JAJSHF5 May 2019 DS90UB949A-Q1
PRODUCTION DATA.
By default, audio is packetized and transmitted during video blanking periods in dedicated data island transport frames. Data island frames may be disabled from control registers if forward-channel frame transport of I2S data is desired. In this mode, only I2S_DA is transmitted to a DS90UB928Q-Q1, DS90UB940-Q1, or DS90UB948-Q1 deserializer. If connected to a DS90UB926Q-Q1 deserializer, I2S_DA and I2S_DB are transmitted. Surround sound mode, which transmits all four I2S data inputs (I2S_D[A..D]), may only be operated in data-island transport mode. This mode is only available when connected to a DS90UB928Q-Q1, DS90UB940-Q1, or DS90UB948-Q1 deserializer.