communication between closely located circuit components (usually on the same board). It requires only two wires. There can be only one master but multiple slaves. Unlike UART or [[SPI]], I<sup>2</sup>C specifies [https://en.wikipedia.org/wiki/Open_collector ''open-collector''] or ''open drain'' pins that are connected to the positive line voltage via pull-up resistors. The connected devices pull down their wired data pin to 0 V for signaling. Unless any of the wired devices pulls down the line the line voltage remains in its default HIGH state.		The Inter-integrated circuit (I2C or I<sup>2</sup>C or IIC) specification defines a protocol serial digital communication between closely located circuit components, usually on the same board. The electrical connection requires only two wires. There can be only one master but multiple slaves. Unlike UART or [[SPI]], I<sup>2</sup>C specifies [https://en.wikipedia.org/wiki/Open_collector ''open-collector''] or ''open drain'' pins that are connected to the positive line voltage via pull-up resistors. The connected devices pull down their wired data pin to 0 V for signaling. Unless any of the wired devices pulls down the line the line voltage remains in its default HIGH state.
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Kai at 2016-05-12T07:51:09

2016-05-12T07:51:09Z

New page

I2C (or I2C or IIC) is a specification for serial digital communication between closely located circuit components (usually on the same board). It requires only two wires. There can be only one master but multiple slaves. Unlike UART or [[SPI]], I2C specifies [https://en.wikipedia.org/wiki/Open_collector ''open-collector''] or ''open drain'' pins that are connected to the positive line voltage via pull-up resistors. The connected devices pull down their wired data pin to 0 V for signaling. Unless any of the wired devices pulls down the line the line voltage remains in its default HIGH state.
 
 
Due to the open-collector outputs devices with incompatible logic voltage levels can be connected directly without the need for level shifting. The pull-up line voltage should correspond to the lowest of the HIGH voltage levels of the wired devices and needs to exceed the minimum voltage level for which HIGH is defined on any device. Only then will the devices be able to sense the correct data bit despite the different HIGH voltage levels.
 
 
External Links
* [https://en.wikipedia.org/wiki/I%C2%B2C Wikipedia Article]

I2C - Revision history

Kai at 2019-09-15T08:07:28

Kai at 2016-05-12T07:51:09