
DescriptionR/WNameBit(s)
Remote fault condition:
• RF1=0 / RF2=0: No error, link is valid (reset
condition).
• RF1=0 / RF2=1: Offline.
• RF1=1 / RF2=0: Failure condition.
• RF1=1 / RF2=1: Auto-negotiation error.
RW/RO(1) (2)
RF112
RF213
Acknowledge. A value of 1 indicates that the device
has received three consecutive matching ability
values from its link partner.
ROACK14
Next page. In dev_ability register, this bit is
always set to 0.
RW/RO(1) (2)NP15
Notes to Table 6-15 :
1. All bits in the dev_ability register have RW access.
2. All bits in the partner_ability register are read-only.
SGMII MAC Mode Auto Negotiation
When the SGMII mode and the SGMII MAC mode auto-negotiation are enabled, the Triple-Speed Ethernet
IP core ignores the value in the dev_ability register and automatically sets the value to 16’h4001 as specified
in the SGMII specification for SGMII auto-negotiation.
When the auto-negotiation is complete, the Triple-Speed Ethernet IP core speed and the duplex mode will
be resolved based on the value in the partner_ability register. The partner_ability register is received
from the link partner during the auto-negotiation process.
Table 6-16: Partner_Ability Register Bits Description in SGMII MAC Mode
DescriptionR/WNameBit(s)
——Reserved9:0
Link partner interface speed:
• 00: copper interface speed is 10 Mbps
• 01: copper interface speed is 100 Mbps
• 10: copper interface speed is 1 gigabit
• 11: reserved
ROCOPPER_SPEED[1:0]11:10
Link partner duplex capability:
• 1: copper interface is capable of operating in full-
duplex mode
• 0: copper interface is capable of operating in half-
duplex mode
ROCOPPER_DUPLEX_STATUS12
——Reserved13
Configuration Register Space
Altera Corporation
Send Feedback
UG-01008
SGMII MAC Mode Auto Negotiation
6-24
2014.06.30
Kommentare zu diesen Handbüchern