iMX6DL : Is the USB_OTG_ID pin necessary for USB boot (Serial Downloader) ?

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iMX6DL : Is the USB_OTG_ID pin necessary for USB boot (Serial Downloader) ?

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koichisakagami
Contributor II

Dear community,

I consider using the Serial Downloader .
Please see Table 89 (p.133) in IMX6SDLIEC (Rev.3).


The allocated pads during boot for USB interface are USB_OTG_DP , USB_OTG_DN and USB_OTG_VBUS.
There is not USB_OTG_ID pin.

Is the USB_OTG_ID pin necessary for USB boot (Serial Downloader) ?

Best Regards,
Koichi Sakagami

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Yuri
NXP Employee
NXP Employee

  To be fully on safe side it may be recommended to follow USB standards and terminate

all associated signals properly. In the same time, looks like, no additional pins configured / used
(except USB_OTG_DN / DP) by the  boot ROM in Serial (USB) boot mode. I checked it on my SDP.

All related signals / pins (USB_OTG_ID, USB_OTG_OC, USB_OTG_PWR) are configured in default
(after reset) state, when IOMUXC_SW_MUX_CTL_PAD_xxx[MUX_MODE] = 5 (GPIO).


Have a great day,
Yuri

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