Epson LX-90TM Interface timing, Data Transfer Sequence

4.Data transfer must be carried out by observing the ACKNLG or BUSY signal. (Data transfer to this printer can be carried out only after receipt of the ACKNLG signal or when the level of the BUSY signal is LOW.)

5.Under normal conditions, printer cable pins 11, 12, and 32 are acti- vated when the paper-out condition is detected. The ESCape”8” code disables pins 11 and 32, but not pin 12. Those computers that monitor pin 12 halt printing when the paper is out, making ESCape “8” ineffective.

Data Transfer SequenceInterface timing

Figure D-2shows the timing for the parallel interface.

Figure D-2. Parallel interface timing

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