Epson 1000 A - 8 A p p e n d i

Signal		Return		Signal	Direction		Description
Pin		Pin
1		19			IN		pulse to read data.
				STROBE		STROBE
						Pulse width must be more than
						0.5 ps at the receiving terminal.
2		20		DATA 1	IN	These signals represent
3		21		DATA 2	IN	information in bits 1 to 8 of
4		22		DATA 3	IN	parallel data respectively. Each
5		23		DATA 4	IN	signal is at HIGH level when
6		24		DATA 5	IN	data is logical 1 and LOW when
7		25		DATA 6	IN	it is logical 0.
8		26		DATA 7	IN
9		27		DATA 8	IN
10		28			OUT	About an approx. lo-l.ts pulse.
				ACKNLG
						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) When the PAUSE button is
						pressed
						4) During an error state
12		30		PE	OUT	A HIGH signal indicates the
						printer is out of paper.
13		-		SLCT	OUT	Pulled up to 5 V through 1 .O kR
						resistance
14	,	-		AUTO	IN	When this signal is LOW, the
				FEED		paper is automatically fed one
				i?		line after printing.
15		-		NC		Not used
16		-		GND	-	Logic ground level
17		-	’	CHASSIS	-	Printer’s chassis ground, which is
				GND		isolated from the logic ground

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A - 8 A p p e n d i x