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Ethernet 1000BASE-X PCS/PMA or SGMII v9.1
UG155 March 24, 2008
Chapter 3:
Generating and Customizing the Core
R
Select Standard
Select from the following standards for the core:
•
1000BASE-X
. 1000BASE-X Physical Coding Sublayer (PCS) functionality is designed
to the IEEE 802.3 specification. Depending on the choice of physical interface, the
functionality may be extended to include the 1000BASE-X Physical Medium
Attachment (PMA) sublayer. Default setting.
•
SGMII
. Provides the functionality to provide a Gigabit Media Independent Interface
(GMII) to Serial-GMII (SGMII) bridge, as defined in the Serial-GMII Specification
(Cisco Systems, ENG-46158). SGMII may be used to replace GMII at a much lower pin
count and for this reason often favored by PCB designers.
•
Both
(a combination of 1000BASE-X and SGMII). Combining the 1000BASE-X and
SGMII standards lets you dynamically configure the core to switch between
1000BASE-X and SGMII standards. The core can be switched by writing through the
MDIO Management Interface. For more information, see
Chapter 9, “Configuration
and Status.”
Core Functionality
Figure 3-2
displays the Ethernet 1000BASE-X PCS/PMA or SGMII functionality screen.
Figure 3-2:
1000BASE-X Standard Options Screen
