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Ports and Connectors: Dell Inspiron 7500
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Ports and Connectors: Dell™
Inspiron™ 7500
I/O Connectors
Figure 1. Input/Output (I/O) Connectors
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1
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Parallel connector
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2
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Serial connector
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3
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Monitor connector
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4
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TV-out S-video connector
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5
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Docking connector
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6
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USB connector
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7
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PS/2 connector
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8
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Infrared port
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The infrared port is IrDA 1.1-compliant.
An infrared data stream is transmitted through a lens in the computer, up to
a distance of 1 meter (m), and received by a compatible computer, printer, mouse,
or remote control. The infrared port allows the transfer of files from one computer
to another infrared-compatible device, without using cable connections. Dell
has installed data communications software for you to use with your infrared
port. You can also use other commercially available infrared-capable application
programs.
For information on configuring the
standard infrared drivers that come with Microsoft® Windows® 98, see
your operating system documentation. To install the fast infrared drivers provided
by Dell, see the instructions in the readme.doc file on your
System Software CD.
If for some reason you need to change
the infrared port address, be careful not to create a conflict with the addresses
of the serial port or the parallel port.
To use the infrared
port, point the computer’s infrared port directly at the infrared port
of the compatible device. Infrared devices transmit data in a 30� cone of infrared
light (see Figure 2). Start the data communications software on both devices,
and then begin transferring files. Read the documentation that came with your
compatible device to make sure you operate it correctly.
Figure 2. 30� Cone
of Infrared Light
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NOTE: Make sure that there
are no books, papers, or other objects between the two infrared devices
and that the two devices are within the 30�
cone. |
The Modem Port option
appears only if your computer has an integrated modem. This option allows you
to map the address of the port to avoid address conflicts with other devices.
When this option is set to Customized
(the default), the base I/O address/interrupt request (IRQ) is 2F8 IRQ3, the
configuration port is 130, and the 16-bit direct memory access (DMA) channel
is DMA 6.
Set Modem Port to
Off if you want to disable the port and free its assigned address
for another device. When this option is set to Auto, the operating
system or the basic input/output system (BIOS) configures the port automatically.
USB Connector
Use the Universal Serial Bus (USB)
connector (see Figure 3) to attach one or more USB devices, such as a mouse,
to the computer. USB is a peripheral bus standard that enables automatic detection
of USB-compliant peripheral devices.
Figure 3. Pin Assignments for the
USB Connector
Table 1. USB Connector Pin Assignments
| Pin |
Signal |
Definition |
| 1 |
VCC |
Cable power |
| 2 |
-Data |
N/A |
| 3 |
+Data |
N/A |
| 4 |
Ground |
Cable ground |
Use the 9-pin serial connector (see
Figure 4) to attach a serial device to the computer. The serial port passes
data in serial format (1 bit at a time over one line). This port supports a
variety of devices, including a serial mouse, that require serial data transmission.
If you reconfigure your hardware, you may need pin number and signal information
for the serial connector.
Figure 4. Pin Assignments for the
Serial Connector
Table 2. Serial Connector Pin
Assignments
| Pin |
Signal |
I/O |
Definition |
| 1 |
DCD |
I |
Data carrier detect |
| 2 |
RXDA |
I |
Receive data |
| 3 |
TXDA |
O |
Transmit data |
| 4 |
DTR |
O |
Data terminal ready |
| 5 |
GND |
N/A |
Signal ground |
| 6 |
DSR |
I |
Data set ready |
| 7 |
RTS |
O |
Request to send |
| 8 |
CTS |
I |
Clear to send |
| 9 |
RI |
I |
Ring indicator |
| Shell |
N/A |
N/A |
Frame ground |
Use the 25-hole parallel connector
(see Figure 5) to attach a parallel device to the computer. The parallel connector
is used primarily for printers. The parallel port sends and receives data in
parallel format, where 8 data bits (one byte) are sent simultaneously over eight
separate lines.
The parallel port can also be configured
for compatibility with the Personal System/2 (PS/2) standard. Support for the
Enhanced Parallel Port (EPP) feature improves network adapter performance (adapters
connect to the computer's parallel port 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 serial connector.
Figure 5. Pin Assignments for the
Parallel Connector
Table 3. Parallel Connector Pin Assignments
| Pin
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Signal |
I/O |
Definition |
| 1 |
STB# |
I/O |
Strobe |
| 2 |
PD0 |
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 |
Signal
ground |
| Shell |
N/A |
N/A |
Frame
ground |
Use the 15-pin monitor connector
(see Figure 6) to attach an external monitor to the replicator. If the image
does not appear on the monitor immediately, press <Fn><F8>.
Figure 6. Pin Assignments for the
Monitor Connector
Table 4. Monitor Connector Pin Assignments
| Pin |
Signal |
I/O |
Definition |
| 1 |
RED |
O |
Red video |
| 2 |
GREEN |
O |
Green video |
| 3 |
BLUE |
O |
Blue video |
| 4 |
DDC_2 MONID2 |
I |
Monitor detect
ID2 |
| 5 |
GND |
N/A |
Signal ground |
| 6 |
GND |
N/A |
Signal ground |
| 7 |
GND |
N/A |
Signal ground |
| 8 |
GND |
N/A |
Signal ground |
| 9 |
CRTVCC |
0 |
5-V power source
for monitor |
| 10 |
GND |
N/A |
Signal ground |
| 11 |
M_SEN# |
I |
Digital monitor
sense/Monitor detect ID1 |
| 12 |
DDC_DATA |
I |
Monitor detect
serial data |
| 13 |
HSYNC |
O |
Horizontal synchronization |
| 14 |
VSYNC |
O |
Vertical synchronization |
| 15 |
DDC_CLK |
I |
Monitor detect
serial clock |
| Shell |
N/A |
N/A |
Frame ground |
PS/2
Connector
Use the 6-hole, miniature Deutsche
Industrie Norm (DIN) PS/2 connector (see Figure 7) to attach PS/2-compatible
devices such as a mouse, keyboard, or external numeric keypad. If you reconfigure
your hardware, you may need pin number and signal information for the PS/2 connector.
Figure 7. Pin Assignments for the
PS/2 Connector
Table 5. PS/2 Connector Pin Assignments
| Pin |
Signal |
I/O |
Definition |
| 1 |
EXK_MSDATA |
I/O |
External keyboard/keypad/mouse
data |
| 2 |
KBD_DATA |
I |
Keyboard data |
| 3 |
GND |
N/A |
Signal ground |
| 4 |
EXK_MSPWR |
N/A |
External keyboard/keypad/mouse
supply voltage |
| 5 |
EXK_MSCLK |
I/O |
External keyboard/keypad/mouse
clock |
| 6 |
KBD_CLK |
I |
Keyboard Clock |
| Shell |
N/A |
N/A |
Chassis ground |
TV-Out S-Video
Connector
If the television has an S-video
cable, plug it directly into the system at the TV-out S-video connector. If
the television has a composite cable, perform the following steps:
- Connect the cable that came with
your system to the TV-out S-video connector.
- Connect the other end of the cable
to the television's composite cable.
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