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Dear Team,
In our system, TCA9548 is used in the following order:
Power-up reset pulls reset pin
Write command to select channel 1 – > 0x02
Operate the I2C device behind mux
Write command 0x00 to close all channels when the operation is complete.
Return to step 2.
During this continuous operation, we found that in step2, communication errors often occur on the mux I2C input port, sometimes the SCL is lost. Sometimes the data on SDA is incorrect. The reason is unknown.
if our processes are reasonable and if there is room for further optimization. Thank you!
Dear Hill,
FYI.
And Pls help to confirm if we need run 0x73(9548 i2c address) 0x00 after every read/write cycle , show is last picture?
abnormal waveform
Normal Waveform:
