Electronics > Beginners
D25 Parallel port pinout?
(1/1)
Jackster:
Am I right in saying that this D25 to D25 has pin 1 through 13 and 14 through 25 reversed on one end?
As in pin 1 goes to pin 13, pin 5 goes to 9, pin 15 goes to 24 and pin 20 goes to pin 19?

Is this a standard parallel connection?

helius:
No. By looking at the back of the shell you cannot see the gender of the connectors, nor the pin numbering. If one connector is male and the other female, it is a straight-through cable (1-1, 2-2, ... 25-25).
boffin:
Somebody already beat me to it, but what you're probably looking at is a plug and a socket, if you plug them together you'll see they all go straight through

The standard Parallel printer port interface is
DB25         Centronics (57-30360 plug)
1              1    Strobe
2-9           2-9  Data0 -> Data7
10            10   ACK
11            11   Busy
12            12   Paper Out
13            13   Select In
14            14   Autofeed
15            32   Error
16            31   Reset
17            36   Select
18-25       19-26 (Grounds)

(oh dear god, I just did the pin-pin mapping off the top of my head - some useless knowledge buried in there.  I double checked it, but it was right)
Jackster:

Yep male and female. The photos I was sent showed 2 male ends  |O
In Vacuo Veritas:

--- Quote from: helius on August 30, 2018, 05:33:09 pm ---No. By looking at the back of the shell you cannot see the gender of the connectors, nor the pin numbering. If one connector is male and the other female, it is a straight-through cable (1-1, 2-2, ... 25-25).

--- End quote ---

Uh, of course you can. The one with the embossings is the outer hood, this is the male part.

https://buildyourcnc.com/Item/electronicsandmotors-connector-male-dsub-DB25-ribbon
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