Specifications

Rockhopper 38 – Maintenance Manual
28
AP-74038, Rev. 1.1, 25/01/05
3.3. INTERFACE SPECIFICATIONS
This section explains the specifications for the interfaces supported by this product.
3.3.1. Centronics Bidirection Parallel Interface:IEEE1284)
(1) Interface Specifications
Item Specifications
Transmission modes Compatible , Nibble , ECP Mode
Data length 8 bits
Transmission direction Unidirectional (receiving only), Bidirectional
Connector pin number
(2)
Table of parallel interface pin numbers and signals
Pin
number
Connection
signal
Signal direction Pin
number
Connection signal Signal
direction
1 STROBE To printer  19 SG
2 DATA1 To and from printer   20 SG
3 DATA2 To and from printer   21 SG
4 DATA3 To and from printer   22 SG
5 DATA4 To and from printer   23 SG
6 DATA5 To and from printer   24 SG
7 DATA6 To and from printer   25 SG
8 DATA7 To and from printer   26 SG
9 DATA8 To and from printer   27 SG
10 ACK From printer  28 SG
11 BUSY From printer  29 SG
12 P ERROR From printer  30 SG
13 SELECTED From printer  31 INIT To printer 
14 AUTOFD To printer  32 FAULT From printer 
15 Not connected 33 Not connected
16 SG 34 Not connected
17 FG 35 Not connected
18 +5V 36 SELECTIN To printer 
(3)
Recommended Centronics cable specifications
Item Specifications
Interface Dual-direction Parallel Interface:IEEE1284
Structure AWG28×18 (twisted pair wiring)
Shield construction Metallic tape + weaving (double shielded cable)
Characteristic impedance
62 Ω