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LMK3H0102: Part options and configurations of LMK3H0102

Kalpesh Diyora
Prodigy 170 points
Part Number: LMK3H0102

Tool/software:

Hi TI Team,
We are looking for LMK3H0102 clock generator for PCIe application.

As per the details available, LMK3H0102 have many orderable options including, LMK3H0102V33/18, LMK3H0102A001, LMK3H0102A006, LMK3H0102A014/15/16 etc.
Does LMK3H0102A001, LMK3H0102A006, LMK3H0102A014/15/16 supports I2C interface as well or can be set using OTP mode only? If I2C option is available then what is the default page loaded in I2C mode?

What is major difference between LM3H0102V18 and LM3H0102A001 while operating both with I2C mode?

What is VDD0_0/1 for if we need to configure clock as differential LP-HSCL mode only. Does it only useful for incase if we want to configure LVCMOS clock?

  • 0
    TI__Mastermind 22210 points

    Kalpesh,

    The configuration information for each of the Axxx configurations is detailed in the configuration addendum: https://www.ti.com/lit/ug/snau290/snau290.pdf

    All configurations have I2C available when the REF_CTRL pin is pulled low or floating at startup.

    The LMK3H0102A001 configuration has both outputs disabled on Page 0. Pages 1, 2, & 3 are not similar to the LMK3H0102V18 configuration.

    The VDDO_x can be <= VDD for LP-HCSL. The swing level achieved for 1.8V LP-HCSL vs 3.3V LP-HCSL is specified in the Electrical Characteristics under the section LP-HCSL CLOCK OUTPUT CHARACTERISTICS.

    Thanks,

    Kadeem

  • 0 in reply to Kadeem Samuel
    Prodigy 170 points

    Hi Kadeem,

    Thanks for the response.

    The swing level achieved for 1.8V LP-HCSL vs 3.3V LP-HCSL is same with default value of 755mV in both.

    What is default OTP Page loaded for LMK3H0102A001 in I2C mode?

    I understand the basic difference between the page of LMK3H0102A001 and LMK3H0102V18. but, as all part is I2C controllable. We would like to understand the reason for this part difference. As the all part is I2C controllable and can able to configure the parts using I2C interface so any specific reason for making the different order code LMK3H0102A001, LMK3H0102A006, LMK3H0102A014/15/16?
    The different OTP has been specified for LMK3H0102A006/14/15/16 can be configured using I2C bus. Is this correct understanding?

    Regards,

    Kalpesh

  • 0 in reply to Kalpesh Diyora
    TI__Mastermind 22210 points

    Kalpesh,

    For all configurations OTP Page 0 is loaded when booting the device in I2C mode. The differences between each of these devices is that they do NOT have the same settings at startup. While the registers are configurable after startup, the startup settings are fixed and cannot be overwritten.

    All devices can have their live settings configured after startup in I2C mode. This is not available in OTP mode.

    Thanks,

    Kadeem

  • 0 in reply to Kadeem Samuel
    Prodigy 170 points

    Hi Kadeem,

    What does the below line mean for and for which mode it is? Do you mean the startup setting which has been shown for page 0 cannot be overwritten?


    """ While the registers are configurable     after startup, the startup settings are fixed and cannot be overwritten """

  • 0 in reply to Kalpesh Diyora
    TI__Mastermind 22210 points

    Kalpesh,

    The startup settings device cannot be reprogrammed, as they are one-time programmable. After startup, the registers can be written, but after a power cycle the Page 0 settings will be reloaded.

    Thanks,
    Kadeem