PC Parallel Port Pin-Out


25 Pin D-Sub Connector PinOut
Pin # Pin Name Pin Description and Function
1 /STROBE Strobe
2 D0 Data Bit 0
3 D1 Data Bit 1
4 D2 Data Bit 2
5 D3 Data Bit 3
6 D4 Data Bit 4
7 D5 Data Bit 5
8 D6 Data Bit 6
9 D7 Data Bit 7
10 /ACK Acknowledge
11 BUSY Busy
12 PE Paper End
13 SEL Select
14 /AUTOFD Autofeed
15 /ERROR Error
16 /INIT Initialize
17 /SELIN Select In
18 GND Strobe Ground
19 GND Data bit 1 and 2 Ground
20 GND Data bit 3 and 4 Ground
21 GND Data bit 5 and 6 Ground
22 GND Data bit 7 and 8 Ground
23 GND Busy and Fault Ground
24 GND Paper out, Select, and Acknowledge Ground
25 GND AutoFeed, Select input and Initialize Ground

36 Pin Centronic Connector PinOut
Pin # Pin Name Pin Description and Function
1 /STROBE Data Strobe (May be called /PSTROBE, HostCLK)
2 D0 Data Bit 0
3 D1 Data Bit 1
4 D2 Data Bit 2
5 D3 Data Bit 3
6 D4 Data Bit 4
7 D5 Data Bit 5
8 D6 Data Bit 6
9 D7 Data Bit 7
10 /ACK Acknowledge receipt of Data (or /PACK, PtrCLK)
11 BUSY Strobe received, Waiting on Acknowledge (or /PBUSY, PtrBusy)
12 PAPER ERROR Paper Out / Paper Error (AckDataReq)
13 SELECT Out Daisy-Chain Device Select Signal (May be tied high in some Printers)
14 /AUTOFEED Auto-Feed paper, Not used with PostScript printer (HostBusy)
15 Select IN Daisy-Chain IN
16 Signal GND Logic Ground
17 CHASSIS GND Shield Ground
18 +5 V PULLUP +5 V DC (50 mA max)
19 GND Signal Ground (Strobe Ground)
20 GND Signal Ground (Data 0 Ground)
21 GND Signal Ground (Data 1 Ground)
22 GND Signal Ground (Data 2 Ground)
23 GND Signal Ground (Data 3 Ground)
24 GND Signal Ground (Data 4 Ground)
25 GND Signal Ground (Data 5 Ground)
26 GND Signal Ground (Data 6 Ground)
27 GND Signal Ground (Data 7 Ground)
28 GND Signal Ground (Acknowledge Ground)
29 GND Signal Ground (Busy Ground)
30 /GNDRESET Reset Ground
31 /RESET Cancel Current Job (May be called /PRIME)
32 /FAULT Fault with Printer (Low when offline)
33 0 V Signal Ground
34 n/c Not used
35 +5 V +5 V DC
36 /SLCT IN Select In; Taking low or high sets printer on line or off line