Parallel Interface
Connector Signals
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| Name | Function | |||||
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| Goes low for ≥ 0.5∝ s when active. |
1 |
| STROBE | ||||||||||
2 |
| DATA0 | These signals represent information for the 1st | |||||||||
3 |
| DATA1 | ||||||||||
| through 8th bit of parallel data, respectively. Each | |||||||||||
4 |
| DATA2 | ||||||||||
| signal is HIGH when data is logical 1, and LOW | |||||||||||
5 |
| DATA3 | ||||||||||
| when logical 0. | |||||||||||
6 |
| DATA4 | ||||||||||
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7 |
| DATA5 |
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8 |
| DATA6 |
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9 |
| DATA7 |
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| 10∝ s low to acknowledge receipt of data. |
10 |
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| ACK | ||||||
11 |
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| BUSY | Printer sets line low when ready to receive data. | ||||||
12 |
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| PAPER | High when paper runs out. | ||||||||
13 |
| SELECT | High when printer is | |||||||||
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14 |
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| AFXT | This signal is used when the mode is nibble mode. | ||||||
15 |
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| Not used. |
16 | SIGNAL GND | Signal ground | ||||||||||
17 |
| CHASSIS | Chassis ground (isolated from signal ground) | |||||||||
18 |
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| +5V | +5V DC output from printer | ||||
19~30 |
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| GND | Twisted pair ground return | |||||
31 |
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| Printer is reset when this signal goes low. | |||||
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| RESET |
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32 |
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| Low when printing cannot continue due to error. | ||||||||
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| ERROR |
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33 |
| EXT GND | External ground | |||||||||
34~35 |
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| Not used |
36 |
| SELECT IN | This signal is used when the mode is nibble mode. | |||||||||
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