DS90UR124: Pinout Questions

Part Number: DS90UR124
Other Parts Discussed in Thread: DS90UR241, DS90UR241-Q1,

Tool/software:

I am trying to implement the DS90UR241/DS90UR124 Serializer/Deserializer FPD Link II chipset.  In the datasheet for these two devices, the 24 LVCMOS parallel output pins for the deserializer are listed as Rout0 through Rout23.  However, these chips seem to only be capable of RGB666 18 bit color, and not 24 bit color.  I would assume that 18 output lines are for color, one line is for HSync, one line is for VSync, 

The datasheet does not seem to specify which pins are for Red 0-5, Blue 0-5, and Green 0-5, along with HSync, VSync, and DE for sending to an LCD screen.  Is there a specific pinout for these devices?  If not, does the pin configuration of the deserializer output depend on the pin configuration of the serializer input?  Since all the pins are digital data, it seems the actual lines are interchangeable and which pins are RGB666, HSync, VSync, and DE are dependent on the pcb design layout for the serializer.

Thanks in advance for any assistance.

  • Hi Blaise,

    The DS90UR241-Q1/DS90UR124-Q1 chipset is designed to support an 18-bit color depth: RGB666 + HSync, VSync, and DE + three additional GPIO bits. Thus, for example with the DS90UR241-Q1/DS90UR124-Q1 chipset, the DIN/ROUT[17:0] pins can be used for RGB data, and DIN/ROUT[20:18] pins can be used for HSYNC, VSYNC, and DE. This chipset was not designed for RGB888.

    These SerDes devices will route whatever you input on one parallel input for the serializer side to the corresponding parallel output for the deserializer side. Ultimately, it is up to you to decide exactly which parallel input you want to use when routing signals. What matters most in this setup is that the same parallel input is routed to same parallel output (for example, DIN0 routes to ROUT0).

    Best Regards,

    Gil Abarca