MCXA185VLH USB0_DP and USB0_DM Pins Not Highlighted in MCUXpresso Pins Too

[Darvin]

Hi,

   We are currently working with the MCXA185VLH controller and enabling USB0 functionality using MCUXpresso Config Tools.

According to the datasheet, USB0_DM and USB0_DP are assigned to pin 26 and pin 27 respectively (pad type: ANA, IO supply: VDD_USB). However, when USB0 is enabled in the MCUXpresso Pins Tool, these DP and DM pins are not highlighted,Only USB VBUS_DET PIN 22 signal are visible and configurable.

Could you please confirm the following

1. Are USB0_DP and USB0_DM fixed-function analog PHY pins that are automatically connected internally and therefore not shown in the pin mux configuration?

2. Is any additional configuration required in MCUXpresso Config Tools to activate these pins, or are they enabled automatically once USB0 peripheral and PHY are initialized in software?

3. Is there any recommended way to verify correct USB PHY pin activation within the tool?

We want to confirm that our configuration is correct before proceeding with hardware validation.

Thank you for your support.

[carlos_o · Accepted solution]

Hi @Darvin,

Thanks for your post and apologies the delay reply.

Yes, the USB0_DP and USB0_DM are internally connected, that is why in the pinmux table those pins do not have different Pinmux Assignment.

No additional configuration is needed. 

There is not an official recommendation to verify the USB PHY with the tool.

Regarding PCR configuration there is only needed the USB0_VBUS_DET that you are setting.