Function
Pin Number
GND
1
GND
2
VPWR
3
+5V
4
GPIO 4
5
GPIO 0
6
4.9 JP10,
Reset
2 pins 0.050” header. Shorting the two pins together will hard reset the board.
4.10 JP11, COM2
10 pins 0.050” header for serial port COM2. Can be connected to a DB9 using a de facto standard cable
assembly. When the board is viewed as on the illustration, pin 1 is the top left pin, at the “JP11” text.
DB9 Pin
Function
Pin Number
Function
DB9 Pin
1
DCD
1
2
DSR
6
2
RXD
3
4
RTS
7
3
TXD
5
6
CTS
8
4
DTR
7
8
RIN
9
5
GND
9
10
n-c
4.11 P1, COM1
9 pins DB9 connector for serial port COM1. The pinout follow the de facto standard for DB9 PC serial
ports. Normally used for serial management console.
4.12 D3, Error LED
This red LED is connected to the SC520 processor PIO9, pin AF9. It is connected so that it will be on at
power on, and can then be turned off and on by software control. When programming PIO9 with a 0, it will
be off. The BIOS will normally turn it off just before booting an operating system.
4.13 D6, Network Activity LED
This green LED is a logical OR of the activity LED’s on the ethernet connectors.
4.14 D10, Power On LED
This green LED will be on when there is applied power to the board.
5
Software Installation
The net4501 is designed to be fully PC compatible, but has some limitation due to the design decision to
leave out the video, keyboard, floppy and IDE interfaces.
5.1 CompactFlash
use
The CompactFlash socket is the only medium for permanent program and data storage. There are two ways
of loading software on the CompactFlash card.
•
Booting an install program using the PXE boot ROM, and then installing the rest over the network.
Only some operating systems support PXE booting and/or installation over the network.
•
Preloading the CompactFlash card on another system. As the CompactFlash emulates an IDE device, it
can be connected to a host system using either an IDE-CompactFlash adapter, a PCMCIA to
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