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The I2C expansion chip of PCA9544A, after the value of its register is modified, why does it read out unchanged? The device address is 0x70, and the register I read and write is 0x0
The software is to open the I2C bus, and then read the device address is X70. The read and write register is 0x00. No matter what data I write, the read value is 0xf0
We are now going to modify the value of the register. We wrote and returned that the write was successful. However, when reading, it is still 0xf0
Does this pin hang have any effect？
