Appendix C Functional Description C-5
C.1.3.5 Gigabit Ethernet
â– 10/100/1000BASE-T Ethernet LAN controller
â– Integrated MAC and PHY
TABLE C-1 describes the behavior of the Ethernet status LEDs.
C.2 Motherboard
This section describes more details about the motherboard and some components.
C.2.1 Motherboard Block Diagram
FIGURE C-3 shows the block diagram for the Sun Ultra 45 motherboard.
Note – The Sun Ultra 25 workstation motherboard has one CPU (CPU0) and one
bank of four DIMM slots. Other aspects of the Sun Ultra 25 are the same as the Sun
Ultra 45 workstation.
TABLE C-1 Twisted-Pair Ethernet LED Status
LED Status
Green - Link When illuminated, a link exists.
Amber - Activity When flashing, indicates transmit or receive activity.
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