Ampro Corporation 5001692A Slin, Step, PD3, Rdata, PD4, PD5, PD6, PD7, DS1, MTR1, Wdata, Wgate

Chapter 3			Hardware
	Pin #	Signal	Description
	8	SLIN	Select In – This output signal is used to select the printer. I/O pin in ECP/EPP
		STEP	mode.
			Step – Low step pulse for each track-to-track movement of the head.
	9	PD3	Parallel Port Data 3 – This pin (0 to 7) provides parallel port data signals.
		RDATA	Read Data – Raw serial bit stream from the drive for read operations.
	10	GND	Digital Ground
	11	PD4	Parallel Port Data 4 – This pin (0 to 7) provides parallel port data signals.
		DskChg	Disk Change – Senses the drive door is open or the diskette has been changed
			since the last drive selection.
	12	GND	Digital Ground
	13	PD5	Parallel Port Data 5 – This pin (0 to 7) provides parallel port data signals.
	14	GND	Digital Ground
	15	PD6	Parallel Port Data 6 – This pin (0 to 7) provides parallel port data signals.
	16	GND	Digital Ground
	17	PD7	Parallel Port Data 7 – This pin (0 to 7) provides parallel port data signals.
	18	GND	Digital Ground
	19	Ack*	Acknowledge* – This is a status output signal from the printer. A Low State
		DS1	indicates it has received the data and is ready to accept new data.
			Drive Select 1 – Selects floppy drive 1.
	20	GND	Digital Ground
	21	Busy*	Busy* – This is a Status output signal from the printer. A High State indicates
		MTR1	the printer is not ready to accept data.
			Motor Control 1 – Selects or enables the motor on floppy drive 1.
	22	GND	Digital Ground
	23	PE	Paper End – This is a status output signal from the printer. A High State
		WDATA	indicates it is out of paper.
			Write Data – Encoded data to the drive for write operations.
	24	GND	Digital Ground
	25	Slct	Select – This is a status output signal from the printer. A High State indicates
		WGATE	it is selected and powered on.
			Write Gate – Signal to the drive to enable current flow in the write head.
	26	Key/NC	Key Pin/Not Connected

Notes: The shaded area denotes power or ground. The signals marked with * indicate active low.

32 Reference Manual CoreModule 420