Interface Specifications
The LQ is equipped with both a parallel and a serial interface.
Do not plug more than one interface cable into the printer
8 at one time. This may damage your printer.
Parallel interface
Connector pin assignments and a description of their respective interface signals are shown in the following table.
Signal | Return | Signal | Direction |
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1 | 19 |
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| IN | STROBE pulse to read data. |
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STROBE |
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| Pulse width must be more than |
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| 0.5 microseconds at the receiving | ||||
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| terminal. |
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| 20 | DATA | 1 |
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| IN | These signals represent information | ||||
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| DATA | 2 |
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| IN | of the 1st of 8th bits of parallel |
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4 | 22: | DATA | 3 |
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| IN | data, respectively. | Each signal | is | a t | |
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| DATA | 4 |
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| IN | HIGH level | when | data is logical | 1 | |
: | 2 | DATA | 5 |
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| IN | and LOW | when | it is logical 0. |
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| 25 | DATA | 6 |
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ii |
| DATA | 7 |
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9 | 2 | DATA | 8 |
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10 | 28 |
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| OUT | About an | 1 1 microsecond | pulse. | ||||
ACKNLG | |||||||||||
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| LOW indicates that data has been | ||||
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| received and that the printer is | ||||
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| ready to accept more data. |
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11 | 29 | BUSY |
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| OUT | A HIGH signal indicates that | the | |||
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| printer cannot receive data. The |
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| signal goes HIGH in the following | ||||
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| cases: |
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| 1) During data entry (ea. char. |
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4) During