High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

14.5.2.4Port x MAC Receive 64 Byte Count Register (MAC_RX_64_CNT_x)

Register #:

Port0: 0411h

Size:

32 bits

 

Port1:

0811h

 

 

 

Port2:

0C11h

 

 

This register provides a counter of 64 byte packets received by the port. The counter is cleared upon being read.

BITS

DESCRIPTION

TYPE

DEFAULT

 

 

 

 

31:0

RX 64 Bytes

RC

00000000h

 

Count of packets (including bad packets) that have exactly 64 bytes.

 

 

 

Note: This counter will stop at its maximum value of FFFF_FFFFh.

 

 

 

Minimum rollover time at 100Mbps is approximately 481 hours.

 

 

 

 

 

 

Note: A bad packet is defined as a packet that has an FCS or Symbol error. For this counter, a packet that is not an integral number of bytes is rounded down to the nearest byte.

SMSC LAN9312

325

Revision 1.4 (08-19-08)

 

DATASHEET