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LMK5C33216: Generating 25MHz LVDS Output Using TICS Pro GUI

Evelyn Chao
Prodigy 10 points
Part Number: LMK5C33216


Tool/software:

I have a custom board that uses the LMK5C33216 clock synchronizer. I'm trying to send simple commands (generated by TICS Pro) using an Analog Discovery via 4-wire SPI. I want to use a 48MHz XO source and the DPLL1/APLL1 functionalities to generate a simple 25MHz LVDS output on CH0.

What are the recommended settings and parameters in the TICS Pro GUI to achieve this in the most simplest form?

  • 0
    TI__Intellectual 1250 points

    Hello Evelyn,

    I have a few questions in order to create a TICSPRO configuration.

    If you are using the DPLL what is the input reference frequency?
    Also is this for the A or non A version (LMK5C33216 or LMK5C33216A)?

    As for the recommended settings, on the Start page enter your XO frequency, enter your DPLL reference frequency inputs, select the DPLL1 check box to use, select the reference used for the DPLL, change the APLL1 reference to be sourced from XO. Also make sure to change the output format and frequency in step 6. After running through the output buttons and running the DPLL1 Run script it will configure the device.

    Best Regards, 
    Kyle Yamabe

  • 0 in reply to Kyle Yamabe
    Prodigy 10 points

    The input reference REF0 frequency is 10MHz. This is for the non-A version (LMK5C33216).

    I'm programming the device using an Analog Discovery, so I am copying the commands generated in the "Programming" section into a text file to send in Analog Discovery Waveform software. Will all the settings be reflected in the set of commands generated by clicking the "Generate Register Programming Sequence"?

    Thanks,

    Evelyn

  • 0 in reply to Evelyn Chao
    TI__Intellectual 1250 points

    Hello Evelyn,

    Yes using the "Programming Section" will generate the programming sequence needed to program the device.

    Also for communicating with the device please note that it can start up in either I2C or SPI mode depending on the state of the GPIO pins. Please ensure that the correct voltage is supplied to the GPIO pins to have the device start-up in SPI mode.

    Here is a general config given the specifications described. One thing to note is common differences that could cause issues with the config are the interface type for the XO and Reference signals to the LMK5C33216. Please make sure that these are as listed in Ticspro or change the configuration and regenerate the output settings to set it to the desired interfaces.
    25MHz LVDS LMK5C33216 config.tcs
    Best Regards,
    Kyle Yamabe