Parallel Connector

Use the 25-hole parallel connector to attach a parallel device to the computer. The parallel connector is used primarily for printers. The parallel connector transmits data in parallel format, where 8 data bits (one byte) are sent simultaneously over eight separate lines.

The parallel connector can also be configured for compatibility with the PS/2 standard. Support for the EPP feature improves network adapter performance (adapters connect to the computer's parallel connector and require the appropriate software drivers from the adapter's manufacturer).

If you reconfigure your hardware, you may need pin number and signal information for the parallel connector.

Pin

Signal

I/O

Definition

 

 

 

 

 

 

1

STB#

I/O

Strobe

 

 

 

 

 

 

2

D0

I/O

Printer data bit 0

 

 

 

 

 

 

3

PD1

I/O

Printer data bit 1

 

 

 

 

 

 

4

PD2

I/O

Printer data bit 2

 

 

 

 

 

 

5

PD3

I/O

Printer data bit 3

 

 

 

 

 

 

6

PD4

I/O

Printer data bit 4

 

7

PD5

I/O

Printer data bit 5

 

 

 

 

 

 

8

PD6

I/O

Printer data bit 6

 

 

 

 

 

 

9

PD7

I/O

Printer data bit 7

 

 

 

 

 

 

10

ACK#

I

Acknowledge

 

 

 

 

 

 

11

BUSY

I

Busy

 

 

 

 

 

 

12

PE

I

Paper end

 

 

 

 

 

 

13

SLCT

I

Select

 

 

 

 

 

 

14

AFD#

O

Automatic feed

 

15

ERR#

I

Error

 

 

 

 

 

 

16

INIT#

O

Initialize printer

 

 

 

 

 

 

17

SLIN#

O

Select in

 

 

 

 

 

 

18-25

N/A

N/A

Ground signal

 

 

 

 

 

 

Shell

N/A

N/A

Frame ground

 

 

 

 

 

 

 

 

 

 

 

Docking Connector

Use this connector to attach your computer to the optional docking device.

Pin

Signal

Pin

Signal

Pin

Signal

Pin

Signal

 

 

 

 

 

 

 

 

1

STRB#/5V

51

HSYNC

101

VGA_GRN

151

GND

2

PD0

52

VSYNC

102

GND

152

CLK_SPCI

 

 

 

 

 

 

 

 

3

PD1

53

GND

103

VGA_RED

153

GND

 

 

 

 

 

 

 

 

4

PD2

54

DOCKED

104

GND

154

SAD0

 

 

 

 

 

 

 

 

5

PD3

55

USB_VD1+

105

VGA_BLU

155

SAD1

 

 

 

 

 

 

 

 

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Dell 4100 specifications Parallel Connector, Docking Connector, Pin Signal