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MAC/SGMII Link Setup (CTRL_EXT.LINK_MODE = 10b) — Intel
®
82575EB Gigabit Ethernet
Controller
324632-003 Intel
®
82575EB Gigabit Ethernet Controller
Revision: 2.1 Software Developer’s Manual and EEPROM Guide
January 2011 35
STATUS.FD - Reflects the value written by software to CTRL.FD
STATUS.LU - Reflects whether loss-of-signal (LOS) from SerDes is indicated, qualified with CTRL.SLU
(set to 1b)
STATUS.SPEED - Reflects 1000 Mb/s speed, reporting fixed value of 10b
PCS_LCTL.FORCE_LINK - Must be set to 1b by software to enable communications to the SerDes
PCS_LCTL.FSD - Must be set to 1b by software to enable communications to the SerDes
PCS_LCTL.FSV - Ignored; speed always 1000 Mb/s when using SerDes mode communications.
PCS_LCTL.FDV - Should be set by software to the duplex value established via software priority
resolution
PCS_LCTL.FLV - Should be set by software to 1b when software Auto-Negotiation completes
• Forced-Link (Auto-Negotiation Skipped) (PCS_LCTL. AN ENABLE = 0b, and no software auto-
negotiation performed)
CTRL.FD - Duplex is set by software for the desired duplex mode of operation
CTRL.SLU - Must be set to 1b by software to enable communications to the SerDes
CTRL.RFCE - Set by software for the desired mode of operation
CTRL.TFCE - Set by software for the desired mode of operation
CTRL.SPEED - Ignored
STATUS.FD - Reflects the value written by software to CTRL.FD
STATUS.LU - Reflects whether loss-of-signal (LOS) from SerDes is indicated, qualified with CTRL.SLU
(set to 1b)
STATUS.SPEED - Reflects 1000 Mb/s speed, reporting fixed value of 10b
PCS_LCTL.FORCE_LINK - Must be set to 1b by software to enable communications to the SerDes
PCS_LCTL.FSD - Must be set to 1b by software to enable communications to the SerDes
PCS_LCTL.FSV - Ignored; speed always 1000 Mb/s when using SerDes mode communications.
PCS_LCTL.FDV - Duplex is set by software for the desired duplex mode of operation.
PCS_LCTL.FLV - Should be set by software to 1b to enable communications to the SerDes
3.7.4 MAC/SGMII Link Setup (CTRL_EXT.LINK_MODE
= 10b)
Link setup procedures using an external SGMII interface mode: