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In a cable designed for fast bi-directional use (for example to a scanner), the grounding arrangements are defined to the IEEE-1284 standard. Each signal has
its own return path and connections are made with twisted pairs with an overall screen.
All signals are TTL, '/' = active low, all others active high
|
/Strobe (In/Out) |
1 |
|
D0 (In/Out) |
2 |
|
D1 (In/Out) |
3 |
|
D2 (In/Out) |
4 |
|
D3 (In/Out) |
5 |
|
D4 (In/Out) |
6 |
|
D5 (In/Out) |
7 |
|
D6 (In/Out) |
8 |
|
D7 (In/Out) |
9 |
|
/Ack (In) |
10 |
|
Busy (In) |
11 |
|
Paper End (In) |
12 |
|
Select (In) |
13 |
|
/Auto Feed (Out) |
14 |
|
/Error (In) |
15 |
|
/Init (Out) |
16 |
|
/Select (Out) |
17 |
|
Ground |
18 |
|
Ground |
19 |
|
Ground |
20 |
|
Ground |
21 |
|
Ground |
22 |
|
Ground |
23 |
|
Ground |
24 |
|
Ground |
25 |
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