Q. I am using the ULPI specification in my design do I have to sign the adopters agreement?

A. No. ULPI working group doesn't require you to sign the adopters agreement.

Q. My company has signed the adopters agreement, I would like to join the reflector and ask questions. What should I do?

A. We no longer maintain a reflector. Your IP or Silicon partner will be able to answer all your questions. 

Q. I am working for a multi-national company and I would like to know if my company adopted the specification or not, what should I do?

A. Please see the list of companies in the about us section. Although, we try to update the web site regularly, your company name might have not made it yet. Therefore, you can send an e-mail to info@ulpi.org from your company e-mail address, we will get back to you very soon. 

Q. I am hearing a lot about ULPI, is it really taking off?

A. Yes, ULPI is ubiquitous for USB designs. Multiple IP and PHY vendors offer competitive solutions. Up to date, more than 100 companies adopted ULPI specification from all over the world. Please see about us section for a list of companies who are involved in ULPI.

Q. What are the differences between 1.0 and 1.1 version of the ULPI specification? 

A. There is a change bar document included in the zip file above, please refer to the ULPI_v1_1_changebar.pdf for details.