DS90UB954-Q1: DS90UB954 transmitted image pixel has only green value

user6259789

Part Number: DS90UB954-Q1

Hi team,

We are using DS90UB954 to deserialize DS90UB933, DS90UB933 receive data format is YUV422 8Bit(UYVY). Now both Lock and Pass of DS90UB954 are high level, 0x5b register(SER_ID) can also read to 0xB0,register RX_FREQ、LINE_COUNT、LINE_LEN all match the actual image. But on the display side the image is only green. Is there something wrong with the configuration of our DS90UB954?

Best regards,

Alec Li

over 5 years ago

0 Casey McCrea over 5 years ago

TI__Guru** 103215 points

Hello Alec,

YUV422 8 bit uses the pixel packing structure of RAW8 so you will want to ensure 954 is set to RAW10 mode and then use register 0x7C[7:6] to enable 8 bit processing. Make sure to match the upper/lower setting so it corresponds with how the 933 inputs are used from the imager.

Also you will want to change register 0x70[5:0] to match the CSI-2 format for YUV422 8 bit which is 0x1E

Best Regards,

Casey

0 user6259789 over 5 years ago in reply to Casey McCrea

Prodigy 230 points

Hi Casey，

Thanks for your reply。I have configured all the registers you mentioned, but problems remain. Are there any other places that need to be configured, or take a look at other chip configurations.

Best regards,

Alec Li

0 Casey McCrea over 5 years ago in reply to user6259789

TI__Guru** 103215 points

Hello Alec,

If you have programmed those items and you are getting correct line length/byte count then I would suggest checking the downstream device to see if there is an issue with interpreting the data format since it does not seem related to the FPD-Link SERDES.

Best Regards,

Casey

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DS90UB954-Q1: DS90UB954 transmitted image pixel has only green value