LMK03318: Reference oscillator present during NVM programming

Jordan Smith

Part Number: LMK03318

We have seen issues before using the LMK03318 evaluation board whereby certain registers cannot be successfully programmed to non-volatile memory while there is a reference oscillator present. Is there any requirement to disable the reference input during programming of the NVM?

In the cases where it fails to write registers, it is specifically the N-counter register when we try to program it to 250, with an R-counter of 1. Writing to the volatile memory works fine, but the setting cannot be committed to NVM unless the input reference is disabled. We do not get any issue with N-counter of 1000, R-counter of 4. When doing this through the GUI, it does not give any errors, but on power cycle the N-counter register particular register appears to have not been programmed.

Thanks

over 4 years ago

0 Julian Hagedorn over 4 years ago

TI__Mastermind 20900 points

Hi Jordan,

I will need to check this internally. I come back to you as soon I have more details.

Regards,

Julian

0 Jordan Smith over 4 years ago in reply to Julian Hagedorn

Prodigy 215 points

Thanks Julian - was there any update?

0 Hao Z over 4 years ago in reply to Jordan Smith

TI__Mastermind 18070 points

Hi Jordan,

Sorry for the delay. I don't believe that the reference clock needs to be removed before EEPROM can be successfully written. However, the LMK03318 Ticspro can sometimes fail to write to the EEPROM in which case you'll have to write again. Can you confirm if you are writing the EEPROM through Ticspro or using your own codes? You said "certain registers" can you confirm that the failure is only limited to those registers?

Regards,
Hao

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LMK03318: Reference oscillator present during NVM programming