DS90UB948-Q1: RXINO+ and RXIN0- waveform review

Shubiao Wang

Intellectual 1490 points

Part Number: DS90UB948-Q1

Hi,

The RXIN0+ single end signal seems to be not stable.

The RXIN0+/ and RXIN0- differential signal waveform has an obvious ac oscillation on it.

Do the two waveforms work normally?

What is the reason for the instability?

Best regards,

Shubiao

over 5 years ago

0 Casey McCrea over 5 years ago

TI__Guru** 103215 points

Hello Shubiao,

This is normal because the FPD-Link channel is bidirectional and contains both low frequency back channel + high frequency forward channel signals together on the same conductor. You can see more information about the basics of the FPD-Link protocol here:

Best Regards,

Casey

0 Shubiao Wang over 5 years ago in reply to Casey McCrea

TI__Intellectual 1490 points

Thanks Casey

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DS90UB948-Q1: RXINO+ and RXIN0- waveform review