Altera Cyclone V Device Handbook page 394

4-12
Gigabit Ethernet
Figure 4-12: 1000BASE-X PHY in a GbE OSI Reference Model
The transceivers, when configured in GbE functional mode, have built-in circuitry to support the following
PCS and PMA functions, as defined in the IEEE 802.3 specification:
• 8B/10B encoding and decoding
• Synchronization
• Upstream transmitter and local receiver clock frequency compensation (rate matching)
• Clock recovery from the encoded data forwarded by the receiver PMD
• Serialization and deserialization
Note: The transceivers do not have built-in support for other PCS functions, such as the autonegotiation
state machine, collision-detect, and carrier-sense functions. If you require these functions, implement
them in the FPGA fabric or in external circuits.
Altera Corporation
LAN
CSMA/CD Layers
Higher Layers
OSI Reference
Model Layers
Application MAC (Optional)
Presentation
Session Reconciliation
Transport
GMII
Network
Data Link
Physical
LLC
MAC
PCS
PMA
1000 Base-X PHY
PMD
Transceiver Protocol Configurations in Cyclone V Devices
CV-53004
2013.10.17
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