Canon multipass c3000 Service Manual (en)

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Connector signals
The following table lists the signals and input/output status of the pin assignments used for
parallel communication.
Pin No.
Signal
I/O
Pin No.
Signal
I/O
1
-STROBE
Input
19
-STROBE -RET*1
2
DATA1
Input
20
DATA1 -RET
3
DATA2
Input
21
DATA2 -RET
4
DATA3
Input
22
DATA3 -RET
5
DATA4
Input
23
DATA4 -RET
6
DATA5
Input
24
DATA5 -RET
7
DATA6
Input
25
DATA6 -RET
8
DATA7
Input
26
DATA7 -RET
9
DATA8
Input
27
DATA8 -RET
10
-ACKNLG
Output
28
-ACKNLG -RET
11
BUSY
Output
29
BUSY -RET
12
P.E.
Output
30
P.E. -RET
13
SELECT
Output
31
-INIT
Input
14
-AUTO FEED XT*2
Input
32
-ERROR
Output
15
No Connection
33
GND
16
GND
34
No Connection
17
GND
35
+5.0V*3
Output
18
+5V*4
Output
36
-SLCT IN*2
Input
*
1
. All -RETs are connected to GND.
*
2
. These signals are valid only in Epson LQ mode.
*
3
. This signal is connected to +5.0V via 3.3k
Ω
resistor.
*
4
. The level is raised to +5V at 390
Ω
resistor.
Signal descriptions
-STROBE 
When the printer receives a low -STROBE pulse of width greater than 0.5µs from the
computer, it reads the data from the interface and makes the BUSY line high.
DATA
These signals are the 8 bits of parallel data from the computer.  A high level indicates a
logical 1; a low level, a logical 0.  The printer reads the DATA lines when a -STROBE
pulse is received.
-ACKNLG
The ACKNLG pulse tells the computer that the printer has read the data from the
previous -STROBE pulse.  An -ACKNLG pulse is also generated when the printer is
powered on, or at the completion of printer initialization by an -INIT signal requested
from the computer.
Chapter 1: General Description
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