sequential (59) I2C and SPI protocol

 https://wodewangzhishime.blogspot.com/2022/06/what-does-he-need.html

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Ref: https://wodewangzhishime.blogspot.com/2022/06/httpswodewangzhishime_70.html 

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John: In the world, there're plenty protocol of communications. You might have a look . //. https://instrumentationblog.com/communication-protocols/ .  For example, RJ45, I2C, USB, SPI, and, so on and on. Now, we use I2C as an example.

Me: OK.

John: At the picture above, do you see that there're 2 chips? They are Chip A and Chip B. They use the interface of I2C to connect to each others. Chip A is master. Chip B is slave. That mean Chip B must use the clock line of Chip A.

Me: OK.

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Inside Chip A, there're 2 clock line.

1) The clock line of RJ45

2) The clock line of system.

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John: Then, which clock line does (the register of I2C of the master) choose?

Me: Normally, (the register of I2C of the master) use the clock line of System.

John: However, hackers hack it. It become

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Subject [the register of I2C of master]

Interrupt [the clock line of RJ45] <---- Originally, it is the clock line of System.

Object [Slave from Chip B]

Value [pending]