SNLS543 August 2018 DS90UH949A-Q1
I2S audio may be fanned-out and propagated in the repeater application. By default, data is propagated through Data Island Transport during the video blanking periods. If frame transport is desired, then the I2S pins should be connected from the deserializer to all serializers. Activating surround sound at the top-level deserializer automatically configures downstream serializers and deserializers for surround sound transport using the Data Island Transport. If 4-channel operation using the I2S_DA and I2S_DB only is desired, this mode must be explicitly set in each serializer and deserializer control register throughout the repeater tree (see Table 10).