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LMX2595EVM: LMX2595EVM interfacing with external controller

giovanny Mateus
Prodigy 90 points
Part Number: LMX2595EVM
Other Parts Discussed in Thread: LMX2595, , TICSPRO-SW

Im kind of newbie  on this RF Board, whic lead me to some Questions... 

-Is the SYNC input  already wired to the (SyNC and SysRef, Figure 10).

- Addtional Patches to coonect the "DNP" are needed?

-On the case of the  100  MHz-Oscillator:

-Is it Programmable (i2c?)

-is it alredy wired as default  reference, or it should be patched?

-is there any software libraries (*.a , *.c, *.cpp *.py) for getting  started  with this board?

I would appreciate your comments

  • 0
    TI__Genius 11900 points

    Hello Mateus,

    The LMX2595EVM comes with a reference pro board, that has an MSP430 microcontroller on it. This device is used to read/write registers to the LMX2595.

    You can use the TICSPRO-SW GUI to make this process easier. We do not have any software libraries available for this.

    The LMX2595 uses SPI communication protocol and the on-board 100 MHz oscillator is not programmable, it is fixed.

    The SYNC pin is already connected to the header, the oscillator may or may not be enabled by default. The newer builds of this EVM do not come with the oscillator.

    If your board does have the oscillator I expect it to be powered on and oscillating by default. You can double check with by ensuring R24b, R29b, R27, R28, C13 and R33 are populated.

    Thanks,

    Vibhu

  • 0 in reply to Vibhu Vanjari
    Prodigy 90 points

    Hi Vanjari,

    Thanks for your quick answer!

    the reference board would be used at the beginning, but then the LMX2595EVM  should come across alone. that means , for the programing on a external system  should be considered over 100 registers . therefore i wondering,if is posible to get the code on the MSP430.

    About this "The SYNC pin is already connected to the header, the oscillator may or may not be enabled by default. The newer builds of this EVM do not come with the oscillator."

    I would definetely order a LMX2595EVM  with Oscillator included.. How can I be sure that , by ordering, the 100-Mhz XO is already populated?

    Kind Regards 

    Giovanny

  • 0 in reply to giovanny Mateus
    TI__Genius 11900 points

    Hello Giovanny,

    Unfortunately I do not have the code on the MSP430 to share with you. The device uses a SPI interface and the protocol is described in the LMX2595 datasheet. Perhaps you can post on the microcontroller forum to see if the MSP430 team has sample code for a SPI interface.

    giovanny Mateus said:
    I would definetely order a LMX2595EVM  with Oscillator included.. How can I be sure that , by ordering, the 100-Mhz XO is already populated?

    You cannot determine which EVM you get. As of March 2020 the new boards do not have the oscillator populated. The part number is provided in the BOM of the EVM User's Guide and can be ordered separately and soldered on if needed. Alternatively you can also use a compatible oscillator with similar footprint.

    The reference pro board that comes with the EVM has a TI LMK6XXX oscillator that can be used to generate an input clock also.

    Thanks,

    Vibhu