Epson LQ 1050 User Manual - Page 166
Handshaking by DTR signal or X-on/X-off. The DTR signal, Handshaking, Error handling, Connector
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Interface Specifications Handshaking Handshaking by DTR signal or X-on/X-off. The DTR signal changes to mark-meaning the printer is not ready to receive data-when the number of bytes free in the input buffer goes down to 256. The signal changes to space-meaning that the printer is now ready-when the number of bytes free in the input buffer rises to 528. Error handling All errors are ignored. Connector 6-pin DIN connector. In this table, the direction of signals is given relative to the printer. Pin number Signal 1 TXD 2 DTR 3 RXD 4 NC 5 SG 6 FG Signal direction out out in - Description Transmits data for X-on/X-off Whether or not the printer is ready to receive data Receives data Not used Signal ground level 1Printer chassis ground The pins are arranged as shown below. 8-10