Device Bus; Smbus; Gigabit Ethernet; Table 4-1 Gigabit Ethernet On-Board Indicator Leds - GE C2K Hardware Reference Manual

4.5 Device Bus

The C2K provides a 32-bit 133MHz asynchronous Device Bus mastered by the MV64460 System
Controller. The Device Bus services the following devices:
• FPGA
• Flash memory

4.6 SMBus

The MV64460 System Controller includes a SMBus Host Controller to master an on-board serial
interface. The SMBus hosts the following slave devices:
• Temperature Sensor
• Board Configuration EEPROM
• User Configuration EEPROM
• RTC

4.7 Gigabit Ethernet

The C2K provides three 10/100/1000Base-T Ethernet ports to the backplane: ETH0 and ETH1 to
cPCI_J3 and ETH2 to cPCI_J4. The MV64460 System Controller provides three Ethernet Media
Access Controllers (MACs). The VSC8244 PHY provides the physical interfaces.
The C2K provides nine on-board LEDs to monitor link activity and data transfer speeds for the
three Ethernet ports as described in Table 4-1.
Gigabit Ethernet on-board indicator LEDs.
Table 4-1
LED Description
D1 ETH0 Link/Activity
D2 ETH0 10/100T Link speed
D3 ETH0 1000T Link speed
D4 ETH1 Link/Activity
D5 ETH1 10/100T Link speed
D6 ETH1 1000T Link speed
D7 ETH2 Link/Activity
D8 ETH2 10/100T Link speed
D9 ETH2 1000T Link speed
C2K User's Guide
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LED Indication
Link/Activity:
Indicates a valid link has
been establish, blinking indi-
cates data transfer activity.
10/100T Link speed:
Indicates data transfers
rates of 10Mb/s or 100Mb/s.
1000T Link speed: Indicates data transfers of
1000Mb/s.
Functional Blocks
4-4