Date printed: 7/30/2019 USXGMII- Copper PHY: EDCS- 1150953
Copyright 2014 Cisco Systems 3 Cisco Confidential – Controlled Access
A printed copy of this document is considered uncontrolled. Refer to the online version for the controlled revision.
Table of Contents
1 Overview .................................................................................................................................. 6
1.1 In-band Control and Status Signaling ................................................................................ 9
1.1.1 Auto-neg Mechanism .................................................................................................. 9
1.1.2 Auto-negotiation Message ........................................................................................ 10
1.1.3 Packet Control Header .............................................................................................. 13
2 Implementation Specification ................................................................................................ 15
2.1 XGMII Mapping .............................................................................................................. 15
2.2 GMII Mapping ................................................................................................................. 15
2.3 MII Mapping.................................................................................................................... 15
2.4 Pause Frame Support ....................................................................................................... 15
2.5 Auto-neg Mechanism ...................................................................................................... 15
2.5.1 Transmitting Configuration Words ........................................................................... 16
2.6 Rate Adaptation - Replicating Transmit Bytes ................................................................ 16
2.6.1 Tx 10G Mode ............................................................................................................ 17
2.6.2 10G Mode Sampling Received Bytes ....................................................................... 18
2.6.3 Tx 5G Mode .............................................................................................................. 18
2.6.4 Rx 5G Sampling Received Bytes .............................................................................. 19
2.6.5 Receiving Configuration Words ............................................................................... 19
2.6.6 Clocking .................................................................................................................... 19
2.6.7 Hardware Auto-negotiation Programming Sequence ............................................... 19
2.6.8 Port ASIC Software Controlled Negotiation Programming Sequence ..................... 20
2.7 USXGMII Packet Control Header Implementation ........................................................ 21
2.8 PHY Implementation ....................................................................................................... 26
2.8.1 Rx PHY Block .......................................................................................................... 26
2.8.2 Tx PHY Block........................................................................................................... 27
2.8.3 MDI: Tx IPG and Pre-amble Processing on MDI .................................................... 27
2.9 Electrical Specification .................................................................................................... 29
3 Appendix ................................................................................................................................ 31
