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DS90UH947-Q1: How to get the resolution information for the Open LDI input?

PYTsai
Genius 12350 points

Part Number: DS90UH947-Q1

Hi 

I am working on processor dual pixel Open LDI input --> DS90UH947 --> DS90UH948 --> panel 

I am not sure if DS90UH947 and DS90UH948 get the right resolution from Open LDI input . 

Is there any way to read our the resolution information from Open LDI in 947 and 948, so i can make sure my video path are correct ? 

Another question is that my current H/W configuration is DS90UH947, DS90UH948 and panel are dual pixel open LDI , do i need to do any register setting to get a correct output at my panel 1080P if my Open LDI input is 720P single pixel LDI? 

  • 0
    TI__Guru** 103215 points

    Hello PYTsai,

    For reading back the detected resolution, please refer to this app note: http://www.ti.com/lit/an/snla132d/snla132d.pdf

    Section 4.5, starting from bullet 5

    The Dual/Single OLDI configuration can be done on each side either by MODE strap or via register override.

    Register 0x4F for the 947 and register 0x49 for the 948. The single/dual configuration does not need to match on the 947/948 so long as the OLDI frequency min/max values are observed for each side. 

    Best Regards,

    Casey