IEEE 1284


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IEEE 1284

An IEEE standard for an enhanced parallel interface (parallel port) for personal computers, superseding the Centronics interface. Introduced in 1994, IEEE 1284 can send addresses, allowing individual components in a multifunction device (printer, scanner, fax, etc.) to be addressed independently. Unlike the Centronics interface, the specifications of the cable are also defined in IEEE 1284, providing a cable length up to 32 feet. A legacy interface today, IEEE 1284 has been superseded by USB and network connections. See Centronics interface, DOT4 and USB.

Five Modes of Operation
The mode chosen by the software driver is based on the connected device. 1-Compatibility mode supports the Centronics interface at 150 KB/sec. 2-Nibble mode supports Bi-tronics; HP's parallel port variation. 3-Byte mode supports IBM PS/2 personal computers. 4-Enhanced Parallel Port (EPP) provides bidirectional speeds up to 1.5 MB/sec. 5-Enhanced Capability Port (ECP) is similar to EPP but can transfer 2.5 MB/sec using direct memory access (see DMA).


IEEE 1284 Printer Cable
Using the same Micro-Ribbon connectors as the Centronics interface, IEEE 1284 specifies higher-quality cables up to 32 feet long.
References in periodicals archive ?
Weighing less than seven pounds, the Addonics Portable CD with Sound (PCDS) connects to the PC's parallel port, including Enhanced Parallel Ports (EPP) and IEEE 1284 ports.
4 16 Mb Ram 5 Upto 25000 Pages Per Month 6 50 Sheets Multi Purpose Trey-1, 250 Sheets Tay-2 7 Ieee 1284 -Compliant Parallel Port 8 Warranty Clause Mimimum Of One Year Has To Be Specificed In The Offer.
Otras caracteristicas: Interfaz IEEE 1284 (puerto bidireccional paralelo)/U SB(USB2.0 estandar), dos charolas de 500 hojas cada una, escalable a scanner e impresora para red y fax
Designed for printer interface applications, Texas Instruments has announced what is said to be the industry's first IEEE 1284 interface that meets the IEC 61000-4-2 standard for ESD protection.