OKI ML3390 01091308*01256402 User Manual

D-2

Appendix D: Interface Data

1

DATA STROBE

To printer

When the signal changes from low
to high level, input data is sampled.

2-9

DATA BIT 1-8

To printer

Input data lines. The High level
represents 1, the Low level repre-
sents 0

10 ACKNOWLEDGE

From printer

The High level of this signal
indicates completion of data input
or function operation.

11

BUSY

From printer

The High level of this signal
indicates that the printer cannot
receive data. The low level of the
signal indicates that the printer is
ready for receiving data.

12

PAPER END

From printer

The High level of this signal
indicates that a paper end has
been detected.

13

SELECT

From printer

The High level of this signal
indicates that the printer is in the
select mode (ON LINE).

14*

AUTOFEED

To printer

In EPSON emulation a Low level
of the signal activates the auto line
feed.

15

--

--

Not assigned.

16

0 V

--

Signal ground

17CHASSIS GROUND

--

Frame ground

18*

+ 5 V

From printer

+ 5-volt supply (max. 50 mA).

19-30

0 V

--

Twisted pair return for pins 1 to 11.

31 **

I-PRIME

To printer

Signal Low: Printer controller is
initialised. The low level should be
held for more than 0.5 ms.

32

FAULT

From printer

When the paper end is detected this
signal changes from High to Low.

33

0 V

--

Signal ground

34

--

--

Not assigned.

35

--

--

Not assigned.

36

SELECT-IN

To printer

The High level of this signal
indicates that the printer can only
be selected and deselected using
DC1 and DC3 control codes.

*

Pin 14 and 18 can be activated/deactivated by menu item Auto Feed XT or Pin
18

.

Pin Description