Epson 440 User Manual
Page 26
EPSON Stylus Color 440/640/740
Revision A
Chapter 1
Product Description
26
Table 1-10. Parallel I/F Forward Channel
Pin No.
Signal
Name
Return
GND Pin
In/Out
Functional Description
1
/STROBE
19
I
The strobe pulse. Read-in of data is
performed at the falling edge of this
pulse.
2-9
DATA0-7
20-27
I
The DATA0 through DATA7 signals
represent data bits 0 to 7, respectively.
Each signal is at high level when data is
logical 1 and low level when data is
logical 0.
10
/ACKNLG
28
O
This signal is a negative pulse indicating
that the printer can again accept data.
11
BUSY
29
O
A high signal indicates that the printer
cannot receive data.
12
PE
28
O
A high signal indicates paper-out error.
13
SLCT
28
O
Always at high level when the printer is
powered on.
14
/AFXT
30
I
Not used.
31
/INIT
30
I
The falling edge of a negative pulse or a
low signal on this line causes the printer
to initialize. Minimum 50 us pulse is
necessary.
32
/ERROR
29
O
A low signal indicates printer error
condition.
36
/SLIN
30
I
Not used.
18
Logic H
----
O
Pulled up to +5V via 3.9K ohm resistor.
35
+5V
----
O
Pulled up to +5V via 3.9K ohm resistor.
17
Chassis
GND
----
---
Chassis GND.
16,33,
19-30
GND
----
---
Signal GND.
15,34
NC
----
---
Not connected.
Note) In and Out refer to the direction of signal flow from the printer’s point of view.