Altera Triple Speed Ethernet MegaCore Function Uživatelský manuál Strana 108

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DescriptionR/WNameBit(s)
Acknowledge. A value of 1 indicates that the link
partner has received 3 consecutive matching ability
values from the device.
ROACK14
Copper link partner status:
1: copper interface link is up
0: copper interface link is down
ROCOPPER_LINK_STATUS15
SGMII PHY Mode Auto Negotiation
When the SGMII mode and the SGMII PHY mode auto-negotiation is enabled, set the dev_ability register
before the auto-negotiation process so that the link partner can identify the copper speed, duplex status, and
link status.
When the auto-negotiation is complete, Triple-Speed Ethernet IP core speed and the duplex mode will be
resolved based on the value that you set in the dev_ability register. You can get the value for the
dev_ability register from the system level where the Triple-Speed Ethernet IP core is integrated. If the IP
core is integrated in the system level with another IP that resolves the copper speed and duplex information,
use these values to set the dev_ability register.
Table 6-17: Dev_Ability Register Bits Description in SGMII PHY Mode
DescriptionR/WNameBit(s)
Always set bit 0 to 1 and bits19 to 0.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
RWSPEED[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
1 Gbps speed does not support half-duplex
mode.
RWCOPPER_DUPLEX_STATUS12
Always set this bit to 0.Reserved13
Acknowledge. Value as specified in the IEEE 802.3z
standard.
ROACK14
Copper link partner status:
1: copper interface link is up
0: copper interface link is down
RWCOPPER_LINK_STATUS15
Altera Corporation
Configuration Register Space
Send Feedback
6-25
SGMII PHY Mode Auto Negotiation
UG-01008
2014.06.30
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