Epson 8900 Series manual Parallel Communication Interface

Parallel Communication Interface

The parallel communication interface uses a 36-pin connector (shown in the following figure) that transfers both data and control signals between the printer and the host computer. The parallel interface connector is located at the rear of the printer and provides bail latches to secure the interface cable connector. The table on the following page lists the parallel interface signals, their names, their pin assignments, and their sources (host or printer). The paragraphs that follow the table describe these signals.

The parallel interface can only transfer data from the host to the computer and is limited to a distance of approximately 6 feet (1.8 meters). However, because the parallel interface provides separate lines for each character bit, it can transfer an entire character in a single data-transfer operation. Thus, the parallel interface is much faster than a serial interface and is ideally suited for connecting local printers in a computer system.

Communication Interfaces 10-6