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AR# 17615

LogiCORE Ethernet 1000BASE-X PCS/PMA v3.0 - Problems with Auto-Negotiation when using the TBI interface

Description

Keywords: COREGen, Gigabit, ethernet, MAC, TBI, auto, negotiation, 1000BASE-X, PCS, PMA, synchronization, FIP4, FIP_4

Urgency: Standard

General Description:
The Rx Elastic Buffer in the 1000BASE-X PCS v3.0 core with the TBI interface has a weakness that results in unreliable operation of Auto-Negotiation. This problem is caused by differences in clock frequencies between the core and the device to which it is connected. This does not affect the 1000BASE-X PCS/PMA core that uses Rocket I/O for the PHY.

Solution

The Rx Elastic Buffer has been fixed to prevent such a problem. To obtain this fix, apply the patch found in the Release Notes for the 1000BASE-X PCS/PMA v3.0 core in (Xilinx Answer 17335).
AR# 17615
Date Created 07/14/2003
Last Updated 08/31/2006
Status Archive
Type General Article