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Table 1.2-2 Parallel Communications Connector Signal Line Names
No.
Signal line
1
DSTB
2
DATA 0
3
DATA 1
4
DATA 2
5
DATA 3
6
DATA 4
7
DATA 5
8
DATA 6
9
DATA 7
10
ACK
11
BUSY
12
PE
13
SLCT
14
NC
15
NC
16
GND
17
FG
18
+5 V
I/O
Function
I
Data strobe signal
I/O
Data
I/O
Data
I/O
Data
I/O
Data
I/O
Data
I/O
Data
I/O
Data
I/O
Data
O
Acknowledge signal
O
Busy signal
O
No paper
O
Select signal, output
-
Unused
-
Unused
-
Signal grounding
-
Frame grounding
O
Power supply signal
1.2 Parallel Communications Adapter Specifications
No.
Signal line
19
GND
20
GND
21
GND
22
GND
23
GND
24
GND
25
GND
26
GND
27
GND
28
GND
29
GND
30
GND
31
INIT
32
ERR
33
NC
34
NC
35
NC
36
SLCTIN
I/O
Function
-
Signal grounding
-
Signal grounding
-
Signal grounding
-
Signal grounding
-
Signal grounding
-
Signal grounding
-
Signal grounding
-
Signal grounding
-
Signal grounding
-
Signal grounding
-
Signal grounding
-
Signal grounding
I
Reset signal
O
Error signal
-
Unused
-
Unused
-
Unused
I
Select signal, input
7
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