101019
OPERATIONS MANUAL PPM-LX800-G
9
An Intel 82551ER 32-bit PCI Ethernet controller chip is used for high-speed data
transfer. It has auto-negotiation capability for speed, duplex and flow control. It
supports IEEE 802.3 10Base-T and 100Base-T in either full- or half-duplex mode at
both 10 and 100 Mbps. In full-duplex mode, it adheres to the IEEE 802.x Flow Control
Specification.
The Ethernet interface is provided at Multi-I/O connector
J11
, which is an 80-pin
high density connector. WinSystems offers the cable
the connection. The pinout for the connector and cable is listed in detail in the
cable
drawing
.
There are three light emitting diodes (LEDs) on the PPM-LX800-G to provide a visual
indication of the link status, network activity and network speed. The yellow Link
Integrity LED is lit when a valid connection is detected. The green Activity LED blinks on
and off when activity is detected on the wire. The red LED is on if a 100Base-T link is
detected and off if a 10Base-T link is detected.
Ethernet activity signals are also provided at connector
J11
to allow optional status
LEDs to be mounted off-board. The Ethernet activity signals are active low and require
an external resistor to limit current to 12-16 mA.
Ethernet Controller
D12
LED 0
(YELLOW)
LINK INTEGRITY
D13
LED1
(GREEN)
ACTIVITY
D11
LED2
(RED)
SPEED
D15
LED3
(GREEN)
STATUS
NOTE:
WinSystems cannot provide technical support for direct programming of the
82551ER controller. We suggest utilizing a TCP/IP stack or Network OS that allows the use
of preexisting 82551ER drivers.
J11
Status LED
A red status LED is populated on the board at
D15
which can be used for any
application specific purpose. The LED can be turned on in software by writing a
1
to
I/O port 1EDH. The LED can be turned off by writing a
0
to 1EDH.