Epson 800 Series manual 71

The table below provides the connector pin assignments and describes their respective interface signals.

Slgnal	Return	Signal	DIrectIon	Description
Pin	Pln
1	19		IN
		STROBE		STROBE	pulse to read data.
				Pulse width must be more
				than 0.5 microseconds at
				the receiving terminal.
	20	DATA 1	IN	These signals represent
	21	DATA 2	IN	information of bits 1 to
	22	DATA 3	IN	to 8 of parallel
	23	DATA 4	IN	data, respectively.
	24	DATA 5	IN	Each signal is at HIGH
	25	DATA 6	IN	level when data is
	26	DATA 7	IN	logical 1 and LOW when
	27	DATA 8	IN	it is logical 0.
10	28		OUT	About a 1 O-microsecond
		ACKNLG
				pulse. LOW indicates that
				data has been received and
				that the printer is ready
				to accept more data.
11	29	BUSY	OUT	A HIGH signal indicates the
				printer cannot receive data.
				The signal goes HIGH in the
				following cases:
				1) During data entry
				(for each character)
				2) During printing
				3) During an error state
	30	PE	OUT	A HIGH signal indicates the
				printer is in a paper-out
				state or in an error state.
		SLCT	OUT	Pulled up to 5 V through
				1 .O kR resistance
		AUTO	IN	When this signal is LOW, the
		F		paper is automatically fed
				one line after printing.
				(The signal level can be
				fixed to this by setting
				Auto Line Feed to on in the
				default-settings mode.)

A-8 Appendix