topic Re: IMRT1046 USB Host connection in MCX Microcontrollers

IMRT1046 USB Host connection

JACOBTHOMAS_007 — Sun, 13 Jul 2025 04:16:52 GMT

I couldn't find the USB_OTG1_ID pin in MIMXRT1046XFQ5B processor, does that means by default the USB controller behaves as HOST? We are using this processor to build a custom USB host to get data from other USB devices.

Re: IMRT1046 USB Host connection

mayliu1 — Mon, 14 Jul 2025 09:07:03 GMT

Hi @JACOBTHOMAS_007 ,

Thank you so much for your interest in our products and for using our community.

Yes, There is no USB_OTG1_ID pin in MIMXRT1046XFQ5B processor USB peripheral , However, you can use other Chip IO to realize the function.

The USB in MIMXRT1046XFQ5B processor still support Host or Device mode.

I suggest you can refer to MIMXRT1046-EVK design.

https://www.nxp.com/search?keyword=rt1046&start=0

Wish it helps you.
If you still have question about it, please kindly let me know.

Wish you a nice day!

Best Regards
MayLiu

Re: IMRT1046 USB Host connection

JACOBTHOMAS_007 — Mon, 14 Jul 2025 10:12:32 GMT

Thanks for the reply,

From the EVK design files I see it uses a CC logic IC PTN5150A, but if I want the MIMXRT1046XFQ5B to only behave as host can I exclude using this IC? and then by default does the MCU MIMXRT1046XFQ5B USB Mode is HOST?

Re: IMRT1046 USB Host connection

mayliu1 — Tue, 15 Jul 2025 07:14:34 GMT

Hi @JACOBTHOMAS_007 ,

Thanks for your reply.

Yes, You can choose not to use USB type-C CC logic IC.

When the RT1046 is required to operate only as a USB Host, a direct implementation with a Type-A receptacle is sufficient.

In software, Please explicitly configure the USB role as Host mode.

Please ensure the RT1046 board provides stable VBUS power to the USB port.

Best Regards

MayLiu

Re: IMRT1046 USB Host connection

JACOBTHOMAS_007 — Tue, 15 Jul 2025 07:32:54 GMT

Thank you so much for the clarification!

Re: IMRT1046 USB Host connection

mayliu1 — Tue, 15 Jul 2025 07:38:22 GMT

You are welcome.

If this post answers your question, please click the "Mark Correct" button.

Thank you!

Re: IMRT1046 USB Host connection

JACOBTHOMAS_007 — Tue, 15 Jul 2025 07:40:51 GMT

one more clarification is, if the USB_OTG_OC not connected and left it floating, work for USB host only application?

Re: IMRT1046 USB Host connection

JACOBTHOMAS_007 — Tue, 15 Jul 2025 09:27:14 GMT

Any contacts from where we could buy MIMXRT1046XFQ5B-EVK boards?

Re: IMRT1046 USB Host connection

mayliu1 — Wed, 16 Jul 2025 07:05:41 GMT

Hi @JACOBTHOMAS_007 ,

Thanks for your reply.

Yes, you can left USB_OTG_OC pin floating, and you can also leave this pin uninitialized in the code.

Best Regards

MayLiu

Re: IMRT1046 USB Host connection

JACOBTHOMAS_007 — Wed, 16 Jul 2025 08:12:16 GMT

Thanks!!