ECP
Acronym for extended capabilities port. An asynchronous, 8-bit-wide parallel channel defined by IEEE 1284-1994 that provides PC-to-peripheral and peripheral-to-PC data transfers.
EISA
Acronym for Extended Industry Standard Architecture bus.
Energy Star
Abridgment of EPA Energy Star computers. A program initiated by the U.S. Environmental Protection Agency and computer manufacturers documenting standards of power management designed to reduce the electricity load of computer systems in the commercial sector. Computers that meet the requirements of the Energy Star program qualify for the Energy Star logo.
enumeration
The process by which logical devices and buses, and their available resources, are identified in a Plug and Play system.
enumerator
A Plug and Play system component that takes responsibility for detecting logical child devices and reports the existence of those devices to the configuration manager during startup.
expansion bus
A group of address, data, and control lines that provide a buffered interface to devices located either on the system board or on cards that are plugged into expansion connectors. Expansion buses on the system board can include the USB, PC Card, PCI, and other buses.
expansion card
A card that connects to an expansion bus and that contains one or more devices.
expansion ROM
See option ROM.