SNLS454A November 2014 – March 2019 DS90UB947-Q1
The DS90UB947-Q1 automatically detects the capabilities of downstream links and can resolve whether a single device, dual-capable device, or multiple single link devices are connected.
In addition to the downstream device capabilities, the DS90UB947-Q1 will be able to detect the OpenLDI pixel clock frequency to select the proper operating mode.
If the DS90UB947-Q1 detects two independent devices, it will operate in Replicate mode, sending the single channel video on both connections. If the device detects a device on the secondary link, but not the first, it can send the video only on the second link.
Auto-detection can be disabled to allow forced modes of operation using the Dual Link Control Register (DUAL_CTL1).