DS90UB941AS-Q1: dual link mde cable difference

Ryan Wang

Part Number: DS90UB941AS-Q1

Dear expert,

For dual link mode, is there any requirement for signal latency difference through two cable? For example, one cable is 5m, another cable is 10m. Is it OK?

over 3 years ago

0 Casey McCrea over 3 years ago

TI__Guru** 103215 points

Hello Ryan,

For dual link mode the two cables should be part of the same assembly and should be the same length. For independent operation where the two FPD ports go to separate deserializers there is no length matching requirement between DOUT0 and DOUT1

Best Regards,

Casey

0 Ryan Wang over 3 years ago in reply to Casey McCrea

TI__Expert 7435 points

Casey,

For dual link mode to the same deserializer, what is the max length difference can tolerate?

Thanks

0 Casey McCrea over 3 years ago in reply to Ryan Wang

TI__Guru** 103215 points

Hello Ryan,

For dual link mode the max pair to pair skew is 1 PCLK cycle. So for example if the pixel clock is 148.5MHz, the max prop delay difference should be ~6.7ns based on the electrical prop delay through the cable.

Best Regards,

Casey

0 Ryan Wang over 3 years ago in reply to Casey McCrea

TI__Expert 7435 points

Casey,

Great thanks

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DS90UB941AS-Q1: dual link mde cable difference