Fujitsu C145-C037-01EN Overview, Parallel Interface Ieee 1284-B Connector, Hardware requirements

CHAPTER 5 INTERFACE INFORMATION

5.1Overview

The PrintPartner 20W printer communicates with the host through two parallel interfaces and a serial interface or an optional interface. The printer automatically selects the interface proper to the occasion. This chapter describes the parallel and serial interfaces. For locations of the parallel and serial interface connectors and the optional interface’s slot, see Figure 1.3.

5.2Parallel Interface (IEEE 1284-B Connector)

The parallel interface is a bidirectional Centronics interface (nibble mode of the IEEE 1284 standard is supported).

5.2.1Hardware requirements

Signal levels: TTL-compatible

0.0to +0.4 V for low-level +2.4 to +5.0 V for high-level

Input circuit: SN74LS14 or equivalent

Figure 5.1 shows the parallel interface input circuit.

+5 V

Data Strobe 1 kΩ

Input Prime

100 Ω

1000 pF

+5 V

Data 1-8

(Auto Feed XT) (Select In)

1kΩ

Figure 5.1 Parallel interface input circuit

5-1