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The parallel port (LPT1) is a 2-row 26-pin male connector. Signals with# symbol
are low active.
LPT1
2
1
1
STB#
2
PD0
3
PD1
4
PD2
5
PD3
6
PD4
7
PD5
8
PD6
9
PD7
10
ACK#
11
BUSY
12
PE
13
SLCT
14
AFD#
15
ERROR#
16
INIT#
17
SLIN#
18-25 GND
26
VCC
O
Strobe
I/O
Data bit 0
I/O
Data bit 1
I/O
Data bit 2
I/O
Data bit 3
I/O
Data bit 4
I/O
Data bit 5
I/O
Data bit 6
I/O
Data bit 7
I
Acknowledge
I
Device busy
I
Paper empty
I
Device selected
O
Auto line feed
I
Error condition
O
Initialization (Reset)
O
Select In
-
Ground
O
+5 Volt
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