topic Re: USB circuit review needed in i.MX Processors

USB circuit review needed

teju — Thu, 20 Dec 2012 11:42:23 GMT

Hi,

I request a review of the USB circuits designed for the IMX.53. We intend using both the on chip USB's as hosts.

Thanks

Teju

Re: USB circuit review needed

Yuri — Wed, 26 Dec 2012 05:33:51 GMT

I do not see "criminals" on the scheme, assuming the i.MX53 OTG will be always used in host mode (ID is grounded).

Re: USB circuit review needed

teju — Wed, 26 Dec 2012 10:43:33 GMT

Thanks for your time.

Re: USB circuit review needed

JorgeRama_rezRi — Fri, 11 Jan 2013 18:12:36 GMT

Hi Teju,

Just one recommendation. When we use our channels as hosts, we use to place current limiters at VBUS just to make sure the USB max current specification is not exceeded. You can find examples of this in our reference designs.

Best regards.

Jorge.

Re: USB circuit review needed

LeonCraven — Thu, 23 May 2013 00:45:57 GMT

If you are running both as host ports, do you need to connect USB_OTG_VBUS and USB_H1_VBUS to +5V via an RC filter, or can it be left floating?

I can't find the purpose of the VBUS pin in the literature. I'm assuming it is only used by the OTG port when it can operate as either an A or B port; to detect when external VBUS is applied. Is that correct?