SNLS454A November 2014 – March 2019 DS90UB947-Q1
The DS90UB947-Q1 converts a single or dual FPD-Link (Open LDI) interface (up to 8 LVDS lanes + 1 clock) to an FPD-Link III interface. This device transmits a 35-bit symbol over a single serial pair operating up to 3.36Gbps line rate, or two serial pairs operating up to 2.975Gbps line rate. 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 DS90UB947-Q1 serializer is intended for use with a DS90UB926Q-Q1, DS90UB928Q-Q1, DS90UB940-Q1, DS90UB948-Q1 deserializer.
The DS90UB947-Q1 serializer and companion deserializer incorporate an I2C compatible interface. The I2C compatible interface allows programming of serializer or deserializer devices from a local host controller. In addition, the devices incorporate a bidirectional control channel (BCC) that allows communication between serializer/deserializer as well as remote I2C slave devices.
The bidirectional control channel (BCC) is implemented via 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.