i.MX50: Pin terminations for USB Host design

[norishinozaki]

Hello Champs,

My cusotmer is designing USB Host(No OTG used) and terminated USB related pins  with according to the "Chapter 1 Design Chack List" of the Software Development Guide as follows.

USB_H1_VBUS: 5V supply for USB

USB_H1_RREFEXT: 6.04K Pull-down

USB_H1_GPANAIO: OPEN

USB_OTG_DP, DN, ID, VBUS, RREFEXT, GPANAIO: OPEN

Is it Ok to follow SDG for designing USB Host?

Because I heard i.MX50 EVK and the SDG were designed before the datasheet is fixed.

Best Regards,

Nori Shinozaki

[igorpadykov]

Hi Nori

it is Ok to follow SDG for designing USB Host,

also example of USB Host can be found in

i.MX50 EVK Board Schematics : i.MX50 Quick EVK board Design Files

Best regards

igor

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[norishinozaki]

Hello Igor,

They refer the schematics.

However the EVK USB is designed to be used in OTG mode.

These 6 pins are not figured out how to terminate in Host mode.

USB_OTG_DP

DN

ID

VBUS

RREFEXT

GPANAIO

Are they OK with OPEN in Host Mode as in the OTG?

Best regards,

Nori Shinozaki

[igorpadykov]

Hi Nori

p.13 EVK schematic SCH-26721 has Host port connections.

OTG mode has the same connections, except that it

should have ID=0 .

Best regards

igor

[norishinozaki]

Igor,

Thanks for confirmation!

Best regards,

Nori Shinozaki