ZHCSIG6A July 2018 – October 2018 DS90UH940N-Q1
PRODUCTION DATA.
The DS90UH940N-Q1 receives a 35-bit symbol over single or dual serial FPD-Link III pairs operating at up to a 3.36-Gbps line rate in 1-lane FPD-Link III mode and 2.975 Gbps per lane in 2-lane FPD-Link III mode. The DS90UH940N-Q1 converts this stream into a CSI-2 MIPI Interface (4 data channels + 1 clock, or 8 data channels + 2 clocks in replicate mode). The FPD-Link III serial stream contains an embedded clock, video control signals, audio, GPIOs, I2C, and the DC-balanced video data and audio data which enhance signal quality to support AC coupling.
The DS90UH940N-Q1 is intended for use with the DS90UH949-Q1 or DS90UH947-Q1 serializers, but is also backward compatible to the DS90UH925Q-Q1, DS90UH925AQ-Q1, and DS90UH927Q-Q1 FPD-Link III serializers.
The DS90UH940N-Q1 deserializer attains lock to a data stream without the use of a separate reference clock source, which greatly simplifies system complexity and overall cost. The deserializer also synchronizes to the serializer regardless of the data pattern, delivering true automatic plug and lock performance. It can lock to the incoming serial stream without the need of special training patterns or sync characters. The deserializer recovers the clock and data by extracting the embedded clock information, validating then deserializing the incoming data stream. It also applies decryption through a high-bandwidth digital content protection (HDCP) Cipher to this video and audio data stream following reception of the data from the FPD-Link III decoder. On-chip non-volatile memory stores the HDCP keys. All key exchange is done through the FPD-Link III bidirectional control interface. The decrypted MIPI CSI-2 interface is provided to the processor.
The DS90UH940N-Q1 deserializer incorporates an I2C-compatible interface. The I2C-compatible interface allows programming of serializer or deserializer devices from a local host controller. The devices also 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 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.