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.
Parallel port, you just need a special cable to connect to it. Generation lasers included a DB-25 pin port for serial. After all the. Thank you to ken, ato_zee, Dewaine Chan, Dan G, Impmon, Clark W.Griswold Jr. PENGKABELAN PORT SERIAL Pada prinsipnya, serial ialah pengiriman data dilakukan per bit, sehingga lebih lambat dibandingkan parallel seperti pada port printer yang mampu mengirim 8 bit sekaligus dalam sekali detak.
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
Windows operating systems have built-in support for IEEE 1284 in their parallel plug and play feature. Windows also supports ECP in
EPP/ECP is described fully in IEEE Std. 1284-1994 Standard Signaling Method for a Bi-Directional Parallel Peripheral Interface for Personal Computers.
Every computer is built with tons of different ports that perform various functions. Two of the most important types for data trans are serial ports and parallel ports.
This article will explain to you the differences and similarities between the two types of port. Serial Ports Serial ports are generally built into the mother board, which is why the connectors behind the casing that are connected to the mother board by a wire cable can be used to connect an exterior element.
Serial connectors generally have 9 or 25 pins and resemble the following (DB9 and DB25 connectors respectively): A personal computer generally has between one and four serial ports. Parallel Ports Parallel data transmission involves sending data simultaneously on several channels (wires). The parallel ports on personal computers can be used to send 8 bits (one octet) simultaneously via 8 wires: The first two-way parallel ports allowed for speeds of 2.4Mb/s. Enhanced parallel ports have been developed however to achieve higher speeds — the EPP ( Enhanced Parallel Port) achieves speeds of 8 to 16 Mbps, and the ECP ( Enhanced Capabilities Port), developed by Hewlett Packard and Microsoft has the same characteristics as the EPP, with a Plug and Play feature, allowing the computer to recognise the connected peripherals.
Parallel ports, like serial ports, are built into the mother board. DB25 connectors allow for connection to an exterior element (e.g. A printer): Image: © Signs and Symbols - Shutterstock.com.