High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

14.5.2.39Port x MAC Transmit Excessive Collision Count Register (MAC_TX_EXCCOL_CNT_x)

Register #:

Port0: 0460h

Size:

32 bits

 

Port1:

0860h

 

 

 

Port2:

0C60h

 

 

This register provides a counter of transmitted packets which experienced 16 collisions. The counter is cleared upon being read.

BITS

DESCRIPTION

TYPE

DEFAULT

 

 

 

 

31:0

TX Excessive Collision

RC

00000000h

 

Count of transmitted packets that experienced 16 collisions. This counter is

 

 

 

incremented only in half-duplex operation.

 

 

 

Note: This counter will stop at its maximum value of FFFF_FFFFh.

 

 

 

Minimum rollover time at 100Mbps is approximately 1466 hours.

 

 

 

 

 

 

Revision 1.4 (08-19-08)

360

SMSC LAN9312

 

DATASHEET