USB_OTG_HS grayed out for STM32U595VJT6

[bartosz_]

Hey!

I'm trying to get USB up and running on a STM32U595VJT6. From the reference manual, it says it's supported.

 

However, when in STM32CubeMX, the USB_OTG_HS is grayed out.

This is on a fresh project, so there's no pin conflicts or similar.

This is how it looks:

 

Do you have any ideas what the problem might be?

 

[mƎALLEm]

Hello,

This is what the pop up is saying:

You need to Select HSE as source clock.

So go to RCC and enable HSE. USB_OTG_HS will appear.

 

[bartosz_]

Thank you!

How did you get that to pop up? I'm having problems not getting any of these messages on mac.

 

As for RCC, what settings would be correct?

I currently enabled 'Crystal/Ceramic Resonator'. Does that mean we should use an extenral crystal (we have one connected to the mcu), or do I need to set anything else?

[mƎALLEm]

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@bartosz_ wrote:

Thank you!

How did you get that to pop up? I'm having problems not getting any of these messages on mac.

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I don't know for Mac, I have windows but I assume it's the same thing. Pass the mouse over the USB_OTG_HS link:

Here:

 

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@bartosz_ wrote:

As for RCC, what settings would be correct?

I currently enabled 'Crystal/Ceramic Resonator'. Does that mean we should use an external crystal (we have one connected to the mcu), or do I need to set anything else?

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Yes. for USB you need any of the external accurate clock sources either with an external crystal or using a crystal oscillator (XO) or another source using Bypass mode.