Browse Definitions :
Definition

EPP/ECP (Enhanced Parallel Port/Enhanced Capability Port)

EPP/ECP (Enhanced Parallel Port/Enhanced Capability Port) is a standard signaling method for bi-directional parallel communication between a computer and peripheral devices that offers the potential for much higher rates of data transfer than the original parallel signaling methods. EPP is for non-printer peripherals. ECP is for printers and scanners. EPP/ECP are part of IEEE Standard 1284, which also specifies support for current signaling methods (including Centronics, the de facto standard for printer communication) so that both old and new peripherals can be accommodated.

The new standard specifies five modes of data transfer. Three of them support the older mono-directional modes (a forward direction method from PC to Centronics printer and two reverse direction methods from peripheral to the PC). The fourth and fifth modes, EPP and ECP, are bi-directional signaling methods, meaning that they are designed for back-and-forth communication. Partly because these are being implemented in hardware, EPP and ECP will provide much faster data transfer. The first three methods offer an effective data transfer rate of 50 to 100 kilobytes per second. EPP and ECP offer the possibility of rates "in excess of 1 megabyte per second," according to Warp Nine, a chip manufacturer.

In order to get the maximum advantage of EPP/ECP, both operating system (or an I/O port controller, or both) and peripheral device must support the standard. Initially, you may get the best effect from EPP and a Zip drive. Even printers that support ECP are limited by the mechanical aspects of printing. Nevertheless, even users of the compatibility modes of Standard 1284 are also expected to see some benefit in data transfer to and from peripherals.

Windows operating systems have built-in support for IEEE 1284 in their parallel plug and play feature. Windows also supports ECP in forward direction, assuming you have a printer and a parallel port with ECP. It is likely that other vendors will provide ECP or EPP software for other operating systems.

EPP/ECP is described fully in IEEE Std. 1284-1994 Standard Signaling Method for a Bi-Directional Parallel Peripheral Interface for Personal Computers.

This was last updated in March 2011

Continue Reading About EPP/ECP (Enhanced Parallel Port/Enhanced Capability Port)

SearchNetworking
  • routing table

    A routing table is a set of rules, often viewed in table format, that's used to determine where data packets traveling over an ...

  • CIDR (Classless Inter-Domain Routing or supernetting)

    CIDR (Classless Inter-Domain Routing or supernetting) is a method of assigning IP addresses that improves the efficiency of ...

  • throughput

    Throughput is a measure of how many units of information a system can process in a given amount of time.

SearchSecurity
  • quantum key distribution (QKD)

    Quantum key distribution (QKD) is a secure communication method for exchanging encryption keys only known between shared parties.

  • Common Body of Knowledge (CBK)

    In security, the Common Body of Knowledge (CBK) is a comprehensive framework of all the relevant subjects a security professional...

  • buffer underflow

    A buffer underflow, also known as a buffer underrun or a buffer underwrite, is when the buffer -- the temporary holding space ...

SearchCIO
  • benchmark

    A benchmark is a standard or point of reference people can use to measure something else.

  • spatial computing

    Spatial computing broadly characterizes the processes and tools used to capture, process and interact with 3D data.

  • organizational goals

    Organizational goals are strategic objectives that a company's management establishes to outline expected outcomes and guide ...

SearchHRSoftware
  • talent acquisition

    Talent acquisition is the strategic process employers use to analyze their long-term talent needs in the context of business ...

  • employee retention

    Employee retention is the organizational goal of keeping productive and talented workers and reducing turnover by fostering a ...

  • hybrid work model

    A hybrid work model is a workforce structure that includes employees who work remotely and those who work on site, in a company's...

SearchCustomerExperience
  • database marketing

    Database marketing is a systematic approach to the gathering, consolidation and processing of consumer data.

  • cost per engagement (CPE)

    Cost per engagement (CPE) is an advertising pricing model in which digital marketing teams and advertisers only pay for ads when ...

  • B2C (Business2Consumer or Business-to-Consumer)

    B2C -- short for business-to-consumer -- is a retail model where products move directly from a business to the end user who has ...

Close