USB questions for i.MX8M Mini

[jimmyli]

Hi,

     I have some questions about USB design for i.MX8M Mini.

     Questions:

     1. What is the different function between USB1_OTG_ID and USB1_P1_ID ?  --《i.MX8M Mini Reference Manual》/P1263

     2. Can we read the status register for USBx_ID and USBx_VBUS ?

         Or, can we take USBx_ID and USBx_VBUS as GPIO that we can set them to generate interrupt ?

    3. In i.MX8M Mini demo schematic, we find USBx_OTG_ID、USBx_OTG_OC、USBx_OTG_PWR are not used, is that OK for USB2.0 OTG ?

    Thanks.

[Ken5]

Hi Weidong, 

       We use USBx_ID instead of USBx_OTG_ID, i known need to configure the register IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO10 and IOMUXC_SW_MUX_CTL_PAD_GPIO1_IO11, but in detail i don't kown how do it, for imx8mini-evk. Can you share me some example and what is the dts file should be?

[weidong_sun]

Hi Jimmy,

See below, please!

1. What is the different function between USB1_OTG_ID and USB1_P1_ID ? 

USB1 has 2 IDs, one is USB1_OTG_ID, which is called GPIO ID. The other is USB1_ID, which is phy ID.

2. Can we read the status register for USBx_ID and USBx_VBUS ?

Yes.

>>can we take USBx_ID and USBx_VBUS as GPIO that we can set them to generate interrupt ?

No.

3.3. In i.MX8M Mini demo schematic, we find USBx_OTG_ID、USBx_OTG_OC、USBx_OTG_PWR are not used, is that OK for USB2.0 OTG ?

I drew a schematic for you as reference. it will be sent to your email, check it, please!

Have a nice day!

B.R,

Weidong

[937556508]

Hi weidong,

I now design a USB circuit using i.MX8M Mini，USB2 as OTG, USB1 as slave, can you give me some design reference or suggestion.

In addition, on the development board, I can't use the USB1 port as a slave. I think this is the download interface of i.MX8M Mini with USB1,is right?

Best wishes.

[jimmyli]

Hi Wigros,

    Thanks for your reply.

    I haven't received the schematic yet, hope you can send to me ASAP.

    Thanks again.

[weidong_sun]

Hi Jimmy,

weidong

[marcelbässler]

Hi Weidong, 

can you share with me the same file? I have similar questions. 

THX

Marcel