Dual-port CSI-2 quad deserializer hub for faster, flexible ADAS

October 20, 2016 // By Graham Prophet
Texas Instruments claims a first with its dual-port quad deserializer hub that is compliant with the MIPI Camera Serial Interface 2 (CSI-2) specification: it aggregates and replicates data from multiple high-resolution sensors in automotive camera and radar applications.

The new automotive-qualified hub simultaneously aggregates and replicates high-resolution data from up to four cameras. High data throughput and precision are essential in autonomous driving and sensor fusion-based advanced driver assistance systems (ADAS), including surround-view systems, rearview cameras, driver-monitor cameras, camera-monitor systems, front camera systems and satellite radar equipment.


The device’s higher bandwidth enables processing of more video data at faster speeds in equipment designed to recognize pedestrians, bicyclists and other obstacles in a vehicle’s path or periphery. The DS90UB964-Q1 FPD-Link III device’s dual CSI-2 outputs with virtual channel ID mapping and port replication save processor resources to speed processing of data from up to four cameras at 100 MHz per sensor and 12-bit resolution. TI’s adaptive equalization (EQ) provides diagnostics that enable the system to monitor cable health and take action before cable failure occurs.


The DS90UB964-Q1 quad deserializer hub offers;

Faster video processing: Dual-port CSI-2 outputs support video transmission at up to 1.6 Gbps per lane for higher bandwidth and faster obstacle recognition by supporting the following:

- The second CSI-2 port enables simultaneous video replication for data logging, or separate viewing and machine-vision flows.

- The hub supports virtual channel ID mapping which helps processors differentiate cameras and high-dynamic-range exposures, enabling more efficient processing.

- The ultra-low-latency control channel enables integration of the image signal processing (ISP)


The DS90UB964-Q1 features adaptive receiver EQ (equslisation) rather than transmitter pre-emphasis. Adaptive EQ automatically compensates for cable aging and bending effects to ensure optimal signal quality, and helps reduce electromagnetic interference (EMI).


The DS90UB964-Q1 deserializer hub can work with many processors on the market today, including the TDA3x SoC processor for ADAS. The power-over-coax support in both devices enables engineers to significantly reduce the wiring needed in their systems. In addition to the DS90UB964-Q1 1-megapixel (MP) deserializer hub, TI is now sampling SerDes devices for 2-MP cameras at 60 frames per second. These 2-MP devices feature