1 sm management port, 2 dual gigabit ethernet controller, 3 usb front connector – Kontron AT8940 User Manual
Page 35: Sm management port, Dual gigabit ethernet controller, Usb front connector, Table 2-5 sm management port led
Board Features
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2.5.1
SM Management Port
The SM Management 10/100/1000Base-T Ethernet Port is located on the AT8940 faceplate.
Table 2-5:SM Management Port LED
2.5.2
Dual Gigabit Ethernet Controller
The Intel 82580 Dual Gigabit Ethernet Controller connects to the 4 lane PCIe Interface of the Type 1
connector. The 82580 supports PCI Express Gen 1 (2.5 Gbps) or Gen 2 (5.0 Gbps).
Ethernet Port 0 operates in SerDes 1000Base-KX mode and connects to the AT8940 Base Interface.
Ethernet Port 1 operates in SerDes 1000Base-KX mode and connects to redundant ATCA hub blade Base
Interface via the Update Channel of Zone 2.
The System FPGA holds the 82580 in device off state when no COMExpress module is present.
The System FPGA holds the 82580 in reset until the COMExpress module release the peripheral devices.
2.5.3
USB Front Connector
The USB front interface is a Type A receptacle according USB 2.0. It connects to the COM Express ETX Module
USB channel 2.
The USB Front Interface is filtered, overcurrent and fuse protected.
LED
Function/Displays
L1
Link/Activity: Green LED
•
Off
link down
•
On
link up but no activity
•
Blinking
link up and activity
L2
Speed: Green/Amber LED
•
Off
10Base-T
•
On (amber)
100Base-Tx
•
On (Green)
1000Base-T
Signal Path:
USB Front Connector is located on J8.