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DS125DF410: The DS125DF410 dos not work correct

luoqi

Prodigy 70 points

Part Number: DS125DF410

Hello I reference to DS125DF410 Programming Guide page 7 to initial the chip(the step 4 I select the 6.25Gbps parameter [2f,a6,f0]) the chip's input is a 6.26Gbps signal. I can see the eye diagram on input lines, but i can not see the eye diagram on output line. I also test the 10.3125Gbps signal, the resualt of this is same to 6.25Gbps signal

Please provide a chip initial step to help me.

Thanks!!!

over 6 years ago

0 luoqi over 6 years ago

Prodigy 70 points

This is input signal

This is output signal from chip

0 luoqi over 6 years ago in reply to luoqi

Prodigy 70 points

This is input signal eye diagram:

and this is output signal from ds125df410 eye diagram :

0 Lee Sledjeski over 6 years ago in reply to luoqi

TI__Mastermind 43795 points

Hi,

The input datarate does look like 6.25 Gbps. Setting the register at 0x2F is also correct.

Please upload a complete set of the register values so we can provide additional guidence on this application.

Best Regards,

Lee

0 luoqi over 6 years ago in reply to Lee Sledjeski

Prodigy 70 points

Thanks

I set the register at 0x2f correct and realse the CDR, but this problem had no improvement.

0 Lee Sledjeski over 6 years ago in reply to luoqi

TI__Mastermind 43795 points

Please send the values for all the device registers so it is easier to understand what may be wrong in your system.

Regards,

Lee