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AR# 39138

LogiCORE IP Tri-Mode Ethernet MAC v4.4rev2 and earlier - LogiCORE IP Tri-Mode Ethernet MAC v4.4rev2 and earlier - 11 byte IFG transmitted when core generated for Full Duplex only

Description

When the Tri-Mode Ethernet MAC Core is generated either for MII, GMII, or Tri-speed operation for full duplex only, in the example design simulation the default minimum transmitted IFG is 11 bytes instead of the required 12 bytes as per the 802.3 IEEE specification.

Solution


This issue does not arise if the core is generated for both full and half duplex support.

To work around this problem, enable the IFG Adjust and set tx_ifg_adjust to 12.

Linked Answer Records

Master Answer Records

AR# 39138
Date Created 11/17/2010
Last Updated 09/08/2014
Status Active
Type General Article
IP
  • Tri-Mode Ethernet MAC