SMSC LAN9312 - Manual (Page 349)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312 349 Revision 1.4 (08-19-08)
DATASHEET
14.5.2.28 Port x MAC Transmit 64 Byte Count Register (MAC_TX_64_CNT_x)
This register provides a counter of 64 byte packets transmitted by the port. The counter is cleared
upon being read.
Register #: Port0: 0454h Size: 32 bits
Port1: 0854h
Port2: 0C54h
BITS DESCRIPTION TYPE DEFAULT
31:0 TX 64 Bytes
Count of packets that have exactly 64 bytes.
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100Mbps is approximately 481 hours.
RC 00000000h