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

Datasheet

14.5.2.3Port x MAC Receive Undersize Count Register (MAC_RX_UNDSZE_CNT_x)

Register #:

Port0: 0410h

Size:

32 bits

 

Port1:

0810h

 

 

 

Port2:

0C10h

 

 

This register provides a counter of undersized packets received by the port. The counter is cleared upon being read.

BITS

DESCRIPTION

TYPE

DEFAULT

 

 

 

 

31:0

RX Undersize

RC

00000000h

 

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.

 

 

 

 

 

 

Revision 1.4 (08-19-08)

324

SMSC LAN9312

 

DATASHEET