Tektronix 480X user manual Printer ports, Parallel port signal descriptions

Technical Notes A

Printer ports

This section includes information on the parallel and Ethernet ports. Information on the serial port is available on the CD-ROM, on the HAL and EuroHAL automated fax systems, and through the Internet. Refer to ÒAt a glance: electronic addresses and telephone numbersÓ on page 6-1.

Parallel port

The printer has a standard unidirectional, byte-wide parallel, synchronous port. When you use the parallel port, be sure to type this command at the PC (if LPT1 is not available, use LPT2):

MODE LPT1:,,P

The table shows the parallel portÕs connected pins. Other pins are not connected. Signal names ending with a dash (-) are asserted low.

Parallel port signal descriptions

Signal name	Pin #	Return	Signal	Description
		pin	source
DSTRB-	1	19	Host	Pulsed low for .5
				microseconds;
				clocks data into printer
DATA1	2	20	Host	Positive true data input
DATA2	3	21	Host	Positive true data input
DATA3	4	22	Host	Positive true data input
DATA4	5	23	Host	Positive true data input
DATA5	6	24	Host	Positive true data input
DATA6	7	25	Host	Positive true data input
DATA7	8	26	Host	Positive true data input
DATA8	9	27	Host	Positive true data input
ACK-	10	28	Printer	Data acknowledge pulsed low
				for 3-4 microseconds; ends
				bus transaction

User Manual A-3