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Connector Pin Assignments and Signals
Table 1-16. Connector Pin Assignments and Signals (Forward Channel)
Pin No.
Signal Name
1
1.
/STROBE
2-9
2.
DATA 0-7
10
3.
/ACKNLG
11
4.
BUSY
12
5.
PE
13
6.
SLCT
14
7.
/AFXT
31
8.
/INIT
32
9.
/ERROR
36
10.
/SLIN
18
11.
Logic H
35
12.
+5V
17
13.
Chassis
GND
16,33,19-30
14.
GND
15,34
15.
NC
Note: 1. / at the beginning of a signal means active LOW.
2. The I/O column indicates the direction of the signal as viewed from the printer.
Rev. A
Return
I/O
GND Pin
19
I
The STROBE pulse. Reading in of data is
performed at the falling edge of this pulse.
20-27
I
The DATA 0 to DATA 7 signals represent
data bits 0 to 7, respectively. Each signal is
at a HIGH level when data is logical 1 and a
LOW level when data is logical 0.
28
O
This signal is a negative pulse indicating that
the printer can again accept data.
29
O
When this signal is at a HIGH level, the
printer is not ready to accept data.
28
O
When this sign is at a HIGH level, the paper
empty status is detected.
28
O
Always at HIGH level when the printer is
powered on.
30
I
Not used.
30
I
The falling edge of a negative pulse or a
LOW signal on this line causes the printer to
initialize. Minimum 50 µs pulse is
necessary.
29
O
When the printer detects an error, this
signal goes LOW.
30
I
Not used.
O
Pulled up to +5 V via 3.9K-ohm resistor.
O
Pulled up to +5 V via 3.3K-ohm resistor.
Chassis ground.
Signal ground.
Not connected.
Product Description
Description
1-15

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