Epson Stylus Color 500, User Manual

Page: 137 / 165

Pin assignments
Signal
Pin Return
Pin
Signal Direction Description
1 19 STROBE IN STROBE pulse to read data.
2
3
4
5
6
7
8
9 20
21
22
23
24
25
26
27 DATA 0
DATA 1
DATA 2
DATA 3
DATA 4
DATA 5
DATA 6
DATA 7 IN
IN
IN
IN
IN
IN
IN
IN These signals represent
information in bits 0 to 7 of
parallel data respectively.
Each signal is at HIGH level
when data is logical 1 and
LOW when it is logical 0.
10 28 ACKNLG OUT About a 5-
µ
s pulse. LOW
indicates data has been
received and the printer is
ready to accept more data.
11 29 BUSY OUT A HIGH signal indicates the
printer cannot receive data.
The signal goes HIGH in the
following cases:
1) During data entry
(for each character)
2) During initialization
3) During self test,
demonstration, and
default-setting printing
4) During a printer-error state
12 28 PE OUT A HIGH signal indicates the
printer is in a paper-out state
or in an error state
13 28 SLCT OUT Always at high when printer is
on
14 30 AUTO
FEED
XT
IN Not used
15 — NC — Not connected
16 — GND — Logic ground level
17 — CHASSIS
GND
— Printer’s chassis ground,
which is connected to the
logic ground
L Elbe+
A5 size Appendix A
3-25-96 MT, pass 4
A-10
Technical Specifications