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LMK04808: LMK04808 periodic unlock

Sunny Qin
Expert 4890 points
Part Number: LMK04808
Other Parts Discussed in Thread: CODELOADER

hi team,

we meet LMK04808 periodic unlock problem, it`s unlock every 5~10 minute, the SCH is the same with EVM, and configuration is as below:

is there any configuration problem?

or do you have any suggestion on periodic unlock problem?

Thanks very much.

Regards, Sunny

  • 0
    TI__Mastermind 28550 points
    How do you know the device is unlocked? Assuming the LD_MUX output...
    Is it PLL1 or PLL2 which becomes unlocked? Set LD_MUX = PLL1 DLD and HOLDOVER_MUX = PLL2 DLD to determine which PLL is having unlock issue.

    What does the reference look like? Does the reference have an issue which would result in unlock? Could you try another reference?

    Can you upload the .mac file of the codeloader configuration?

    73,
    Timothy