DS90UB948-Q1: Can 948's TX terminal OLDI enable SSCG?

Alan Xia

Part Number: DS90UB948-Q1

Hi team，

The customer is currently using 941-948, and they want to configure SSCG on the TX side of 948. However, they do not see any related functions in the Datasheet. May I ask if 948 supports SSCG?

over 2 years ago

0 Alan Xia over 2 years ago

TI__Genius 9840 points

Customer's requirement: Spread frequency 1% at output CLK1 and CLK2 of 948.

+1 Cameron Hoholik-Carlson over 2 years ago in reply to Alan Xia

TI__Expert 4196 points

Hi Alan,

The 948 does not support SSCG on its TX side. Typically speaking, only devices with LVCMOS outputs use SSCG in order to reduce interference from its single ended signals.

Please let me know if you have any additional questions.

Best,

Cameron Carlson

0 Alan Xia over 2 years ago in reply to Cameron Hoholik-Carlson

TI__Genius 9840 points

Hi Cameron，

Thanks for your help！

If the input DSI of the 941 is spread-spectrum, is the output of the 948 also the corresponding spread-spectrum CLK?

0 Cameron Hoholik-Carlson over 2 years ago in reply to Alan Xia

TI__Expert 4196 points

Hi Alan,

No problem, happy to help.

Even if the 941 has SSCG turned on, the output of the 948 still wouldn't support it on its output as it has its own CDR.

Let me know if you have any other questions.

Best,

Cameron Carlson

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DS90UB948-Q1: Can 948's TX terminal OLDI enable SSCG?