Altera Triple Speed Ethernet MegaCore Function Bedienungsanleitung Seite 67

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Seitenansicht 66
Figure 4-17: SGMII Auto-Negotiation in MAC Mode and PHY Mode
SGMII PCS
(MAC Mode)
SGMII Link
Medium
Twisted
Copper
Pair
Device Ability
Link Partner Ability
Altera Device
Triple Speed Ethernet
MegaCore Function
SGMII PCS with PMA
(PHY Mode)
Device Ability
Link Partner Ability
Altera Device
Triple Speed Ethernet
MegaCore Function
Device Ability
10/100/1000BASE-T PHY 10/100/1000BASE-T PHY
Link Partner
Link Partner Ability
Device Ability
Link Partner Ability
If the SGMII_ENA and USE_SGMII_AN bits in the if_mode register are 1, the PCS function is automatically
configured with the capabilities advertised by the PHY device once the auto-negotiation completes.
If the SGMII_ENA bit is 1 and the USE_SGMII_AN bit is 0, the PCS function can be configured with the
SGMII_SPEED and SGMII_DUPLEX bits in the if_mode register.
If the SGMII_ENA bit is 1 and the SGMII_AN_MODE bit is 1 (SGMII PHY Mode auto-negotiation is enabled)
the speed and duplex mode resolution will be resolved based on the value that you set in the dev_ability
register once auto negotiation is done. You should use set to the PHY mode if you want to advertise the link
speed and duplex mode to the link partner.
Altera Corporation
Functional Description
Send Feedback
4-31
SGMII Auto-Negotiation
UG-01008
2014.06.30
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