2.4.31.1 Signal Description – Parallel Port Connecter (LPT1)
| Signal |
| Signal Description | ||
| PD[7:0] |
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| Parallel data bus from PC board to printer. The data lines are able to operate in |
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| PS/2 compatible |
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| SLIN# |
| Output line for detection of printer selection. This pin is pulled high internally. | ||
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| SLCT |
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| An active high input on this pin indicates that the printer is selected. This pin is | |
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| pulled high internally. | ||
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| STB# |
| An active low output is used to latch the parallel data into the printer. This pin is | ||
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| pulled high internally. | |||
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| BUSY |
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| An active high input indicates that the printer is not ready to receive data. This pin | |
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| is pulled high internally. | ||
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| ACK# |
| An active low input on this pin indicates that the printer has received data and is | ||
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| ready to accept more data. This pin is pulled high internally. | |||
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| INIT# |
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| Output line for the printer initialization. This pin is pulled high internally. |
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| An active low output from this pin causes the printer to auto feed a line after a line | |
| AFD# |
| is printed. | ||
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| This pin is pulled high internally. | |
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| ERR# |
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| An active low input on this pin indicates that the printer has encountered an error | |
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| condition. This pin is pulled high internally. | ||
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| PE |
| An active high input on this pin indicates that the printer has detected the end of | ||
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| the paper. This pin is pulled high internally. | |||
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2.4.32Power Connector (PWR1)
Signal | PIN |
+5V | 4 |
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GND | 3 |
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GND | 2 |
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+12V | 1 |
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