Tektronix manual 12Phaser 340 Color Printer

ATechnical Notes

Parallel port signal descriptions (cont'd.)

Pin	Signal mode names:	Return	Signal	Description
	Compatibility/Nibble	pin	source
14	nInit/nHostRTS	32	Host	C mode: Negative true = reset
				interface
				N mode: Set positive
15	nStrobe/HostClk	33	Host	C mode: Negative true = transfer
				data into printer input latch
				on rising edge
				N mode: Negative true = transfer
				Extensibility Request
				value into printer input
				latch on rising edge
16	nSelectIn/1284 Active	34	Host	C mode: Negative true = select
				printer
				N mode: Used in conjunction with
				HostBusy for 1284
				hardware handshaking
17	nAutoFd/HostBusy	35	Host	C mode: Not used
				N mode: Used in conjunction with
				1284 Active for 1284
				hardware handshaking
18	Host Logic High		Host	Positive true = host signals valid
				Negative true = host signals invalid
36	Peripheral Logic High		Printer	Positive true = printer on
				Negative true = printer off

A-12Phaser 340 Color Printer