topic Re: Attach event detect in USB Host in i.MX Processors

Attach event detect in USB Host

ko-hey — Thu, 21 May 2015 05:39:17 GMT

Hi all

I want to confirm a USB behavior, when I use USB as Host

When D+/D- goes High before initialization, can I detect Attach event ?

I read those following descriptions but there are no explanations.

"65.4.3.1 Host Controller Initialization"

http://cache.freescale.com/files/32bit/doc/ref_manual/IMX6DQRM.pdf

Ko-hey

Re: Attach event detect in USB Host

igorpadykov — Thu, 21 May 2015 07:03:15 GMT

Hi ko-hey

in general attach event can be detected before

full usb controller initialization, please look at

sect.66.2.4.5 USB Plugged-In Detector IMX6DQRM

Description for attach event can be found

in sect.7.1.7.3 Connect and Disconnect Signaling usb 2.0

specification.

Best regards

igor

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Re: Attach event detect in USB Host

ko-hey — Thu, 21 May 2015 07:36:39 GMT

Hi Igor

Thank you for your reply.

I understood like this↓. Is it correct ?

Since the detection of attach event before the initialization has been defined by the standard so i.MX6 also can be detected.

Ko-hey

Re: Attach event detect in USB Host

igorpadykov — Thu, 21 May 2015 08:26:54 GMT

Hi ko-hey

what is: "I understood like this↓. Is it correct ?" ???

~igor

Re: Attach event detect in USB Host

ko-hey — Thu, 21 May 2015 08:32:09 GMT

Igor

I apologize for any confusion.

I mean following sentence.

「Since the detection of attach event before the initialization has been defined by the standard so i.MX6 also can be detected.」

Ko-hey

Re: Attach event detect in USB Host

igorpadykov — Thu, 21 May 2015 08:51:10 GMT

Hi ko-hey

yes correct

Best regards

igor

Re: Attach event detect in USB Host

ko-hey — Thu, 21 May 2015 08:53:58 GMT

Igor

Thank you !

Ko-hey