Signal pin assignments
In this table, the direction of the signals is given relative to the scanner.
Pin No. | Return pin |
| Signal | I/O | Comment | |
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1 | 19 |
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| IN | STROBE pulse to read in | |
| STROBE |
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| or send out data. Pulse |
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| width must be more than |
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| 0.5 microseconds at the |
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| receiving terminal. |
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2 | 20 |
| DATA0 | IN/OUT | These signals represent | |
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| information of bits 1 to 8, |
3 | 21 |
| DATA1 | IN/OUT | ||
| respectively. Each signal is | |||||
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| at a High level when data is |
4 | 22 |
| DATA2 | IN/OUT | ||
| logical 1 and Low when it is | |||||
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| logical 0. |
5 | 23 |
| DATA3 | IN/OUT | ||
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6 | 24 |
| DATA4 | IN/OUT |
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7 | 25 |
| DATA5 | IN/OUT |
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8 | 26 |
| DATA6 | IN/OUT |
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9 | 27 |
| DATA7 | IN/OUT |
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10 | 28 |
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| OUT | About a | |
| ACKNLG |
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| pulse. Low indicates that |
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| data has been received and |
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| that the scanner is ready to |
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| accept more data. |
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11 | 29 |
| BUSY | OUT | When this signal is High, | |
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| the scanner cannot receive |
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| data. The signal becomes |
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| High: |
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| 1) during data entry, |
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| 2) during scanning, |
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| 3) when the scanner is not |
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| ready, |
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| 4) when a scanner error |
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| occurs. |
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12−15 | - |
| NC | - | Not used | |
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16 | - |
| GND | - | Logical ground level | |
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17 | - |
| - | Scanner chassis ground | ||
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Interface Specifications |