This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DS90UB940N-Q1: Question for DPHY timing parameter guide

Part Number: DS90UB940N-Q1
Other Parts Discussed in Thread: DS90UH940N-Q1

Hello Team,

My customer has question for DPHY timing parameter setting guide(SNLA303) of 940N

Could you pls help answer their question as below??

1) TI recommends Ti's validated timing parameter setting rather than automatically calculated setting??

2) In example script for timing setting, those value in table seems decimal value.

but when implement it as script, it looks hex value.

for Tclk_zero, its value is 31. so customer understand they should set it to 9f(1001_1111) for tclk zero. but script set it to b1(1011_0001)

So pls help me to provide correct setting guide to customer

Thanks 

  • Hello Harry,

    You are correct. This looks like a typo

  • Hi Hamzeh,

    Thanks for quick reply.

    Could you pls help answer this as well??

    1) TI recommends Ti's validated timing parameter setting rather than automatically calculated setting??

    Thanks for your help as always~

  • Hi Harry,

    No. The D-PHY timing parameters are correctly auto-determined when video resolution is one of the listed resolutions in Table 2 in the AppNote.

    If the video resolution is not listed in that table, then you have two options:

    First option is to program the TI-validated timing parameter settings in the DS90UH940N-Q1 CSI-2 indirect registers. The register settings control the timers for each phase of the CSI-2 transmission.

    The second option is to validate the auto-generated timing parameters and ensure they are within limits provided in Table 1.

  • Thanks for support ~!!