SMSC LAN9312 - Manual (Page 331)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312 331 Revision 1.4 (08-19-08)
DATASHEET
14.5.2.10 Port x MAC Receive Oversize Count Register (MAC_RX_OVRSZE_CNT_x)
This register provides a counter of received packets with a size greater than the maximum byte size.
The counter is cleared upon being read.
Note: For this counter, a packet with the maximum number of bytes that is not an integral number of
bytes (e.g. a 1518 1/2 byte packet) is not considered oversize.
Register #: Port0: 0417h Size: 32 bits
Port1: 0817h
Port2: 0C17h
BITS DESCRIPTION TYPE DEFAULT
31:0 RX Oversize
Count of packets that have more than the maximum allowable number of
bytes and a valid FCS. The max number of bytes is 1518 for untagged
packets and 1522 for tagged packets. If Jumbo2K (bit 3) is set in the
Port x
MAC Receive Configuration Register (MAC_RX_CFG_x) , the max number
of bytes is 2048.
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100Mbps is approximately 8813 hours.
RC 00000000h