Interface Specifications
Centronics Interface Specifications
Modes | Compatible, Nibble, ECP |
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Port | Port 1 |
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Data Length | 8 bits |
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Transmission Direction | Unidirectional (receive only), Bidirectional | ||||||
Connector Pin Numbering | 18 | 1 |
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| 19 |
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Parallel interface pin numbers and signals |
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Pin | Name of signal | Signal Direction | Pin | Name of signal | Signal Direction |
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No. |
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1 |
| STROBE | RJ Printer <- | 19 |
| SG |
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2 |
| DATA1 | RJ Printer <- - > | 20 |
| SG |
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3 |
| DATA2 | RJ Printer <- - > | 21 |
| SG |
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4 |
| DATA3 | RJ Printer <- - > | 22 |
| SG |
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5 |
| DATA4 | RJ Printer <- - > | 23 |
| SG |
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6 |
| DATA5 | RJ Printer <- - > | 24 |
| SG |
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7 |
| DATA6 | RJ Printer <- - > | 25 |
| SG |
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8 |
| DATA7 | RJ Printer <- - > | 26 |
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9 |
| DATA8 | RJ Printer <- - > | 27 |
| SG |
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10 |
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| RJ Printer | 28 |
| SG |
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| ACK |
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11 |
| BUSY | RJ Printer | 29 |
| SG |
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12 |
| P ERROR | RJ Printer | 30 |
| SG |
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13 |
| SELECTED | RJ Printer | 31 |
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| RJ Printer <- |
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| INIT |
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14 |
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| AUTOFD |
| RJ Printer <- | 32 |
| FAULT | RJ Plotter |
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15 |
| not used |
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| not used |
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16 |
| SG |
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| not used |
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17 |
| FG |
| 35 |
| not used |
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18 |
| + 5V |
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| RJ Printer <- |
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| SELECTIN |
| Appendix | ||||||||||
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103 |