Fujitsu C145-C037-01EN manual Parallel Interface Ieee 1284-C Connector

5.3Parallel Interface (IEEE 1284-C Connector)

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

5.3.1Hardware 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 5.5 shows the parallel interface input circuit.

	+5 V
	1 kΩ
Data Strobe	22 Ω
Input Prime
(Auto Feed XT)	100 pF
(Select In)
	+5 V

1.2 kΩ

22 Ω

Data 1-8

Figure 5.5 Parallel interface input circuit

Output circuit: SN74LS244 or equivalent

Figure 5.6 shows the parallel interface output circuit.

+5 V

1.2 kΩ

22 Ω

Figure 5.6 Parallel interface output circuit

5-7