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DS90UB954-Q1: CSI-2 Line count

Part Number: DS90UB954-Q1

Hi team,

My customer is evaluating the 953-954 system but the MCU has not been able to capture the DES CSI-2 output.

A CSI-2 error is detected because 0x4E [3] is 1, but 0x54 is 0, and the content of the CSI-2 error is unknown.

There is no problem with PASS or LOCK.

The image size output by the video input side is 1280x800 (YUV422 16 bit / pix), the LINE_COUNT of 0x73 / 0x74 indicates 799 (expected value is 800).

LINE_LEN of 0x75 / 0x76 is as expected with 2560.

It is thought that the fact that this line count does not meet the expected value is affecting the inability to capture images.

Is there any reason why the line count does not match the expected value?

Best regards,

Tomoaki Yoshida

  • Yoshida,
    it sounds the first line is discarded in your case. please make sure the FV/LV timing from the sensor is matched with 954's FV/LV setting. Also, you can disable the discarding setting if needed but anyway you need make sure the FV/LV timing spec. in sensor to catch 954's need.

    regards
    Steven