Hi Team,
Currently my customer finds that the LMK04828 fail to indicate the un-lock status. Can you help to check the reason? Thank you.
They are only using the PLL2. The LMK04828’s OSCin is from LMK00304 output. When we disable LMK00304 output, the LMK04828 should indicate that the PLL is unlocked. But sometimes the LMK04828 doesn’t indicate the un-lock status. In this case, we tried two ways to let the LMK04828 to indicate the unlock status:
1. we use a oscilloscope to probe the LMK04828’s OSCin’s pin, the device indicates the unlock status.
2. The device’s reg 0x140 is set to 0x80 before. Set the 0x140=0x90 manually -> some LMK04828 indicates the un-lock status -> Read back the 0x140 register 0 -> Some devices indicate the un-lock status, and some don’t.
Seems that the un-lock indicate needs some trigger action to act normally. Can you help to give some advice?