i.MX6 USB Transceiver

[atillametetured]

Greetings,

Quick question about the USB Host Interface of the i.MX6.

Despite the fact that the datasheet implicitly says that there exists a USB HS Transceiever (USBPHY) as can

be seen in the image below;

Sabre for Infotainment includes a USB Transceiver IC as can be seen in the schematic snippet below;

Why is there a need for the USB3317 IC? Is it perhaps because there are 2 USB Host connections in the

Sabre design? Am I misinterpreting the datasheet when it says "USB support is composed of USBPHY (HS USB

Transceiver) ?

Thanks in advance for any replies.

Atilla

[atillametetured]

On a second thought, I figured out I am probably misinterpreting it when it says it supports USBPHY. Please

confirm that I MUST use a transceiver to use the USB Host functionality. If so, is there a special reason to use

USB3317?

[igorpadykov]

Hi Atilla

USB3317 is not used with i.MX6, it is used with i.MX53 as

SCH-26662 is common board for both processors.

USB HSIC transceivers may be used with i.MX6 HSIC interface

like : USB_H3_STROBE,USB_H3_DATA signals.

Best regards

igor

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[atillametetured]

Hello Igor,

Thanks for your reply

Is there a suggested USB transceiver IC to use with the i.MX6 then?

Also is there a special reason why iMX 6 Boards do not utilize

USB functionality except OTG (correct me if they do so I can check that out

instead)?

Best Regards,

Atilla

[atillametetured]

And that is not for HSIC but UTMI/ULPI. I want to use the USB Host (not OTG)

in a standart USB Host - Peripheral Setup. Please advice me on a transceiver or setup

to use with i.MX6 regarding this. I know only Port 1 can be used for this purpose and

that is okay.

[igorpadykov]

Hi Atila

ulpi transceivers are not supported by i.MX6DQ/SDL,

for HSIC one can use USB4640.

USB Host can be found on Sabre schematic spf-27392 p.3

SABRE for Smart Devices Reference Design|NXP

~igor

[atillametetured]

Dear Igor,

Okay you are really making me confused, here is a screenshot from the iMXDQ Referrene Manual;

Also there is nothing related to USB on page 3 of SPF27392

On page 11, USB OTG conenction is shown only.

So please give me a detailed answer on this so we dont waste more time on this subject:

On a custom hardware using iMX6Q, what do I need to do in order to connect a USB Type A

so I can make my device USB Host. Please dont mention HSIC again, I cant use the HSIC ports

for that purpose.

Thanks

Atilla

[igorpadykov]

Hi Atila

for USB Host one can look at p.11 attached schematic.

USB module supports ulpi transceivers, but in i.MX6 ulpi signals are

not routed externally.

Best regards

igor