TUSB1210 DIR held high with data of x"1c"

Mike Perkins

Other Parts Discussed in Thread: TUSB1310, TUSB1210

I am using two of these PHYs back to back through a FPGA. One playing Peripheral and the other Host. On the Host port I have a memory stick and on the Peripheral port a Windoze PC and both are operating at High Speed.

I get a significant number of resets [1] and then communication stops with either device randomly stuck with DIR high and Data of x"1c" (NXT and STP are both low)

Is there any reason why either should ever lock up in this state?

[1] From SE0 being applied continuously for more than 3ms and not to be confused with a hardware reset.

over 9 years ago

0 Diego Cortes over 9 years ago

TI__Mastermind 36085 points

Hello Mike,

We are looking at this and we'll reply soon.

regards,

Diego.

0 Mike Perkins over 9 years ago in reply to Diego Cortes

Intellectual 565 points

My apologies. Some data is being corrupted and it is possible this data is being interpreted as a TXCMD.

Will look into this further and come back here.

Regards

Mike

0 Mike Perkins over 9 years ago in reply to Mike Perkins

Intellectual 565 points

I had believed all packets would have a PID for the first byte.

It seems that I occasionally receive a non-PID byte for the first byte of a stream after an IN token.

Perhaps I'm misunderstanding USB protocols, but I thought all data was preceded by a PID. Is there any reason when this would not be the case?

Or is this an example of a corrupted packet?

0 Mike Perkins over 9 years ago in reply to Mike Perkins

Intellectual 565 points

Going back to the subject title.

This is an example of lockup I am seeing.

Apologies that STP has been omitted but can be assumed being assert before NXT going low.

The issue is that once DIR is high and stays , there is no possibility of further communication save for a hard reset.

0 Mike Perkins over 9 years ago in reply to Mike Perkins

Intellectual 565 points

Is there any connection with the TUSB1310 having a False Unlock issue that require a hardware reset to recover?

http://e2e.ti.com/support/interface/digital_interface/f/130/t/349404.aspx

0 Mike Perkins over 9 years ago in reply to Mike Perkins

Intellectual 565 points

Hi Diego,

Any news or idea if this might be resolved?

A couple of days have passed and I'm obliged to starting to look at other PHYs.

Regards

Mike

0 Diego Cortes over 9 years ago in reply to Mike Perkins

TI__Mastermind 36085 points

I am sorry for the delay Mike, but since I am not an expert on ULPI, I had to address your issue with an expert on the ULPI and I am waiting for the feedback, so I hope to have your feedback by the next week.

Regards,

Diego.

0 Mike Perkins over 9 years ago in reply to Diego Cortes

Intellectual 565 points

Hi Deigo,

Sorry but champing at the bit, as they say here!

I look forward to hearing your reply.

Regards

Mike

0 Mike Perkins over 9 years ago in reply to Diego Cortes

Intellectual 565 points

Hi Diego,

Any news?

Regards

Mike

0 Mike Perkins over 9 years ago in reply to Mike Perkins

Intellectual 565 points

Quite clearly this lockup issue is a fundamental issue in the TUSB1210 with no prospect of a solution.

The lack of any solution says volumes that alternative PHYs should be considered.

0 Mike Perkins over 9 years ago in reply to Mike Perkins

Intellectual 565 points

60 days and counting with no prospect of any solution.

Is this a record?

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TUSB1210 DIR held high with data of x"1c"