Star Micronics LC-20 user manual 102

Thefollowingdescribesthepinoutof theparallel(Centronics-type)inter- face connector(signalswhich are low when activeare overlined):

	Pin	Name	Function	I
I	1	I STROBE	Goes fIom high to low (for 20.51.M)when active
	2	I DATAO	I Hi~hwhenactive	I
	~	DATA1	High when active
I	4	DATA2	High when active	I
	5	t DATA3	I Hi~hwhen active
	6	DATA4	High when active
	7	DATA5	High when active
	8	DATA6	High when active
	9	DATA7	High when active
	10	ACK	5ys low pulse acknowledges receipt of data
	11	BUSY	Low when printer ready to receive data
	12	PAPER	High when paper out. Can be disabled with DIP switch
			setting
	13	SELECT	High when urinter is on-line	I
I	14.15	I N/C	I
			Chassisground(Isolatedfromsignalground)
WND~~~~utfrom~intc
	19-30	GND	Twisted pair ground return
	31	RESET	When this input signal is low, printer is reset
I	32	ERROR	Outputs low when printer cannot continue, due to an error	I
	33	I EXT GND	I External mound
	34,35	N/C
	36	SELECT IN	Always high

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