We have 3 sorts of AM6548 Board for our customer.
The two sorts of products work well for silicon migration rev2.0 to 2.1
But one product doesn't start.
I checked the hardware. I think the basic problem is WKUP_OSC Crytal.
The waveform is distorted, so I changed crystal to an oscillator.
But, the results are the same.
I think that if WKUP_OSC doesn't work then internal LDO doesn't work.
I checked the CAP_LDO output, there is no output voltage.
How can I debug my board?
Best regards.
Hwang.