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 however it recommends it. By signing the adopters agreement, you will get free royalty free ULPI license. If your organization chooses not to sign the adopters agreement, you may expose yourself to IP infringement litigation from ULPI Working Group Members

Q. I have signed the agreement and sent it to the address, when will I get the signed agreement back?

A. The signed agreements are sent in batches, therefore it may take up to three months to get your agreement back. Sometimes we get agreements that are handwritten and it is not possible to understand the return name and address, therefore, please always include a business card for return name and address. 

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 at ulpi dot 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 getting 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.