Epson FilmScan 200 Service Manual page 17

FilmScan 200
Table 1-2. Signal and Connector Pin Assignment for Parallel Interface
Pin No. Signal Name
1 /STROBE
2-9 DATA0-7
10 /ACKNLG
11 BUSY
12 PE
13 SLCT
14 /AFXT
31 /INIT
32 /ERROR
36 /SLIN
18 Logic H
35 +5V
17 Chassis GND
16,33,19,30 GND
15,34 NC
Note: In/Out refers to the direction of signal flow from the printer's point of view.
1-8
Return GND pin In/Out
19 In
20-27 In
28 Out
29 Out
28 Out
28 Out
30 In
30 In
29 Out
30 In
- Out
- Out
- -
- -
- -
Functional Description
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. Each signal is at
high level when data is logical 1 and low level
when data is logical 0.
This signal is a negative pulse indicating that
the printer can again accept data.
A high signal indicates that the printer cannot
receive data.
A high signal indicates paper-out error.
Always at high level when the printer is
powered on.
Not used.
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.
A low signal indicates printer error condition.
Not used.
Pulled up to +5V via 3.9K ohm resistor.
Pulled up to +5V via 3.3K ohm resistor.
Chassis GND.
Signal GND.
Not connected.
REV.-A