USB suspend mode behaviour RT1050

[massimoincerti]

Hi,

here the info I would like to understand regarding USB on RT1050:

- USB used as device: Power consumption requested is less than 1.5 ms and the wakeup from Suspend mode should be lessa than 10 ms. Is the RT105x USb supporting these features?

- Is there an internal pull-up on the D+ line on the USB IP?

- Is there any possibility to implement the remote wake-up from the device (RT105x) to the host?

Thanks and best regards

[CarlosCasillas]

Hi Massimo,
For low power operation on i.MX RT, you could refer to application notes AN12094 and AN12085 at the following links:
https://www.nxp.com/docs/en/application-note/AN12094.pdf

https://www.nxp.com/docs/en/application-note/AN12085.pdf

Regarding pull up on D+ pin, yes, it is internally included as part of the USB Full/High speed Devices.
For Remote Wakeup functionality, the RT supports remote wakeup and also sending the wakeup signal to a Host. Please refer to the usb_examples->dev_resume_suspend examples of MCUXpresso SDK for i.MXRT (I have attached the readme document from one of these examples).

Hope this will be useful for you.
Best regards!
/Carlos
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