SMSC LAN9312 - Manual (Page 334)

High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
Revision 1.4 (08-19-08) 334 SMSC LAN9312
DATASHEET
14.5.2.13 Port x MAC Receive Multicast Count Register (MAC_RX_MULCST_CNT_x)
This register provides a counter of valid received packets with a multicast destination address. The
counter is cleared upon being read.
Note: A bad packet is one that has a FCS or Symbol error.
Register #: Port0: 041Ah Size: 32 bits
Port1: 081Ah
Port2: 0C1Ah
BITS DESCRIPTION TYPE DEFAULT
31:0 RX Multicast
Count of good packets (proper length and free of errors), including MAC
control frames, that have a multicast destination address (not including
broadcasts).
Note: This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100Mbps is approximately 481 hours.
RC 00000000h