SMSC LAN9311 User Manual
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i
335
Revision 1.4 (08-19-08)
DATASHEET
14.5.2.12
Port x MAC Receive CRC Error Count Register (MAC_RX_CRCERR_CNT_x)
This register provides a counter of received packets that with CRC errors. The counter is cleared upon
being read.
being read.
Register #:
Port0: 0419h
Size:
32 bits
Port1: 0819h
Port2: 0C19h
Port2: 0C19h
BITS
DESCRIPTION
TYPE
DEFAULT
31:0
RX CRC
Count of packets that have between 64 and the maximum allowable number
of bytes and have a bad FCS, but do not have an extra nibble. The max
number of bytes is 1518 for untagged packets and 1522 for tagged packets.
If Jumbo2K (bit 3) is set in the
Count of packets that have between 64 and the maximum allowable number
of bytes and have a bad FCS, but do not have an extra nibble. The max
number of bytes is 1518 for untagged packets and 1522 for tagged packets.
If Jumbo2K (bit 3) is set in the
, the max number of bytes is 2048.
Note:
This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100Mbps is approximately 137 hours.
Minimum rollover time at 100Mbps is approximately 137 hours.
RC
00000000h