DS90UB954-Q1: About AC characteristic measurement

Masaru Oinaga

Part Number: DS90UB954-Q1

Hello, Team,

Could you please tell us the difference of "TD-TERM-EN" and "THS-PREPARE" in terms of waveform observation point?

Our customer is now evaluating AC timing of MIPI-CSI.
"TD-TERM-EN" and "THS-PREPARE" have a different specification (with different min/max value), but it seems to be showing the same period in the timing diagram:

Could you help us here by giving us instructions so that they could capture the correct waveform?

Best,

Masaru

over 3 years ago

0 Shruti More over 3 years ago

TI__Expert 6345 points

Hello Masaru,

TD-TERM-EN, is the time for the data lane receiver to enable the HS line termination, starting from the time point when Dn crosses VIL,MAX.

THS-PREPARE, is the time to drive LP-00 before starting the HS transmission on a Data Lane.

In the diagram, "TD-TERM-EN," should be shorter than "THS-PREPARE." It should be the following:

Which waveform(s) are you trying to observe?

Thank you,

Best Regards,

Shruti

0 Masaru Oinaga over 3 years ago in reply to Shruti More

TI__Expert 4425 points

Hi, Shruti,

Thanks for the explanation.
They were looking for THS-PREPARE, so your information is sufficient.

Best,

Masaru

0 Shruti More over 3 years ago in reply to Masaru Oinaga

TI__Expert 6345 points

Hello Masaru,

You are welcome. Glad the information helped.

Best,

Shruti

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DS90UB954-Q1: About AC characteristic measurement