Epson Stylus Color 440, Руководство по обслуживанию

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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.