LAN9312 Datasheet, PDF (325/458 Pages) SMSC Corporation – High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
14.5.2.3 Port x MAC Receive Undersize Count Register (MAC_RX_UNDSZE_CNT_x)
Register #:
Port0: 0410h
Port1: 0810h
Port2: 0C10h
Size:
32 bits
This register provides a counter of undersized packets received by the port. The counter is cleared
upon being read.
BITS
DESCRIPTION
31:0 RX Undersize
Count of packets that have less than 64 byte and a valid FCS.
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100Mbps is approximately 115 hours.
TYPE
RC
DEFAULT
00000000h
SMSC LAN9312
325
DATASHEET
Revision 1.2 (04-08-08)