Epson EPI-4000 Pin assignments for the parallel interface, 7-20 Technical Specifications

Pin assignments for the parallel interface

The following table provides the parallel interface connector pin assignments and describes the interface signals.

Signal	Return
pin	pin	Signal			Direction	Description
					IN
	19			STROBE		The	STROBE	pluse to read the input
						data. The pulse width should be more
						than 0.5µs at the receiving terminal.
						Input data is latched after the falling
						edge of this signal.
2	20	DATA 1			IN	These signals represent information in
3	21		DATA 2		IN	the first to eighth bits of parallel data,
4	22	DATA 3			IN	respectively. Each signal is HIGH when
5	23	DATA 4			IN	data is logical 1 and LOW when it is
6	24		DATA 5		IN	logical 0.
7	25		DATA 6		IN
8	26		DATA 7		IN
9	27		DATA 8		IN
10						About an 11µs pulse. LOW indicate:;
	28	ACKNLG			OUT
						that data has been received and that the
						printer IS ready to accept more data
						This signal is paired with the BUSY
						signal.
11	29	BUSY			OUT	A HIGH signal indicates that the printer
						cannot receive data. The signal goes
						HIGH in the following cases:
						• during data en:ry (for each
						character)
						• when the printer is off line
						• during a printer-error state.
Text	30	PE			OUT	A HIGH signal indicates that the printer
						is out of paper. The signal is effective
						only when the ERROR signal is low.
Text		SLCT			OUT	Pulled up to +5V through 3.3 Kohm
						resistance.

7-20Technical Specifications