TUSB1210 issue with Zynq-7000

Hello,

This post is being handled by email.

Regards,
Diego.

William Liu said:

I have a customer who is focusing on currency counter/sorter. Here we met an issue when using USB PHY. According to the FPGA application note, TUSB1210 has the incompatible issue withZyng-7000(attached file, Page 6 ), so customer choose USB3320 instead of TI. Could you please help suggest which part is available for replacement of TUSB1210 ?

The USB3320 is similar to the TUSB1210 with near identical pinout though requires a few additional components.

It seems well liked as a ULPI PHY.. I've migrated a design to this device after finding some serious issues with the TUSB1210 that are still unresolved. I have yet to try out this new design.

Diego Cortes said:

Hello,

This post is being handled by email.

Regards,
Diego.

Whenever there is an issue with the TUSB1210, the conversation seems to always end up offline.

The whole point of having a forum is to help others, and continuing a conversation behind a closed door is of little help to anyone thinking of using this device, where problem after problem go unanswered.

Is there any chance this post could remain handled in this forum, to give potential user some insight into this device? Otherwise I have to assume that your private emails will just endorse the use of the USB3320.

Hello Mike,

The thing is that we started to handle this issue offline. The original thread contains sensitive information (from customer's and TI side), therefore it must be followed in private.

Best regards,
Diego.

Diego Cortes said:

Hello Mike,

The thing is that we started to handle this issue offline. The original thread contains sensitive information (from customer's and TI side), therefore it must be followed in private.

The only identifying aspect of the original post was this project is for a customer who is working on a currency sorter/counter. If Mr Liu believed this was sensitive information, then MR Liu could have omitted this without losing any substance to his post.

The issue regarding the specification is very real and is noted in the Zync-7000 errata datasheet.

Suggesting an alternative to the TUSB1210 or why the setup times aren't fully specified might be embarrassing for TI, but nevertheless it wouldn't involve Mr Liu's sensitive information.  I can't see any sensitive formation from TI apart from an admission that this device doesn't work in the intended spirit of a ULPI interface.

Indeed, TI retaining sensitive information is very damaging in terms of customer confidence in using this part and entirely counter productive.

I too am involved in a project where we've a TUSB1210 attached to the Zynq device. Sadly no one saw the notes pointing out the problem with this part. 

We have the situation where the Zynq doesn't seem to want to talk to the TUSB1210 at all and I'm wondering if this issue is the reason for not using this part, or is there some other underlying issue in the hardware. Does anyone know how the timing issue manifests or is the TUSB1210 just a non-starter for use with a Zynq? All of the links hinting at details of the issue seem to be dead links now.

Best regards

Paul

The lack of reply by any TI employee says quite a lot in terms of support TI can provide on this part.

To be fair to TI this is a very mature part and the team who designed this may well not have part of TI or if they were have long since disbanded. Sadly there seems no epxertise left.

I too have had issues with this part with a repeatable lockup only solved by a chip reset. In short I have moved to the MicroChip USB3320.  Naturally no one from TI could help me.

The TUSB1210 is very affordable but sometimes cheapest is not best.

I wish you the best.