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12
LAN17255HRHR User’s Manual
CNxx Pin
Function
10/100 Function
1
Link at 10 Mbps
Low when linked at 10 Mbps, blink for activity
2
Link at 100 Mbps
Low when linked at 100 Mbps, blink for activity
3
Link at 1000 Mbps
Low when linked at 1000 Mbps, blink for activity
4
3.3 volts or ground
Depends on JP1 setting
If JP1 1-2 is shorted these pins will be ground
If JP1 2-3 is shorted these pins will be 3.3 volts
Table 7: CN14 External LED Drive
3.3.6
CN17
P
OWER
C
ONNECTOR
CN17 is a power connector for standalone operation. The LAN17255HR operates on +5 volts. The pin out of the connector is shown in the
table below.
CN17 Pin
Signal
Description
1
GND
Ground
2
+5V
Power
3
RSVD
Reserved
4
RSVD
Reserved
5
RSVD
Reserved
6
RSVD
Reserved
7
GND
Ground
8
+5V
Power
9
GND
Ground
10
RSVD
Reserved
11
RSVD
Reserved
12
RSVD
Reserved
Table 8: CN17 Power Connector
Facing the connector, the pin assignments are as follows:
11
9
7
2
3
1
RSVD
GND
GND
RSVD
RSVD
GND
RSVD
RSVD
+5V
RSVD
RSVD
+5V
12
10
8
6
4
2
3.3.7
CN1
&
CN2:
PC/104
ISA
B
US
C
ONNECTOR
The ISA bus connector is the connection to the system CPU. This connector is used only as a +5V and ground source. The position and pin
assignments are compliant with the
PC/104 Specification
. (See PC/104 Specifications on page 19).
3.3.8
CN3:
PCI-104
PCI
B
US
C
ONNECTOR
The PCI connector is the connection to PCI peripheral modules. This connector is used only as a +5V and ground source. The position and
pin assignments are compliant with the
PC/104-
Plus
Specification
. (See PC/104 Specifications on page 19).