Parallel Interface (Ieee 1284-C Connector); Hardware Requirements; Figure 5.5 Parallel Interface Input Circuit; Figure 5.6 Parallel Interface Output Circuit - Fujitsu C145-C037-01EN Product Description

5.3

Parallel Interface (IEEE 1284-C Connector)

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

5.3.1 Hardware requirements

Signal levels: TTL-compatible
0.0 to +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.
Output circuit: SN74LS244 or equivalent
Figure 5.6 shows the parallel interface output circuit.
+5 V
Data Strobe
Input Prime
(Auto Feed XT)
(Select In)
+5 V
Data 1-8

Figure 5.5 Parallel interface input circuit

Figure 5.6 Parallel interface output circuit

1 k
22
100 pF
1.2 k
22
+5 V
1.2 k
22
5-7