Ethernet 1000BASE-X PCS/PMA or SGMII v9.1
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UG155 March 24, 2008
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Chapter 2
Core Architecture
This chapter describes the architecture of the Ethernet 1000BASE-X PCS/PMA or SGMII
core, including all interfaces and major functional blocks.
System Overview
Ethernet 1000BASE-X PCS/PMA or SGMII Using A RocketIO Transceiver
The Ethernet 1000BASE-X PCS/PMA or SGMII core provides the functionality to
implement the 1000BASE-X PCS and PMA sub-layers or used to provide a GMII to SGMII
bridge when used with a RocketIO transceiver. RocketIO transceivers are defined in the
following way:
•
For Virtex-II Pro and Virtex-4 devices, RocketIO Multi-Gigabit Transceivers (MGT)
•
For Virtex-5 LXT and SXT FPGAs, RocketIO GTP transceivers; Virtex-5 FXT FPGA,
RocketIO GTX transceiver
The core interfaces to a RocketIO transceiver, providing some of the PCS layer
functionality such as 8B/10B encoding/decoding, the PMA SERDES, and clock recovery.
Figure 2-1
illustrates the remaining PCS sublayer functionality, and also shows the major
functional blocks of the core.
