I'm currently working on a 10GX QuadPHY with 4 x 1.2 to 3.2 Gbit/s Quad, Fully Redundant, XAUI to XGMII, 10 Gigabit Ethernet/Fibre Channel Physical Layer Device.
It's difficult to understand but I'm working my way through it.
Whats XAUI you say?
Pronounced 'zowie', is a standard for connecting 10 Gigabit Ethernet PHY to an Ethernet MAC on a PCB. XAUI = 10X Attachment Unit Interface. XAUI connects the PHY to the backplane of the PCB.
What's XGMII you say?
A 72-pin 10 Gigabit Media Independent Interface. This is a standard for connecting full duplex 10GbE ports to each other and to other electronic devices. Composed of 2 x 32bit datapaths (Rx and Tx) and 2 x 4bits control flows (Rxc and Txc), operating at 156.25MHz. With a multiplier of 20X, 3.125Gbit/s transfers are possible. The XGMII connects the PHY to the FPGA.
PHY = Physical Layer
MAC = Media Access Control Layer
FPGA = Field Programmable Gate Array
PCB = Printed Circuit Board
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