![](/images/backgrounds/112978/112978-12392x1.png)
Signal | Return |
| Signal |
| Direction | Description |
Pin | Pin |
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18 | - |
| NC |
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| Not used |
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| GND | - | |||
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| level |
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| - |
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31 | 16 |
| INIT |
| IN | When this level becomes LOW, |
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| the printer controller is reset to |
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| its state when the power is first |
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| turned on and the print buffer is |
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| cleared. This level is normally |
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| HIGH; its pulse width must be |
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| more than 50 us at the receiving |
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| terminal. |
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32 | - |
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| OUT | This level becomes LOW when: |
| ERROR |
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| 1) The |
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| 2) The PAUSE button is |
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| pressed |
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| 3) An error occurs |
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33 | - | 1 | GND | - | Same as for pins | |
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34 |
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| NC |
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| Not used |
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35 | - |
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| Pulled up to 5 V through 1 .O kR |
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| resistance |
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36 |
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| NC |
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| Not used |
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Note:
The column heading “Direction” refers to the direction of signal flow as viewed from the printer.
“Return” denotes the
All interface conditions are based on the TTL level. Both the rise and fall times of each signal must be less than 0.2 microseconds.
Data transfer must be carried out by observing the ACKNLG or BUSY signal. Data transfer to this printer can be carried out only after receipt of the ACKNLG signal or when the BUSY signal is LOW.
A p p e n d i x A - 9