UFC921A101 3BHE024855R0101 | ABB | Graph waveform analysis module

Description

UFC921A101 3BHE024855R0101 | ABB | Graph waveform analysis module

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For friends who are developing embedded UFC921A101  , the I2C protocol is extremely familiar. There are too many devices that use I2C for corresponding settings. Today, let’s casually talk about this I2C protocol.
The most important point in the I2C protocol is the I2C address. This address comes in two forms: 7 digits and 10 digits. 7 bits can represent 127 addresses, and in practical use, there are basically not so many settings mounted, so many devices use 7 bits for addresses. Therefore, the following explanations in this article are based on this.

Another important concept of I2C is “master-slave”. For devices, they do nothing, let alone automatically send data; And the main device plays a controlling role, everything starts from it.
Except for GND, UFC921A101  has two wires, SDA and SCL, and all devices are connected to these two wires. So, how do these devices know that data is being sent to them? This depends on the address mentioned earlier. The address of device I2C is fixed, such as 0x50, 0x60, and so on. Because there can only be 127 addresses, address conflicts are common, so most devices will have an address to choose a UFC921A101  , such as 0x50 when pulled up and 0x60 when grounded. What if there is a conflict with other chips, whether it is raised or grounded? The answer is: Cold mixed, there’s no way. In this situation, we can only replace the chip.

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