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AR# 56267

LogiCORE IP Tri-Mode Ethernet MAC - Undersized frames less than 14 bytes cause Example Design TX FIFO pointers misalignment

Description

The Example design TX FIFO has a documented minimum frame size limitation of 14 bytes at input to the transmit FIFO. Undersized frames less than 14 bytes can cause misalignment on the TX FIFO pointers.

Solution

Avoid sending less than the minimum size frames, or use reset when in this state to recover. In v8.0 and later of the core, frames less that 14 bytes will be dropped from the FIFO, but not cause pointer misalignment.

AR# 56267
Date Created 06/06/2013
Last Updated 10/23/2013
Status Active
Type General Article
IP
  • Tri-Mode Ethernet MAC