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AM1808: am1808 I2C signal oscillation

Part Number: AM1808

1.On my board, AM1808 I2C0 chain has 7 devices, and the test finds that  the start position of  SCL/SDA rising edge oscillates , as shown in Figure 1.

2.Then, I made I2C0 only direct to one slice EEPROM by flying lines and found that SDA/SCL oscillation was more severe, as shown in Figure 2.

I don't know why it is like this, please help to analyze it, thanks.