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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
Name
Pin
LAN LINK100
51
LED-
53
LAN ACT LED+
55
LAN BI_DA+
57
LAN BI_DB+
59
LAN BI_DC+
61
LAN BI_DD+
LAN Chassis
63
GND
LAN LINK1000
52
LED-
54
LAN ACT LED-
56
LAN BI_DA-
58
LAN BI_DB-
60
LAN BI_DC-
62
LAN BI_DD-
LAN Chassis
64
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.
Pin Type
Define by LAN
Chip
Define by LAN
Chip
I/O
I/O
I/O
I/O
GND
Define by LAN
Chip
Define by LAN
Chip
I/O
I/O
I/O
I/O
GND
15
Pwr Rail
Description
3.3V
100Mb/s LED
3.3V
LAN Active LED
DATA A+
DATA B+
DATA C+
DATA D+
GND
GND
3.3V
1000Mb/s LED
3.3V
LAN Active LED
DATA A-
DATA B-
DATA C-
DATA D-
GND
GND
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