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DS90UB934-Q1: I2C read incorrect through FPD-LINK

Part Number: DS90UB934-Q1


we are building a card to switch the image from camera. You can see the block diagram in attachment. Now we meet a problem, when we want visit 0xB0 of 913 in camera side from 934 in ECU side,   you can see the pic,we actually get the 0x30 as a response. that is not the 913 address. I think maybe some registers has not been ready. would you help to check it? I have enable I2C througout of every deserializer and Serializer.switch board.pdf