SNLS477B October 2014 – November 2018 DS90UB948-Q1
By default, packetized audio is received during video blanking periods in dedicated data island transport frames. The transport mode is set in the serializer and auto-loaded into the deserializer by default. The audio configuration may be disabled from control registers if forward channel frame transport of I2S data is desired. In frame transport, only I2S_DA is received to the deserializer. Surround sound mode, which transmits all four I2S data inputs (I2S_D[D:A]), may only be operated in data island transport mode. This mode is only available when connected to a DS90UB927Q, DS90UB949-Q1, DS90UB947-Q1, or DS90UB929-Q1 serializer. If connected to a DS90UB925Q serializer, only I2S_DA and I2S_DB may be received.