SMSC LAN9312 - Manual (Page 405)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312 405 Revision 1.4 (08-19-08)
DATASHEET
14.5.3.36 Switch Engine Port 0 Learn Discard Count Register (SWE_LRN_DISCRD_CNT_MII)
This register counts the number of MAC addresses on Port 0(Host MAC) that were not learned or were
overwritten by a different address due to address table space limitations.
Register #: 1858h Size: 32 bits
BITS DESCRIPTION TYPE DEFAULT
31:0 Learn Discard
This field is a count of MAC addresses not learned or overwritten and is
cleared when read.
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100Mbps is approximately 481 hours.
RC 00000000h