DS110DF410: how to know the actual data rate

Miranda Gu

Genius 15047 points

Part Number: DS110DF410

Hi team,

My customers are using DS110DF410 ethernet mode. The 10G and 1G data rates are switching automatically.

My customers wonder the device actual data rate, 10G or 1G? So which register can tell the info?

over 2 years ago

0 Kia Rahbar over 2 years ago

TI__Expert 8585 points

Hello Miranda,

By setting register 0x2f, bits 7:4, to 4'b0000, the DS110DF410 will automatically set its divider ratio and its coarse VCO tuning setting to lock to either a 10 GbE signal (at 10.3125 Gb/s) or a 1 GbE signal (at 1.25 Gb/s) at its input.

To run the device at 10GbE, your input rate should be 10.3125 Gbps. To run the device at 1Gbe, the input signal should be 1.25 Gbps.

Regards,

Kia Rahbar

0 Miranda Gu over 2 years ago in reply to Kia Rahbar

TI__Genius 15047 points

Hi Kia,

My customers found CDR unlocked issue when data rate switched from 10GbE to 1GbE. They didn't change the register setting, only change the input signal frequency. The register dump is attached. Could you please take a look? What cause it?

ch1_OK_10GbE.cfg ch1_NG (changed to 1GbE).cfg

0 Miranda Gu over 2 years ago in reply to Miranda Gu

TI__Genius 15047 points

Add one more info: when the issue occurred, if they reset CDR, the CDR became locked.

0 Kia Rahbar over 2 years ago in reply to Miranda Gu

TI__Expert 8585 points

Hello Miranda,

The register settings are correct.

The CDR remains unlocked when you switch data rates until you reset the CDR. If you don't reset the CDR, it will continue to attempt locking to the previous data rate.

Therefore, every time you switch the input data rate from 10GbE to 1GbE, you should reset the CDR.

Regards,

Kia Rahbar

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DS110DF410: how to know the actual data rate