SNLS543 August 2018 DS90UH949A-Q1
The DS90UH949A-Q1 converts an HDMI interface (3 TMDS data channels + 1 TMDS Clock) to an FPD-Link III interface. This device transmits a 35-bit symbol operating at up to 3.675-Gbps line rate over either a single serial pair or two serial pairs. The serial stream contains an embedded clock, video control signals, RGB video data, and audio data. The payload is DC-balanced to enhance signal quality and support AC coupling.
The DS90UH949A-Q1 serializer is intended for use with a DS90UH926Q-Q1, DS90UH928Q-Q1, DS90UH940A-Q1, and DS90UH948A-Q1 deserializer.
The DS90UH949A-Q1 serializer and companion deserializer can incorporate an I2C-compatible interface. The I2C-compatible interface supports the programming of serializer or deserializer devices from a local host controller. The devices can also incorporate a bidirectional control channel (BCC) that allows communication between the serializer and deserializer as well as between remote I2C slave devices.
The bidirectional control channel (BCC) is implemented through embedded signaling in the high-speed forward channel (serializer to deserializer) combined with lower speed signaling in the reverse channel (deserializer to serializer). Through this interface, the BCC provides a mechanism to bridge I2C transactions across the serial link from one I2C bus to another. The implementation allows for arbitration with other I2C-compatible masters at either side of the serial link.