SMSC LAN9312 - Manual (Page 406)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08) 406 SMSC LAN9312
DATASHEET
14.5.3.37 Switch Engine Port 1 Learn Discard Count Register (SWE_LRN_DISCRD_CNT_1)
This register counts the number of MAC addresses on Port 1 that were not learned or were overwritten
by a different address due to address table space limitations.
Register #: 1859h 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