Data Sheet

Ethernet Controller I210 — Programming Interface

488

8.18.6 Single Collision Count - SCC (0x4014; RC)

This register counts the number of times that a successfully transmitted packet encountered a single

collision. This register only increments if transmits are enabled (TCTL.EN is set) and the I210 is in half-

duplex mode.

8.18.7 Excessive Collisions Count - ECOL (0x4018; RC)

When 16 or more collisions have occurred on a packet, this register increments, regardless of the value

of collision threshold. If collision threshold is set below 16, this counter won’t increment. This register

only increments if transmits are enabled (TCTL.EN is set) and the I210 is in half-duplex mode.

8.18.8 Multiple Collision Count - MCC (0x401C; RC)

This register counts the number of times that a transmit encountered more than one collision but less

than 16. This register only increments if transmits are enabled (TCTL.EN is set) and the I210 is in half-

duplex mode.

8.18.9 Late Collisions Count - LATECOL (0x4020; RC)

Late collisions are collisions that occur after one slot time. This register only increments if transmits are

enabled (TCTL.EN is set) and the I210 is in half-duplex mode.

8.18.10 Collision Count - COLC (0x4028; RC)

This register counts the total number of collisions seen by the transmitter. This register only increments

if transmits are enabled (TCTL.EN is set) and the I210 is in half-duplex mode.