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TX51 and TVP5150AM1

Andrew Riel
Prodigy 10 points
Other Parts Discussed in Thread: TVP5150AM1, TVP5150

I am going to work with the CMOS sensor interface of a directinsight Triton TX51 and a TVP5150AM1.  The TVP5150 will feed pins 103-110 (D[0:7]) on the TX51 with data from an anologue video camera.  Additionally they will feed 112, 113, 114 (HSYNC, VSYNC, and PIXCLK respectivly).  My concern comes with MCLK (pin 115 on the TX51).  I do not see an input for an MCLK on the TVP5150AM1.  Is this a necissary CLK?  I have found others one ubuntu forums that have written code for this configuration of parts, so I know this is possible and has been done before.  My current assumption is that MCLK is used for MUX between two CMOS inputs, does your TVP5150AM1 need to have a MCLK signal tied to anything?

Andrew

  • 0
    TI__Genius 16810 points

    Andrew,

    In most applcations a 14.318Mhz crystal is used with TVP5150AM1.  This cyrstal provides the clock source for internal video processing and clock generation.  The SCLK output is internally generated and serves as the 27MHz pixel clock for the 8-bit 4:2:2 YCbCr video data.  Most processors use this clock to directly clock in the video data.  I don't have access to the TX51 shcematic, so I am not sure how MCLK is used for video capture from a video decoder.  MCLK should not be required for TVP5150AM1 operation, however.