PHY

PHY is a generic electronics term refering to a special electronic integrated circuit or functional block of a circuit that provides physical access to a digital connection cable.

Example uses

• A PHY chip is commonly found on Ethernet devices. Its purpose is the physical access of the link. Usually used together with an MII-Chip.
• A PHY part is integrated in most Universal Serial Bus (USB) controllers in hosts or embedded systems and provide the electrical part of the interface.