lan9311 Standard Microsystems Corp., lan9311 Datasheet - Page 341

• Manufacturer Part Number: lan9311
• Description: Lan9311/lan9311i Two Port 10/100 Managed Ethernet Switch With 16-bit Non-pci Cpu Interface
• Manufacturer: Standard Microsystems Corp.

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9311/LAN9311i
14.5.2.17
BITS
31:0
RX Jabber
Count of packets that have more than the maximum allowable number of
bytes and a FCS error. The max number of bytes is 1518 for untagged
packets and 1522 for tagged packets. If Jumbo2K (bit 3) is set in the
MAC Receive Configuration Register
of bytes is 2048.
Note:
Port x MAC Receive Jabber Error Count Register (MAC_RX_JABB_CNT_x)
This register provides a counter of received packets with greater than the maximum allowable number
of bytes and a FCS error. The counter is cleared upon being read.
Note: For this counter, a packet with the maximum number of bytes that is not an integral number of
This counter will stop at its maximum value of FFFF_FFFFh.
Minimum rollover time at 100Mbps is approximately 8813 hours.
bytes (e.g. a 1518 1/2 byte packet) and contains a FCS error is not considered jabber and is
not counted here.
Register #:
Port0: 041Eh
Port1: 081Eh
Port2: 0C1Eh
DESCRIPTION
DATASHEET
(MAC_RX_CFG_x), the max number
341
Size:
32 bits
Port x
TYPE
RC
Revision 1.2 (04-08-08)
00000000h
DEFAULT