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DS90UB948-Q1: Wackup signal transmission through FPD Link

Part Number: DS90UB948-Q1

If we use FPD Link to transmit wakeup signal and wakeup request signal, what's requirement about the transfer impedance. The schematic we design is showed as below, but it can't work. When connected to DS90UB949 EVM board, the lock signal of DS90UB948 is low, and the I2C communication is fail.Deserializer.pdf