DS90UB954-Q1: How to output pseudorandom data on CSI-2 lanes?

Christopher Buck24

Part Number: DS90UB954-Q1
Other Parts Discussed in Thread: DS90UB953-Q1

Hi, I'm trying to qualify our CSI-2 links out of the DS90UB954-Q1 by capturing the eye diagrams on each lane. I would like to have the CSI-2 outputs enter high speed mode and then transmit arbitrary pseudorarndom data continuously.

Is it possible to configure the DS90UB954 to output the pseudorandom data it receives via RX port 0 via a connected DS90UB953-Q1 when in BIST mode?
Can the CSI-2 pattern generator be configured to output pseudorandom data?
Failing these two options, what is the closest we can get to generating a 100% duty cycle pseudorandom pattern on the CSI-2 outputs?

Thank you,

Christopher

over 5 years ago

0 Casey McCrea over 5 years ago

TI__Guru** 103215 points

Hello Christopher,

Thanks for reaching out. This question has already been answered here: https://e2e.ti.com/support/interface/f/138/t/823720

Best Regards,

Casey

0 Christopher Buck24 over 5 years ago in reply to Casey McCrea

Intellectual 455 points

Hi Casey,

That worked like a charm. Thank you for your help!

May I suggest TI adds this information to the datasheet so myself or others may be able to find this functionality in the future? Currently the datasheet just lists that whole register as reserved:

Sincerely,
Christopher

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DS90UB954-Q1: How to output pseudorandom data on CSI-2 lanes?