Epson Stylus PHOTO 890 Service Manual page 24

EPSON Stylus PHOTO 890/1280/1290
Pin No. Signal Name
1 -STROBE
2-9 DATA0-DATA7
10 -ACKNLG
11 BUSY
12 PE
13 SLCT
14 -AFXT
17 Chassis GND
18 Logic H
31 -INIT
32 -ERROR
35 +5
36 -SLIN
16,33
GND
19-30
15,34 NC
NOTE: In/Out refers to the direction of signal flow seen from the printer side.
PRODUCT DESCRIPTIONS
Table 1-12. Connector Pin Assignment and Signals
Return
In/Out
GND Pin
19 In The strobe pulse. Read-in of data is performed at the falling edge of this pulse.
The DATA0 through DATA7 signals represent data bits 0 to 7, respectively.
20-27 In
Each signal is at high level when data is logical 1 and low level when data is logical 0.
28 Out This signal is a negative pulse indicating that the printer can accept data again.
29 Out A high signal indicates that the printer cannot receive data.
28 Out A high signal indicates paper-out error.
28 Out Always at high level when the printer is turned on.
30 In Not used.
- - Chassis GND
- Out Pulled up to +5V via 3.9K ohm resister.
The falling edge of a negative pulse or a low signal on this line causes the printer to initialize. Minimum
30 In
50us pulse is necessary.
29 Out A low signal indicates printer error condition.
- Out Pulled up to +5V via 3.3K ohm resister.
30 In Not used.
- - Signal GND
- - Not connected.
Functional Description
Interface
Revision C
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