I2C introduction: The protocol

Рет қаралды 41,320

2 жыл бұрын

Download the Analog Engineer's Pocket Reference e-book.
www.ti.com/amplifier-circuit/...
This video describes the basics of I2C communication. The video explains
the physical hardware aspects of I2C as well as the digital communications
protocols used in I2C. Protocol topics include I2C addressing, I2C start
conditions, I2C stop conditions, and I2C communications acknowledgement.
Hardware topics focus on how open drain outputs can be used for bidirectional
communications.

Пікірлер: 23

@mohamedsalahmoghazy4062 2 жыл бұрын

Great Tutorial Thanks a lot

@mrshodz Ай бұрын

Excellent material.

@MarkTheEngineer 2 жыл бұрын

At about 13:36 (discussion of I2C STOP condition) the audio states that SCL is released and then SDA is released. This appears to be the reverse of what actually happens.

@GarageFactorySD 2 жыл бұрын

I agree

@sarans96 2 жыл бұрын

Yes thats a mistake in diagram.

@sravanakumar9326 2 жыл бұрын

Yes, it's a mistake

@mranalogman3525 Жыл бұрын

As others have pointed out, the diagram is incorrect, but the audio is correct. This is a really nice tutorial but I would like to see the repeated start condition covered.

@witchdoctor88 Жыл бұрын

You are spot-on. This video is misleading and low-effort… not what I expected of TI.

@dipeshverma29 11 ай бұрын

@ 12:37 you did not explain why is the SCL is gated after Address frame ACKT, and also why SDA is high for one pulse.

@Commentreader-gp2ie 10 ай бұрын

SCLK: it is not gated, if sclk becomes high then it is considered as transfer of bits and at that time we are not interested to send data so we can keep the sclk low indicating that there is no data transfer at that moment. SDA: we can keep any value for sda during negative edge of sclk line, the device will sample only during positive clock duration (it has to be stable)

@champ2133 10 ай бұрын

Gating SCL after an Address Frame ACK allows devices to synchronize and complete tasks before proceeding to the next operation for the seek of reliability. As for SDA, it remains stable (high or low) when SCL transitions from low to high to prevent unintended data transitions and maintain synchronization.

@gandhiyash007 5 күн бұрын

wired AND

@Salador1777 2 ай бұрын

I thought this would be an easy primer....ok it is easy? All the transistors being mentioned are already on. The modules? Or is this meant for engineers who are designing the boards? Because the thing is an IC... A bunch of ic's?

@VeritasEtAequitas 2 ай бұрын

For writing drivers too.

@mouselmao 6 күн бұрын

I think it's meant for anyone who plans on using I2C in their devices. For example, the sensors I am using in my device communicate using I2C, so I'm just watching this to understand the basics before I watch more complex videos to learn how to pull data from my sensors. The part about the transistors is likely to explain how the lines are pulled to low voltage because many people like to learn about the underlying mechanics so that they know where to look if there's something wrong with their device.