USB HOST on iMX RT1170

[leonardoprates]

I wanna use one of USB OTG of iMX RT1170 as HOST only. Is mandatory to use USB_OTG_PWR and USB_OTG_ID dedicated pins? Can I use others to do this functions? Microcontroller needs to have control over USB_OTG_VBUS input or this can be left directly connected? Is mandatory to have GND at USB_OTG_ID dedicated pin?

Are there some host only schematic to help to understanding the better way to connect?

Thank you,

Leonardo

[jingpan · Accepted solution]

Hi @leonardoprates ,

 USB_OTG_PWR is actually not connected in the EVK. 

When USB is not plug in or a host is plug in, the USB_OTG_ID is high. When USB device is plug in, the USB_OTG_ID is low so that NX5P3090UK supply 5V to VBUS and then to the device.

USB_OTG_ID is not a must if you only use it as a host. USB controller can detect plug in by D+/D- line.

Regards,

Jing