Pin assignments
Signal | Return |
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Pin | Pin | Signal | Direction |
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1 | 19 |
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| IN |
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| pulse to read data. | |
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| STROBE |
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| STROBE | ||||||
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2 | 20 |
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| DATA 0 | IN |
| These signals represent | |||||
3 | 21 |
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| DATA 1 | IN |
| information in bits 0 to 7 of | |||||
4 | 22 |
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| DATA 2 | IN |
| parallel data respectively. | |||||
5 | 23 |
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| DATA 3 | IN |
| Each signal is at HIGH level | |||||
6 | 24 |
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| DATA 4 | IN |
| when data is logical 1 and | |||||
7 | 25 |
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| DATA 5 | IN |
| LOW when it is logical 0. | |||||
8 | 26 |
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| DATA 6 | IN |
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9 | 27 |
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| DATA 7 | IN |
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10 | 28 |
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| OUT |
| About a | ||||
| ACKNLG |
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| indicates data has been | |
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| received and the printer is | |
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| ready to accept more data. | |
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11 | 29 |
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| BUSY | OUT |
| A HIGH signal indicates the | ||||
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| printer cannot receive data. | |
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| The signal goes HIGH in the | |
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| following cases: | |
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| 1) During data entry | |
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| (for each character) | |
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| 2) During initialization | |
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| 3) During self test, | |
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| demonstration, and | |
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| 4) During a | |
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12 | 28 |
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| PE | OUT |
| A HIGH signal indicates the | ||||
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| printer is in a | |
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| or in an error state | |
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13 | 28 |
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| SLCT | OUT |
| Always at high when printer is | ||||
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| on | |
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14 | 30 |
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| IN |
| Not used | ||||
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| AUTO |
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| FEED |
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| XT |
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15 | — |
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| NC | — |
| Not connected | ||||
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16 | — |
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| GND | — |
| Logic ground level | ||||
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17 | — |
| CHASSIS | — |
| Printer’s chassis ground, | ||||||
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| GND |
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| which is connected to the | ||||
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| logic ground | |
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