LAN9312-NZW Standard Microsystems (SMSC), LAN9312-NZW Datasheet - Page 338

• Manufacturer Part Number: LAN9312-NZW
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN9312-NZW

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Revision 1.7 (06-29-10)
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
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
DATASHEET
(MAC_RX_CFG_x), the max number
338
Size:
32 bits
Port x
TYPE
RC
SMSC LAN9312
00000000h
DEFAULT
Datasheet