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Original question:

AM620-Q1: SK-AM62-LP Issue CSI-2 I2C Interfacing with OV2311 SCCB Protocol Always reads 0x00 from chip ID (0x300A)

AM620-Q1: Power Supply for CSI-2 Camera (ST-56G3MAI1) on SK-AM62-LP

gopal sharma
Prodigy 240 points
Part Number: AM620-Q1
Other Parts Discussed in Thread: SK-AM62-LP

Tool/software:

Hi Team,

We are using the SK-AM62-LP kit to interface a CSI-2 camera (ST-56G3MAI1). Could you please confirm which supply should be used to drive the camera — VCC_3V3_SYS or VCC_CSI_IO?

We also need to control this supply at runtime ( for suspend, enable, disable, etc. ).

Regards,
Gopal Sharma

  • 0
    TI__Mastermind 22421 points

    Hi,

    Thanks for your patience. Could you please provide additional information on the request? What does "to drive the camera" mean?

    VCC_3V3_SYS is used for VDD/VCC

    VCC_CSI_IO is used for the IO

    Thanks,

    Brenda

  • 0 in reply to Brenda Diaz
    Prodigy 240 points

    Hi Brenda,

    Thank you for your support.

    We need to provide 3.3V power to the camera, and this power should be controlled (on/off) to allow suspend or stop modes for power saving.

    On the CSI-2 connector, two voltage rails are available: VCC_3V3_SYS and VCC_CSI_IO.


    From my understanding, VCC_3V3_SYS is also used to drive other peripherals or the SoC, so controlling it may not be feasible. Therefore, only VCC_CSI_IO seems specific to the camera.

    Could you please confirm if VCC_CSI_IO is the preferred option to power the camera?

    Best regards,
    Gopal Sharma

  • +1 in reply to gopal sharma
    TI__Mastermind 22421 points

    Hi,

    VCC_CSI_IO is used for the IO. This rail outputs 1.8V at startup and not 3.3V

    VCC_3V3_SYS is the only 3.3V VDD supply that goes to the camera connector and is only turned-OFF during "Partial IO" low power mode. If your application requires turning OFF this rail for CSI during specific scenarios, then I would recommend adding a power switch between VCC_3V3_SYS and the camera. 

    Note: customers are responsible for protecting IOs that are not fail safe. Make sure voltage is not applied to an IO without having a valid voltage on the corresponding IO supply pin.  

    Thanks,

    Brenda