EPSON Stylus Color 900 Revision C
Product Description Interface 25
*: In and Out refers to the direction of the signal as viewed from the printer.
Table 1-12. 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 DATA0 20 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.
3DATA1 21
4DATA2 22
5DATA3 23
6DATA4 24
7DATA5 25
8DATA6 26
9DATA7 27
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.
