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15
1.5 LAN
One LAN port in this interface enables 1000BASE-T implementations using an
integrated PHY and transformer in CPU board, and therefore one RJ45 connector
without transformer can complete the Ethernet application. In addition, linking and
active LED functions can indicate LAN port status for front panel in system.
1.5.1 Signal Descriptions
DIP
Pin
Name
Pin Type
Pwr Rail
Description
51
LAN LINK100
LED-
Define by LAN
Chip
3.3V
100Mb/s LED
53
LAN ACT LED+
Define by LAN
Chip
3.3V
LAN Active LED
55
LAN BI_DA+
I/O
DATA A+
57
LAN BI_DB+
I/O
DATA B+
59
LAN BI_DC+
I/O
DATA C+
61
LAN BI_DD+
I/O
DATA D+
63
LAN Chassis
GND
GND
GND
GND
52
LAN LINK1000
LED-
Define by LAN
Chip
3.3V
1000Mb/s LED
54
LAN ACT LED-
Define by LAN
Chip
3.3V
LAN Active LED
56
LAN BI_DA-
I/O
DATA A-
58
LAN BI_DB-
I/O
DATA B-
60
LAN BI_DC-
I/O
DATA C-
62
LAN BI_DD-
I/O
DATA D-
64
LAN Chassis
GND
GND
GND
GND
Table 1.5.1-1 Signal Description for COM
1.5.2 Schematic Guidelines
For Ethernet application, RJ45 connector is the only component. Additionally, all
differential pairs routing with differential impedance 100 ohm for signals BI_DA+/-,
BI_DB+/-, BI_DC+/- and BI_DD+/- in I/O board PCB connect with DIP 64-Pin and RJ45
connectors directly.