
170 SPARC Enterprise T5440 Server Service Manual • July 2009
USB Connector Pinouts
Two Universal Serial Bus (USB) ports are located on the motherboard in a
double-stacked layout and can be accessed from the back panel. Two additional USB
ports are located on the front panel.
FIGURE: USB Connector Diagram
Gigabit Ethernet Connector Pinouts
Four RJ-45 Gigabit Ethernet connectors (NET0, NET1, NET2, NET3) are located on
the system motherboard and can be accessed from the back panel. The Ethernet
interfaces operate at 10 Mbit/sec, 100 Mbit/sec, and 1000 Mbit/sec.
TABLE: USB Connector Signals
Pin Signal Description Pin Signal Description
A1 +5 V (fused) B1 +5 V (fused)
A2 USB0/1- B2 USB2/3-
A3 USB0/1+ B3 USB2/3+
A4 Ground B4 Ground
1
2
3
4
1
2
3
4
A
B
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