Layerscape中的主题 Re: MiniPCIE does not work via USB bus

MiniPCIE does not work via USB bus

upartners — Tue, 21 Mar 2017 06:47:44 GMT

The LS1043ARDB supports USB2.0 connection on the MiniPCIE connector. I have a 4G module whose interface is MiniPCIe, the actual comminacation bus is the USB2.0. I connect this module to the MiniPCIo connector on LS1043ARDB, the module does not work.

I found in the schematic that the USB3_ID of the USB3 which is used in MiniPCIE is floating.I think that USB3 can only be used as device/slave,can not be used as host,right?

If I was right, what should I do?

If I was wrong, Could you please tell me how to debug?

Looking forward to your reply.

Have a great day.

Re: MiniPCIE does not work via USB bus

Pavel — Tue, 21 Mar 2017 10:56:30 GMT

The USB_ID is USB OTH signal. This pin should be tied to GND on the host connector (ID pin resistance to ground < 10 Ohm).

This pin should be floating on USB device connector (ID pin resistance to ground > 10 KOhm). See USB OTG Specification.

Have a great day,
Pavel Chubakov

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Re: MiniPCIE does not work via USB bus

upartners — Tue, 21 Mar 2017 11:06:18 GMT

Yes,I understand.

I would like to confirm that the USB of MiniPCIe on RDB can not be used as a Host?

If we want to use this USB as Host, we must tie USB3_ID to GND?

Have a great day.

Re: MiniPCIE does not work via USB bus

Pavel — Thu, 23 Mar 2017 06:38:27 GMT

If you want to use this USB as Host, you must tie USB3_ID to GND.

It is correct for any USB OTG connection. Therefore it is correct for USB from MiniPCIe board.

Have a great day,
Pavel Chubakov

Re: MiniPCIE does not work via USB bus

upartners — Thu, 18 May 2017 06:28:57 GMT

We design our product refer to the LS1043ARDB, and want to use USB3 as host mode. We MUST tie USB3_ID to GND, is it enough?

The USB3_DRVVBUS Pin is used for TDMA_RQ in the LS1043ARDB, we use USB3 as host mode, deos USB3_DRVVBUS need?

Looking forward to your reply.

Have a great day.

Re: MiniPCIE does not work via USB bus

Pavel — Mon, 22 May 2017 04:36:51 GMT

The USB2_DRVVBUS and USB3_DRVVBUS are output of the LS1043a USB controllers. These pins are used for enable USB_VBUS using external power switch like to MX1558.

The USBn_PWRFAULT are input indicates that a Vbus fault has occurred. Power switch set low on this pin if a Vbus fault has occurred.

If the LS1043a is USB host, these signals are needed for providing USB VBUS.

Have a great day,
Pavel Chubakov

Re: MiniPCIE does not work via USB bus

michaelscott40 — Fri, 22 Sep 2017 15:23:05 GMT

Hello,

I am evaluating LS1043ARDB hardware labelled SCH-28529 REV C / TDA5625 / CPLD V 1.4. I would like to use a MiniPCIe Wireless Card w/ USB interface for Bluetooth. After looking at the schematic and reading this discussion it is obvious why this does not work at the moment.

Do you have instructions for how to tie USB3_ID to GND? I would like to modify my hardware to continue evaluation.

Thank you.