DS125DF111: Read locked VCO Divide Value

Don Schelle

Part Number: DS125DF111
Other Parts Discussed in Thread: DS110DF111

Hello,

Once the DS125DF111 is locked to an incoming signal, we'd like to know what the data-rate of said signal is. I suspect you can read register 0x18h [6:4] to get the divide ratio. Is that correct?

Don

over 8 years ago

0 Don Schelle over 8 years ago

TI__Expert 4150 points

Hello,

This question is still open.

Don

0 Lee Sledjeski over 8 years ago in reply to Don Schelle

TI__Mastermind 43795 points

Hi Don,

The DS125DF111 or DS110DF111 can provide the current locked VCO divide ratio with the following register configuration.

Write Channel Register 0x0C = 38'h. This changes the definition of Register 0x02.

Read Channel Register 0x02.

VCO divide by 1 => 0x02[2:0] = 000'b

VCO divide by 2 => 0x02[2:0] = 001'b

VCO divide by 4 => 0x02[2:0] = 010'b

VCO divide by 8 => 0x02[2:0] = 011'b

Regards,

Lee

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DS125DF111: Read locked VCO Divide Value