OMAP-L138/C6748/AM1808 VPIF Bus Alignment

William Shaffer

Other Parts Discussed in Thread: OMAPL138

I was wondering if there is any documentation that specifies how to align the bus of a raw CMOS imager to the VPIF for raw data capture. The issue is that in the DM6437 series DSPs, if you want to capture 8 Bit video, data lines D2-D9 are used on the video port of the DSP, while 10 bit video uses D0-D9. I don't see anything in the OMAP/AM/C674x documentation that describes which pins are used when the VPIF is configured to capture 8 or 10 bit video; it only states that it is possible to do so.

Any help would be appreciated. Thanks.

over 14 years ago

0 Clay Turner over 14 years ago

TI__Expert 3540 points

The data lines used are: VP_DIN[11:0]. This is documented in the "Raw Capture Mode Signals" section of the VPIF User's Guide for the device you're using.

0 William Shaffer over 14 years ago in reply to Clay Turner

Intellectual 335 points

Clay,

Thanks for the answer, but that was not exaclty what I was asking. I understand that VP_DIN[11:0] is used...but if you configure the VPIN to use 8 bit data, does this processor use VP_DIN[7:0] or VP_DIN[9:2]?

0 tlee over 14 years ago in reply to William Shaffer

TI__Guru 62975 points

William,

The video ports have different architectures between the two devices. For OMAPL138/C6748/AM18x you would start with VP_DIN[0] for all of the different pixel sizes.

-Tommy

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OMAP-L138/C6748/AM1808 VPIF Bus Alignment