SMSC LAN9311 User Manual
Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i
357
Revision 1.4 (08-19-08)
DATASHEET
14.5.2.34
Port x MAC Transmit Undersize Count Register (MAC_TX_UNDSZE_CNT_x)
This register provides a counter of undersized packets transmitted by the port. The counter is cleared
upon being read.
upon being read.
Register #:
Port0: 045Ah
Size:
32 bits
Port1: 085Ah
Port2: 0C5Ah
Port2: 0C5Ah
BITS
DESCRIPTION
TYPE
DEFAULT
31:0
TX Undersize
Count of packets that have less than 64 bytes.
Count of packets that have less than 64 bytes.
Note:
This condition could occur when TX padding is disabled and a tag
is removed.
is removed.
Note:
This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100Mbps is approximately 458 hours.
Minimum rollover time at 100Mbps is approximately 458 hours.
RC
00000000h