Epson LX-90TM D, Pin, tion, Direc, Return, Signal, Interface, Description, S T R O B E, Table D-3.Pins and signals

InterfaceThe PIC uses an &bit, Centronics®-compatible, parallel interface.

Connector pin assignments and a description of respective interface signals are shown in Table D-3.

Table D-3. Pins and signals

	Return	Signal	Direc.	Description
	Pin		tion
1
	19	S T R O B E	IN	STROBE pulse to read data in. Pulse
				width must be more than 0.5
				microseconds at the receiving
				terminal.
2	20	DATA 1	IN	These signals represent information of
3	21	DATA 2	IN	the 1st to 8th bits of parallel data,
4	22	DATA 3	IN	respectively Each signal is at HIGH
5	23	DATA 4	IN	level when data is logical 1 and LOW
6	2 4	DATA 5	IN	when it is logical 0.
7	25	DATA 6
8	26	DATA 7	IN
9	27	DATA 8	IN
1 0	28		OUT	Approximately 12-microsecond 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 that the
				printer cannot receive data. The signal
				goes HIGH in the following cases:
				1) During data entry (ea. char. time)
				2) During printing
				3) When Off-Line
				4) During printer-error state
12	30	PE	OUT	A HIGH signal indicates that the
				printer is out of paper.

D - 4