Ampro Corporation XTX 820 manual Drv, Mot

Chapter 3			Hardware
	Pin #	Signal	Description
	80	PD0	Parallel Port Data 0 – This pin (0 to 7) provides a parallel port data signal
		INDEX*	and is the printer data LSB.
			Floppy Index –Detects when the head is positioned over the beginning of the
			track.
	81, 82	VCC	DC Power – +5V +/- 5%
	83	RXD1	Receive Data 1 – Serial port 1 receive data in.
	84	ACK*	Parallel Acknowledge * – This is a status input signal from the printer. A
			Low State indicates it has received the data and is ready to accept new data.
		DRV*	Floppy Drive Select 1 – This signal selects drive 1.
	85	RTS1*	Request To Send 1 – Indicates Serial port 1 is ready to transmit data. Used
			as hardware handshake with CTS1 for low level flow control.
	86	BUSY	Parallel Busy – This is a status input signal from the printer. A high state
			indicates the printer is not ready to accept data.
		MOT*	Floppy Motor Control 1 – This signal selects motor on drive 1.
	87	DTR1*	Data Terminal Ready 1 – Indicates Serial port 1 is powered, initialized, and
			ready. Used as hardware handshake with DSR1 for overall readiness.
	88	PE	Parallel Paper End – This is a status input signal from the printer. A high
			state indicates it is out of paper.
		WDATA*	Floppy Write Data – Encoded data to the drive for write operations.
	89	DCD1*	Data Carrier Detect 1 – Indicates external serial device is detecting a carrier
			signal (i.e., a communication channel is currently open). In direct connect
			environments, this input is driven by DTR1 as part of the DTR1/DSR1
			handshake.
	90	SLCT*	Parallel Select – This is a status output signal from the printer. A high state
			indicates it is selected and powered on.
		WGATE*	Floppy Write Gate – Signals drive to enable current flow in the write head.
	91	DSR1*	Data Set Ready 1 – Indicates external serial device is powered, initialized,
			and ready. Used as hardware handshake with DTR1 for overall readiness.
	92	MSCLK	Mouse Clock – This signal clocks the data from the mouse.
	93	CTS1*	Clear To Send 1 – Indicates external serial device is ready to receive data.
			Used as hardware handshake with RTS1 for low level flow control.
	94	MSDAT	Mouse Data – This signal provides the mouse data.
	95	TXD1	Transmit Data 1 – Serial port 1 transmit data out
	96	KBCLK	Keyboard Clock – This signal clocks the data from the keyboard.
	97	RI1*	Ring Indicator 1 – Indicates external serial device is detecting a ring
			condition. Used by software to initiate operations to answer and open the
			communications channel.
	98	KBDAT	Keyboard Data – This signal provides the keyboard data
	99	GND	Ground
	100	GND	Ground

Notes: The shaded area denotes power or ground. The signals marked with * = Negative true logic.

XTX 820 Reference Manual 45