Star Micronics 150 User Manual

Parallel Port

Page 116

Rev G

12/14/99

The parallel printer interface is a 25-pin D-shell connector. The pin out is such that the printer
will interface to a standard personal computer parallel printer interface with a one to one cable.

The INIT\ (initialize) printer input acts as a hardware reset to the printer. This signal must be
inactive (high) for about four seconds before the printer will respond to information input.

The paper error signal is asserted by the printer whenever the journal paper is exhausted and an
attempt is made to print on the journal. The paper error signal is also asserted in response to
inquire (ENQ) commands in parallel, non-IEEE 1284 mode.

The ERR\ signal is asserted if a head jam occurs or if the paper error signal is asserted for a true
paper error. Note: The AUTOFD (auto feed, Pin 14) and SLIN (Select input, Pin 17) signals are
not used by the Series 150 Printer in parallel, non-IEEE 1284 mode.

Pin 1

STROBE

Clock data to printer

Host to Printer

Pin 2-9

D0 - D7

Data

Host to Printer

Pin 10

ACK\

Printer accepted cata

Printer to Host

Pin 11

BUSY

Printer is busy

Printer to Host

Pin 12

PE

Paper out/status

Printer to Host

Pin 13

SLCT

Printer selected

Printer to Host

Pin 14

AUTOFD

Auto feed paper

Host to Printer

Pin 15

ERR\

Printer error

Printer to Host

Pin 16

INIT\

Initialize the printer

Host to Printer

Pin 17

SLIN

Select printer

Host to Printer

Pin 18-25

GND

Ground

Voltage levels

0 V and +5 V (nominal)

Logic levels

Logic 1

Driver

+2.4 V to +5 V

Receiver

+2.0 V to +5 V

Logic 0

Driver

0 V to +0.4 V

Receiver

0 V to +0.8 V

Driver

+2.4 V to +5 V

Current requirements

Logic 1

Source 0.25 ma at +2.4 V

Logic 0

Sink 16 ma

Line termination

Data and control

3.3 K ohm to +5 V

Strobe

1.2 K ohm to +5 V