IP1000ALF-DS-R04 datasheet(30/75 Pages) ETC2

30 / 75 page

IP1000A LF

Preliminary Data Sheet

30/75

July 5, 2005

IP1000A LF-DS-R08

3.2

MAC Registers

3.2.1

Ethernet MIB Statistics

The host interacts with the IP1000A LF mainly through slave registers, which occupy 256 bytes in the

host system’s I/O space, 512 bytes in memory space, or both. Generally, registers are referred to as “I/O

registers”, implying that the registers may in fact be mapped and accessed by the host system in

memory space.

These registers must be accessed with instructions that are no larger than the bit-width of the register

being accessed. There are several classes of I/O registers, with Ethernet Management Information Base

(MIB) Statistics comprising a portion of the total I/O register space. The Ethernet MIB Statistic registers

implement several counters defined in the IEEE 802.3 standard.

Table 3-3 : IP1000A LF Ethernet MIB Statistics Register Map

CLK

BYTE 4

BYTE 3

BYTE 2

BYTE 1

ADDR OFFSET

FramesWEXDeferal

FramesAbortXSColls

MacControlFramesXmtd

CarrierSenseErrors

BcstFramesXmtdOk

SingleColFrames

MultiColFrames

LateCollisions

FramesWDeferredXmt

McstFramesXmtdOk

FramesXmtdOk

BcstOctetXmtOk

McstOctetXmtOk

OctetXmtOk

FramesLostRxErrors

FramesCheckSeqErrors

InRangeLengthErrors

FrameTooLongErrors

MacControlFramesRcvd

BcstFramesRcvdOk

McstFramesRcvdOk

FramesRcvdOk

BcstOctetRcvOk

McstOctetRcvdOk

OctetRcvOk

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