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Original question:

LMK61PD0A2: Unable to get output from SPI lines of Reference Pro of LMK61PDOA2 used along with LMX2595EVM.

LMK61PD0A2: Unable to get output from SPI lines of Reference Pro of LMK61PDOA2 used along with LMX2595EVM.

Anand P
Prodigy 140 points
Part Number: LMK61PD0A2
Other Parts Discussed in Thread: LMX2595, LMX2595EVM, USB2ANY

Tool/software:

Hello, 

We are currently working with the LMX2595 Evaluation Board and using the LMK61PD0A2 as the reference clock source. However, we are encountering an issue where the SPI clock necessary for programming the LMX2595 is not present.

It appears that the SPI clock from the LMK61PD0A2 is not being generated or is not reaching the synthesizer board, resulting in a failure to program the LMX2595.

Could you please advise on how to make the clock output from the LMK61PD0A2? Any suggestions or guidance to help resolve this issue would be greatly appreciated.. 

  • 0
    TI__Genius 12140 points

    Hi, 

    Can you explain what frequency you are trying to generate from LMK61? The SPI clock should be generated from the SPI host (ex: external USB2ANY dongle). LMK61 can be used to generate the clean clock source to the OSCin input of the LMX2595EVM. 

    Regards, 

    Connor