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DS90UB921-Q1: DS90UB921-Q1 change display parameter

Part Number: DS90UB921-Q1
Other Parts Discussed in Thread: ALP

Hi Expert,

My customer is using DS90UB921-Q1 in their project. The previous screen is 720p 60fs, but now the parameters are changed to 1920x1080 30fps. I cannot find the register to change the parameter. 

I find a reply on E2E that, 921 does not need any such code to initialize. It will automatically start outputting video when video is applied and the DES is connected. 

I ask my customer to connect the new screen directy. However, the screen only shows part of the picture. Would you mind helping me to clarify how to change the registers?

Kind Regards


  • Hi Imelda,

    There is not a register for the resolution in the serializer to change, this is done automatically like you stated before.

    What deserializer is the 921 connected to? In addition to this, have you tried enabling PATGEN through the Pattern Generator tab in ALP to see how that displays on the new monitor?


    Cameron Carlson