USB2.0 ULPI接口介绍

作者：神奇cpp | 2024-08-12 20:42:39

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ulpi

UTMI+ Low Pin Interface (ULPI), a generic low pin interface (LPI) between a Link and a PHY.

1. general

ULPI defines a PHY to Link interface of 8 or 12 signals that allows a lower pin count option for connecting to

an external transceiver that may be based on the UTMI+ specification. The pin count reduction is achieved

by having relatively static UTMI+ signals be accessed through registers and by providing a bi-directional

data bus that carries USB data and provides a means of accessing register data on the ULPI transceiver.

2. signal

USB and Miscellaneous signals may vary with each implementation and are given only as a guide to PHY designers.

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