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DS90UB953A-Q1: DS90UB953A-Q1

Jay J
Prodigy 60 points
Part Number: DS90UB953A-Q1

Hi,

In DS90UB953A-Q1 datasheet, 

  1. Section 7.7.87-> What does CNTRL_ERR_HSRQST_CK0 error mean? When does it get asserted?
  2. Section 7.7.88-> Does this refer to datatype? If yes, I have multiple datatype in one frame so which data type gets reflected in this register
  3. Section 7.7.84-> LINE_LEN_MISMATCH -> is asserted when the amount of data received is less. similarly do we have an error indication when number of pixels received is more
  4. Do we have option to set line rate/resolution, framerate via register settings for the serializer?

  • 0
    TI__Mastermind 28380 points

    Hi Jay,

    1. See Section 7.3.1.1 in the datasheet. During normal operation, the CSI-2 receiver can operate in either Control Mode (LP Mode) or High-Speed (HS) Mode. The CSI-2 Receiver needs to receive a specific sequence at each data and clock lane, in order to transition to HS Mode and start receiving video data (LP-11, LP-01, LP-00). And then it will continue to operate in HS Mode, until a stop state is inputted again (LP11). The CNTRL_ERR_HSRQST_CK0 error bit is flagged when the incorrect sequence is initiated at the CSI CLK pins and the receiver is unable to enter HS Mode. For example, when LP-01 does not transition to LP-00.
    2. Register 0x61 shows a portion of the CSI-2 Packet Header data from the Long Packet (VC/Data ID). It contains the VC-ID and data-type of the long packet that is being transmitted within a frame. It shows data type of each long packet and not over the entire frame.
    3. The 953A does not have an error indicator when more pixels are being received. LINE_LEN_MISMATCH is a part of the CSI-2 Receiver Status and is used to check if data has been lost when transferred from the image sensor to the serializer device. There aren't any circumstances where more data would be added over the CSI-2 Rx interface connection between the image sensor and the 953A.
    4. The FPD-Link devices are bridge devices, which offer high-speed transmission of video data over a single STP/COAX cable. Video data can be checked for errors before/after transmission and can be used to aggregate multiple video streams into a single output port. But they do not have features that can modify the resolution or frame rate of the connected image sensor's video data. This can only be achieved by configuring the imager's settings or feeding the video data to an external FPGA, before sending the video data over the FPD-Link transmission line.

    Best,

    Justin Phan