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Names of CSI-2 lane signals

Peter Gregson
Prodigy 210 points


Hello,

I am designing daughter boards for OV5642 sensors and OV8850 sensors to plug into the Pandaboard.  Omnivision labels the CSI-2 lanes as MCN, MCP, MDN0, MDP0, MDN1, MDP1, MDN2, MDP2, MDN3, MDP3.  The Pandaboard labels the CSI-2 lane signals as CSI21_DXn, CSI21_DYn where n goes from 0 to 4.  My questions are:

1.  Which of the lanes is the clock lane, and

2.  Which of the CSI21_DXn or CSI21_DYn is the positive side of the differential lane pair?

Thanks,

Peter

  • 0
    TI__Guru**** 161600 points

    Hello Peter,

    According to OMAP4460 TRM:

    1. csi21_dx0 & csi21_dy0 are the differential clock input signals. All other signals  csi21_dx1/2/3/4 & csi21_dy1/2/3/4 are the data

    2.  DXn are the positive input signals and DYn are the negative.

    See Table 8-37 ISS I/O Description  in Section 8.2.2.1 ISS Interfaces Signal Descriptions.

    Best Regards,

    Yordan

  • 0 in reply to Yordan Kovachev
    TI__Guru**** 161600 points

    Just a clarification, regarding question 1). Which of the signals are clocks.

    You should refer to Table 8-141. ISS CSI2-A I/O Description in Section 8.2.5.1.1.1 ISS CSI2 Physical Layer of OMAP4460 TRM.

    The dx0/1/2/3 & dy0/1/2/3 pins can be clock or data (depending on your configuration). There is a hw design restriction only for lane 4 (dx4 & dy4), which states: LANE 4 can be used only as a data lane, never as a clock lane

    Best Regards,

    Yordan