DS90UB935-Q1: ISP outputs embedded line

Sherry Liang

Part Number: DS90UB935-Q1

Dear team,

My customer wants to know whether our device 935&960 can pass through embedded line?

For example, camera's resolution is 1280*720 which means that line count=720 and line length=1280. In order to achieve functional safety, they need to add one line at the end, and this line's name is embedded line. This line will include some diagnostic information. This line comes from ISP, and this line needs to be passed through to SOC, then SOC analyze the embedded line.

In my understanding, our device can support such passthrough function only if ISP sets line count=721 and SOC sets line count=721 at the same time, right?

Thanks & Best Regards,

Sherry

over 4 years ago

0 Sally Cheung95 over 4 years ago

TI__Expert 5480 points

Hi Sherry,

yes, on the CSI-2 DES side there is a register which lets you specify a special data type for the first N lines of data to accommodate this (0x4B). Or you can send extra lines with the same data type and then just crop those out of the actual image data knowing that they are embedded data not camera image.

Thanks

Sally

0 Sherry Liang over 4 years ago in reply to Sally Cheung95

TI__Genius 10255 points

Hi Sally,

Thanks for your reply!

In the 960 datasheet, I can see 0x4B register. But it said this embedded type has no effect on CSI-2 receiver mode. If we use 935 paired with 960, I have to choose CSI-2 mode, then this register is no use, right?

In this way, I have to the line count=721, right? But I am not sure whether SOC can distinguish the image data and non image data.

Thanks & Best Regards,

Sherry

0 Sally Cheung95 over 4 years ago in reply to Sherry Liang

TI__Expert 5480 points

Hey Sherry,

You are correct. you can send extra lines and then crop it on the SoC. So you can send 1 extra after the 720 active lines and crop it out.

Thanks
Sally

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DS90UB935-Q1: ISP outputs embedded line