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LMK04832: R364, R365 and R366

Taketo Sato
Genius 10325 points
Part Number: LMK04832

Hello team,

I have a question on LMK04832's register.

There are R364, R365 and R366 registers in TICS Pro, however in its datasheet, table 5 shows only R364 and 8.6.2.8 shows information of only R366.

Could you clarify what these registers are?

Best regards,

  • 0
    TI__Genius 12560 points

    Hi Sato-san,

    R364 and R365 registers have the fixed settings for PLL2 loop filter internal components values and remaining loop filter components would be added based on loop filter settings (PLLatinum sim tool).

    R366 register field self explanatory from table 77.

    Thanks!

    Regards,

    Ajeet Pal

  • 0 in reply to Ajeet Pal
    TI__Genius 10325 points

    Hello Ajeet-san,

    Thank you for your comment.

    Ajeet Pal said:
    R364 and R365 registers have the fixed settings for PLL2 loop filter internal components values and remaining loop filter components would be added based on loop filter settings (PLLatinum sim tool).

    TICS Pro shows R364 and R365 values are both 0.

    Do you mean filter setting made by PLLatinum sim tool may change R364 and R365 setting value?

    Best regards,

  • 0 in reply to Taketo Sato
    TI__Genius 12560 points

    Hi Sato-san,

    The default settings of the R364 and R365 in TICS Pro defines the fixed internal loop filter component values.

    Pllatinum sim tool optimized the external loop filter component values only.

    Thanks!

    Regards,

    Ajeet Pal

  • 0 in reply to Ajeet Pal
    TI__Genius 10325 points

    Hello Ajeet-san,

    Thank you for further explanation. Since TICS Pro has 0 values on R364 and R365, this 0 setting of the registers set internal loop filter to C1i=60pF, R3=2400 ohm, C3=50pF, R4=200 ohm and C4=10pF, correct?

    So we should write 0 to the registers and shouldn't modify them from 0, correct?

    Best regards,

  • +1 in reply to Taketo Sato
    TI__Genius 12560 points

    Hi Sato-san,

    Yes, that's correct. These registers should be default write values to 0.

    Thanks!

    Regards,
    Ajeet Pal