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TCA9539-Q1: Read from Register

Part Number: TCA9539-Q1
Other Parts Discussed in Thread: TCA9539

Hello team,

I receive a question from the customer.

They say that sometimes there is no ACK at the yellow line timing when the following conditions are present. Do you know the cause?

1. read data from Input Port 0 at I2C address 0x74 -> None ACK
2. read data from Input Port 1 at I2C address 0x74 -> None ACK
3. read data from Input Port 0 at I2C address 0x75 -> OK
4. read data from Input Port 1 at I2C address 0x75 -> None ACK

Regards,

Masa