The UTMI+ low-pin interface (ULPI) industry specification for Hi-Speed USB and USB On-the-Go transceiver chips has been made public for the first time today.
The standard aims to save design development time, simplify verification and production testing, and help ensure interoperability between embedded USB core logic and Hi-Speed USB transceivers.
According to the ULPI Working Group, the specification enables designers of application-specific integrated circuits, systems-on-chip and flash-programmable gate arrays to incorporate a standard interface to connect off-the-shelf Hi-Speed USB transceivers into their designs.
"More than 85 companies worldwide have adopted the ULPI specification, and we expect publication of the specification to greatly increase the adoption rate," said Batuhan Okur, chairman of the ULPI Working Group.
"With ULPI, the standalone PHY pin count has been dramatically reduced from as many as 100 down to approximately 30, greatly simplifying the design process and manufacturing requirements for Hi-Speed USB connectivity, which is a key feature on virtually every digital device, including computers, MP3 players and digital cameras."
Until today, the ULPI specification has only been made available to third-party companies that signed the ULPI Adopters Agreement.
The companies that subsequently use the ULPI interface will have the option to sign the Adopters Agreement to obtain the royalty-free ULPI licence.
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