LMK04828: LMK04828 not outputting any clock

Robert Banks

Part Number: LMK04828

Hello,

I am using the TICS PRO software in mode LMK04828B in order to generate the register settings for the LMK04828. Using the settings below, I'm unable to get anything to output. We are using our own board and have an external VCO connected to OSCin. I have verified that the OSCin is correct at 100MHz. I can read and write all registers. Here are my settings.

I exported the register settings from this and then wrote all the registers. Any help will be greatly appreciated.

Thanks,

Robbie

over 7 years ago

0 Puneet Sareen over 7 years ago

TI__Expert 8865 points

Hi Robbie,

The outputs are now working in your configuration because the Output channels stays in SYNC state. After issuing a SYNC, please disable the SYNC for outputs like this and the outputs will start toggling.

Also i noticed that you are using CLKin2 but you have selected LVDS for OSCout format. Please power down OSCout for CLKin2.

Best regards

Puneet

0 Robert Banks over 7 years ago in reply to Puneet Sareen

Intellectual 330 points

Thanks, I came to the same conclusion as you. It is working now.

Thanks,

Robbie

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LMK04828: LMK04828 not outputting any clock