i.MX ProcessorsのトピックRe: x

x

xuyuanzhi — Mon, 25 Jun 2018 10:55:41 GMT

When download the Imx8m's Image, the Imx8m EVK board use the J901 USB TYPE-C conncector. I wonder when use the Mfgtool download the Image through this port , the usb is running USB2.0 or USB3.0? When downloading Image, if only the usb1_dp and usb1_dn is needed, the other usb signals is not neceasary? Thank you!

Re: x

Yuri — Tue, 26 Jun 2018 05:51:58 GMT

Hello,

The boot ROM supports the USB OTG port for boot purposes. The other USB ports on the chip are not supported for boot. So, only OTG (USB2) signals (including OTG_ID) are involved in the serial boot mode.

Have a great day,
Yuri

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Re: x

xuyuanzhi — Tue, 26 Jun 2018 06:45:31 GMT

"only OTG (USB2) signals (including OTG_ID) are involved in the serial boot mode". Are you meaning that : only OTG (USB1, not USB2) signals (including USB1_ID, USB1_DP, USB1_DN and USB1_VBUS) are involved in the serial downloading mode? Thank you!

Re: x

Yuri — Thu, 28 Jun 2018 02:24:55 GMT

Correct.

Re: x

xuyuanzhi — Thu, 28 Jun 2018 03:07:10 GMT

Thank you!

Re: x

Yuri — Thu, 28 Jun 2018 04:33:37 GMT

Hello,

Note, after boot ROM loads some primary bootloader, this bootloader can use USB3.

Regards,

Yuri.