HC4GX15 Datasheet, PDF (426/668 Pages) Altera Corporation – HardCopy IV Device Handbook

1–162
Chapter 1: HardCopy IV GX Transceiver Architecture
Functional Modes
Figure 1–130 shows the 1000 Base-X PHY position in a Gigabit Ethernet OSI reference
model.
Figure 1–130. 1000 Base-X PHY in a Gigabit Ethernet OSI Reference Model
OSI
Reference
Model Layers
Application
Presentation
Session
Transport
Network
Data Link
Physical
GMII
LAN
CSMA/CD Layers
Higher Layers
LLC
MAC (Optional)
MAC
Reconciliation
PCS
PMA
PMD
1000 Base-X
PHY
Medium
HardCopy IV GX transceivers, when configured in GIGE functional mode, have
built-in circuitry to support the following PCS and PMA functions 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
1 HardCopy IV GX transceivers do not have built-in support for other PCS functions;
for example, auto-negotiation state machine, collision-detect, and carrier-sense. If
required, you must implement these functions in a PLD logic array or external
circuits.
HardCopy IV Device Handbook Volume 3
© June 2009 Altera Corporation