The data sheet only mentions not using both ports:
I'm thinking tie Vreg_IN0 to Vreg_IN1
I would use the USB1 port so I have bus detect. then float USB0_DP and USB0_DM
Vreg_out would have some caps for filtering but otherwise would not be used.
Solved! Go to Solution.
Hi,
There is a Note at K66 chapter 53 USB Voltage Regulator:
When USB is not used in the application, it is recommended to connect VREGOUT and VREG_INx together and tie to ground
through a 10kΩ resistor. Do not tie directly to ground, as this causes a latch-up risk. For systems where only one of the VREG_INx pins is ever used, it is also recommended to connect the two VREG_INx pins together.
Have a great day,
Ma Hui
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Hi,
There is a Note at K66 chapter 53 USB Voltage Regulator:
When USB is not used in the application, it is recommended to connect VREGOUT and VREG_INx together and tie to ground
through a 10kΩ resistor. Do not tie directly to ground, as this causes a latch-up risk. For systems where only one of the VREG_INx pins is ever used, it is also recommended to connect the two VREG_INx pins together.
Have a great day,
Ma Hui
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
I had decided to just tie the two regulator inputs together. It is always good to get verification that design choices are correct!