HARDWARE DESCRIPTION
For signal description and pin assignment, refer to the table below:
Table 5. Signal description and pin assignment | ||||||||||
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Signal | Iizn |
| IIke&on |
| Description | |||||
Signal |
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Pin |
| Pin |
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| 19 |
| YimiE |
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| IN |
| pulse to read data. Pulse | |
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| STROBE | ||||||||
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| width must be more than 0.5 micro- | |
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| seconds at the receiving terminal. | |
| 20 |
| DATA 1 |
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| I N | These signals represent information | ||
| 21 |
| DATA 2 |
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| I N | of the 1st to 8th bits of parallel data, | ||
| 22 |
| DATA 3 |
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| I N | respectively. Each signal is at | ||
| 23 |
| DATA 4 |
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| I N | HIGH level when data is logical 1 | ||
| 24 |
| DATA 5 |
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| I N | and LOW when it is logical 0. | ||
| 25 |
| DATA 6 |
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| IN |
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| 26 |
| DATA 7 |
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| IN |
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| 27 |
| DATA 8 |
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| I N |
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| OUT | About a | |
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| vXNLG |
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| LOW indicates that data has been | |
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| received and that the interface | |
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| board is ready to accept more data. | |
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| This signal is output as a pair | |
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| together with BUSY. | |
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| BUSY |
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| OUT | A HIGH signal indicates that the | |
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| interface board 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 (ea. car. time) | |
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| 2) When off line | |
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| 3) During | |
12 | 30 |
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| OUT | A HIGH signal indicates that the | ||
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| printer is out of paper. | |
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13 |
| SLCT |
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| OUT | Pulled up to +5 V through 3.3k ohm | |||
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| L |
| resistance. | |||
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