XGMII : (Copy from Wikipedia)
two 32-bits datapaths (Rx & Tx)
two 4-bits control flows (Rxc & Txc)
operating at 156.25 MHz DDR (312.5 MT/s).
XAUI:
XAUI has the following characteristics:
- Simple signal mapping to the XGMII
- Independent transmit and receive data paths
- Four lanes conveying the XGMII 32-bit data and control
- Differential signaling with low voltage swing (1600 mV(p-p))
- Self-timed interface allows jitter control to the PCS
- Shared technology with other 10 Gbit/s interfaces
- Shared functionality with other 10 Gbit/s Ethernet blocks
- Utilization of 8b/10b encoding
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