DS125DF410 - SMBus communication without REFCLK 25MHz

Kawai

Guru 19785 points

Other Parts Discussed in Thread: DS125DF410

Hi Team,

Please allow me to confirm if registers of DS125DF410 are accessible through SMBus when REFCLK=25MHz is not applied. There may be some time when REFCLK is not applied from the FPGA during system power up.

Best Regards,
Kawai

over 9 years ago

0 Lee Sledjeski over 9 years ago

TI__Mastermind 43795 points

Hi Kawai,

The 25 MHz REFCLK is not required to access the SMBus registers. The 25 MHz clock is used as a reference for the VCO to achieve fast and accurate locking to the input data.

Regards,

Lee

0 Kawai over 9 years ago in reply to Lee Sledjeski

Guru 19785 points

Hi Lee-san,

Thank you for the answer.
I believe, the CDR will not LOCK if REFCLK is not applied to the device.

Best Regards,
Kawai

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DS125DF410 - SMBus communication without REFCLK 25MHz