DS90UB954-Q1EVM: DS90UB953 + OV2775

Yuly Paredes Acuna

Part Number: DS90UB954-Q1EVM
Other Parts Discussed in Thread: ALP

Hello

I am using the 954/953 system with the OV2775 image sensor, when I connect it with the 954 the ALP interface gives me the following result

The sensor is supposed to have 1920x1080 format, I am using a script provided by OV. The wrong horizontal value could be an error inthe FPD link?

Thank you!

over 6 years ago

0 Hamzeh Jaradat over 6 years ago

TI__Guru* 91200 points

Hello Yuly,

this is not an error in the FPD-Link, it is just another form.

you are expecting 1920 pixel columns x 1080 pixel lines, but here it is displayed as 2880 bytes x 1080 pixel lines. You can devide 2880 bytes/1.5 = 1920 pixel columns.

0 Yuly Paredes Acuna over 6 years ago in reply to Hamzeh Jaradat

TI__Prodigy 195 points

Thank you! Why is it divided by 1.5?

0 Hamzeh Jaradat over 6 years ago in reply to Yuly Paredes Acuna

TI__Guru* 91200 points

This is depending on the datatype of the video being sent by the imager. The sizes are defined in the Mipi CSI-2 specification. For example: RGB888 requires a 3-byte block size which is the same as the pixel size.
RAW10 requires a 5-byte block size which is equal to 4 pixels.
RAW12 requires a 3-byte block size which is equal to 2 pixels.

It looks like your imager is sending RAW12, so 3/2 is the relation between bytes to pixels.

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DS90UB954-Q1EVM: DS90UB953 + OV2775