Hi,
DS90UB954-Q1 datasheet has described the power up sequence, but I can't understand very well. So I want to know whether VDD18 and VDDIO should be powered up simultaneously?
Thank you.
Best Regards.
Gavin.
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Hi,
DS90UB954-Q1 datasheet has described the power up sequence, but I can't understand very well. So I want to know whether VDD18 and VDDIO should be powered up simultaneously?
Thank you.
Best Regards.
Gavin.
Hello Gavin,
If the VDDIO is 1.8V, then the VDD18 and VDDIO should ramp together. If the VDDIO is 3.3V, then you should ramp in this order:
VDDIO33 -> VDD18 -> VDD11
Best Regards,
Casey