Hi Prasanna, Sorry about the delay in getting back to you. Question : What is the reference for start/end? ADC clock or Pixel clock or something else. Response : The reference point for Start and End values is from pixphase (which can take on 4 different values) as shown below from page 77: Figure 19-21 also show this with timing diagrams for different operating modes As noted above, all Start and End timings are relative to pixphase. The value entered in the register is the measure of number of clock edges from pixphase. This is also shown in Figure 33-34 with timing diagrams. BTW, here is some additional detail not easily captured from the datasheet for your reference: For MODE3, PIXn start and PIXn end values can be from 0 to 41 For MODE2, PIXn start and PIXn end values can be from 0 to 27 For MODE1, PIXn start and PIXn end values can be from 0 to 13 The max values above are doubled if the 1/2 frequency mode is enabled for that PIX generator. Regards, Hooman
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