Epson 5000/5500 LOW, Not used

Interface Specifications

Signal	Return		Signal	Direction	Description
P i n	Pin
33		GND			Same as for pins 19-30.
3 4		NC			Not used.
35				O U T	Pulled up to 5 V through 3.3 Kohm
36				I N	The DC1/DC3 code is valid only when
			SLCT IN
					this signal is HIGH. This signal is always
					LOW.

Note:

The column heading “Direction” refers to the direction of signal flow as viewed from the printer.

“Return” denotes the twisted-pair return, to be connected at signal ground level. For the interface wiring, be sure to use a twisted-pair cable for each signal and to complete the connection on the return side.

All interface conditions are based on the TTL level. Both the rise and fall times of each signal must be less than 0.2 microseconds.

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 BUSY signal is LOW.)

7-12 Technical Specifications