I'm designing a 4k2k system with the ADV7619. I'm looking for an SDR output with at least 30 bit color depth (36 bit preferred) in RGB color space.
My calculations say that it will need a 297MHz pixel clock rate. One page in the datasheet says it can run at 300MHz but on page 16, the datasheet states:
DDR can be supported with LLC clock frequency up to 50 MHz (video modes with original pixel clock lower than 100 MHz, such as 1080i60). In SDR mode, 16-/20-/ 24-bit 4:2:2 or 24-/30-/36-bit 4:4:4 output is possible. In DDR mode, the pixel output port can be configured for 4:2:2 YCrCb or 4:4:4 RGB for data rates up to 27 MHz.
DDR 8-/10-/12-bit 4:2:2 YCrCb for data rates up to 27 MHz
DDR 12-/24-/30-/36-bit 4:4:4 RGB for data rates up to 27 MHz
What is 27MHz? Seems pretty slow... I must be overlooking something.
Is there a configuration that will give us 30 bits in RGB at 4k2k resolution?