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LMH0318: CDR status

Part Number: LMH0318

Good morning

I want to read the CDR status 1 of the LMH0318 reclocker, In the programming guide I found the register CDR_Status_1 in the Reg_0x02 Channel, the it puts that the bits 3 and 4 indicates the status of the CDR but in the point 4.2.9 Lock Data Rate Indication of the same guide says that only the bit 4 indicates if the CDR is locked or not and furthermore use the mask 0x18, when the bit 5 is reserved.


Someone can indicate me which is the correct sequence to read the status of the CDR?

Thank you 

  • Hi Pablo,

    Thanks for your patience and sorry for the delay as we were out for the New Year's holiday.

    Regarding the LMH0318 CDR status, it can be found in Reg 0x02 in Bits 3 and 4. The meaning of the bits in Reg 0x02 are determined by how Reg 0x0C[7:4] are configured.

    • If you set Reg 0x0C[7:4] = 0000'b (default), then Reg 0x02[4:3] will read back the lock status.
    • If you set Reg 0x0C[7:4] = 0011'b, then Reg 0x02[5:3] will read back the data rate that the CDR locked to.

    Thanks,

    Michael