Xerox 4213 manual Centronics signals and pin assignments, Pin Direction Signal Description

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Centronics signals and pin assignments

	Table 1-2 describes Centronics 100 signals and pin assignments.
	Table 1-2.		Centronics signals and pin assignments
Pin	Direction	Signal		Description
1	To printer	STROBE L		STROBE pulse low to read data. A strobe
				low signal raises BUSY line to high.
2	To printer	DATA BIT 11
3	To printer	DATA BIT 21
4	To printer	DATA BIT 31
5	To printer	DATA BIT 41
6	To printer	DATA BIT 51
7	To printer	DATA BIT 61
8	To printer	DATA BIT 71
9	To printer	DATA BIT 81
10	From printer	ACKNLG L		ACKNLG pulse low indicates data was
				received and printer is ready to receive
				more data.
11	From printer	BUSY H		BUSY ªhighª indicates the printer cannot
				receive data, (buffer is full). BUSY high
				occurs when an error condition exists.
12	From printer	PE H		Ground
13	From printer	SLCT H		A high signal indicates the printer is in
				the select state.
				A low signal occurs when the printer is
				deselected or if an error condition exists.
14				Ground (standard Centronics)
15	Printer to stunt			2 MHz Field stunt box clock. The stunt
	box			box is not provided by Xerox.
16	0 volts			Logic ground

1-4 XEROX 4213 LASER PRINTER PROGRAMMER REFERENCE