6. Interface |
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<Centronics Parallel> |
<USB “B” Type> |
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| <USB COMBO> | |||
Serial Interface |
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PIN | SIGNAL |
| I/O | DESCRIPTION |
2 | TXD |
| Output | Printer transmit data line |
3 | RXD |
| Input | Printer receive data line |
4, 20 | DTR |
| Output | Printer handshake to host line |
6 | DSR |
| Input | Data Send Ready |
1, 7 | GND | - | System Ground | |
USB Interface |
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PIN | SIGNAL |
| I/O | DESCRIPTION |
1 | +5V |
| - | +5V |
2 | DATA- |
| - | Printer transmit data line |
3 | DATA+ |
| - | Printer transmit data line |
4 | GND |
| - | System Ground |
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