Epson LQ-950 User Manual - Page 281

Interface Specifications Your printer is equipped with both a parallel and a serial interface. For specifications on optional interfaces, see the manuals provided with the interfaces. Parallel Interface Pin assignments for the parallel interface Connector pin assignments and a description of their respective interface signals are shown in the following table. Signal Return Pin Pin Signal Direction Description 1 19 STROBE I N STROBE pulse to read data. Pulse width must be more than 0.5 microseconds at the receiving terminal. 2 20 DATA 1 IN These signals represent information of 3 21 DATA2 IN the 1st to 8th bits of parallel data, 4 22 DATA 3 IN respectively. Each signal is at HIGH 5 23 DATA 4 IN level when data is logical 1 and LOW 6 24 DATA 5 IN when it is logical 0. 7 25 DATA6 IN 8 26 DATA 7 IN 9 27 DATA 8 IN 10 28 ACKNLG OUT About an 11 -microsecond pulse. LOW indicates that data has been received and that the printer is ready to accept more data. 11 29 A HIGH signal indicates that the printer cannot receive data. The signal goes HIGH in the following cases: 1) During data entry (ea. char. time) 2) During printing 3) When off line 4) During printer-error state 8-10 Technical Specifications