What to do with unused USB pins on LPC4337?

[thomaslantinga]

I'm creating a design with the LPC4337JET100 where I don't use the USB functionality.

What should I do with the following pins:

• USB0_DP
• USB0_DM
• USB0_VBUS
• USB0_ID
• USB0_RREF
• USB1_DP
• USB1_DM

Can I leave the pins unconnected or should I pull them up or down?

I looked in all the available datasheets and manuals but none of them are telling what to do when not using the USB peripherals.

Kind regards,

Thomas Lantinga

[soledad]

Hello Thomas,

I suggest the below connections. I hope this helps.

• USB0_DP----- unconnected
• USB0_DM---- unconnected
• USB0_VBUS pulled low
• USB0_ID---- unconnected
• USB0_RREF pulled low
• USB1_DP----- unconnected
•   USB1_DM---- unconnected

Have a great day,
Sol

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[xianduidong]

Config them to general IO mode and treat them as IO pins.

[thomaslantinga]

The pins I mentioned above are dedicated USB pins. I can't configure them as GPIO.