6. Interface
This appendix provides detailed specifications for the printer’s standard serial interface.
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6.1 Pins and Signal Names
Pin | Signal | Direction | Function |
No. | Name |
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1 | FG | — | Frame ground |
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2 | TXD | OUT | Transmission data |
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3 | RXD | IN | Receive data |
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4 | RTS | OUT | Same as DTR signal |
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5 | N.C. |
| Not connected |
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6 | DSR | IN | • DIP Switch 9 = OFF |
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| In DTR/DSR communication mode when Memory |
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| receive from host is enabled or disabled. |
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| Space: Receive enabled |
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| Mark: Receive disabled |
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| This signal is not checked in the |
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| • DIP Switch 9 = ON |
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| This signal used for external reset. Printer is reset whenever signal is in mark state with |
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| pulse width of 1mS or more. |
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7 | SG |
| Signal ground |
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8 | N.C. |
| Not connected |
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