ZHCSMR4A november 2020 – november 2020 DS90UB662-Q1
PRODUCTION DATA
The DS90UB662-Q1 is a sensor hub that aggregates up to four inputs acquired from a FPD-Link III stream and transmitted over a MIPI sensor serial interface (CSI-2). When coupled with the DS90UB633A-Q1 or DS90UB63x CSI-2 FPD-Link III serializer, the DS90UB662-Q1 receives data streams from multiple imagers that can be multiplexed on the same CSI-2 link. The DS90UB662-Q1 supplies a single MIPI CSI-2 port, configured with four lanes with up to 1.6 Gbps per lane. The DS90UB662-Q1 can support multiple data formats (programmable as RAW, YUV, RGB) and different sensor resolutions. The CSI-2 Tx module accommodates both image data and non-image data (including synchronization or embedded data packets).
The DS90UB662-Q1 CSI-2 interface combines each of the sensor data streams into packets designated for each virtual channel. The output generated is composed of virtual channels to separate different streams to be interleaved. Each virtual channel is identified by a unique channel identification number in the packet header.
When the DS90UB662-Q1 is paired with a DS90UB63x CSI-2 Serializer serializer, the received FPD-Link III forward channel is constructed in 40-bit long frames. Each encoded frame contains video payload data, I2C forward channel data, and additional information on framing, data integrity and link diagnostics. The high-speed, serial bit stream from the DS90UB633A-Q1 contains an embedded clock and DC-balancing to allow sufficient data line transitions for enhanced signal quality. When paired with ADAS serializers in RAW input mode, the received FPD-Link III forward channel is similarly constructed at a lower line rate in 28-bit long frames.The DS90UB662-Q1 device recovers a high-speed, FPD-Link III forward channel signal and generates a bidirectional control channel control signal in the reverse channel direction. The DS90UB662-Q1 converts the FPD-Link III stream into a MIPI CSI-2 output interface designed to support automotive sensors, including 1MP/60fps image sensors.
The DS90UB662-Q1 device has four receive input ports to accept up to four sensor streams simultaneously. The control channel function of the DS90UB633A-Q1 / DS90UB662-Q1 pair supplies bidirectional communication between the image sensors and ECU. The integrated bidirectional control channel transfers data bidirectionally over the same differential pair used for video data interface. This interface has advantages over other chipsets because the interface eliminates the need for additional wires for programming and control. The bidirectional control channel bus is controlled through an I2C port. The bidirectional control channel supplies continuous low latency communication and is not dependent on video blanking intervals.