Dual SerDes Advantages
ENT-AN0090 VPPD-01366 VSC8558/VSC8658/VSC8664 Application Note Revision 1.01
Contents
1 Revision History ............................................................................................................................. 1
1.1 Revision 1.01 ...................................................................................................................................... 1
1.2 Revision 1.00 ...................................................................................................................................... 1
2 Introduction ................................................................................................................................... 2
2.1 Audience ............................................................................................................................................. 2
2.2 References .......................................................................................................................................... 2
2.2.1 Vitesse Documents .................................................................................................................................. 2
2.2.2 External Documents ................................................................................................................................ 2
3 Overview ........................................................................................................................................ 3
3.1 The Need for SerDes Blocks in Gigabit Ethernet ................................................................................ 3
3.2 Supporting 1000BASE-X with SGMII-Based PHYs ............................................................................... 3
3.2.1 Pass-Through Mode with no SerDes ....................................................................................................... 3
3.2.2 SGMII-to-1000BASE-X Using One SerDes ................................................................................................ 4
3.2.3 SGMII-to-1000BASE-X Using Two SerDes ................................................................................................ 4