Cirrus Logic EP93xx - Manual (Page 335)

DS785UM1 9-33
Copyright 2007 Cirrus Logic
1/10/100 Mbps Ethernet LAN Controller
EP93xx User’s Guide
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NColl: Number of Collisions. This field contains the number of
collisions that were experienced in transmitting this frame.
TBI: Transmit Buffer Index. The transmit buffer index is a copy
of the transmit buffer index from the first descriptor of a
transmit frame. This is provided as an aid to the Host
software in keeping track of the transmit buffers.