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IXF1104 4-Port Gigabit Ethernet Media Access Controller
175 Datasheet
Document Number: 278757
Revision Number: 009
Revision Date: 27-Oct-2005
RxPkts65to127
Octets
The total number of packets received (including
bad packets) that were 65-127 octets in length.
Incremented for tagged packets with a length of
65-127 bytes, including tag field.
Port_Index
+ 0x26
R 0x00000000
RxPkts128t0255
Octets
The total number of packets received (including
bad packets) that were 128-255 octets in length.
Incremented for tagged packets with a length of
128-255 bytes, including tag field.
Port_Index
+ 0x27
R 0x00000000
RxPkts256to511
Octets
The total number of packets received (including
bad packets) that were 256-511 octets in length.
Incremented for tagged packets with a length of
256-511 bytes, including tag field.
Port_Index
+ 0x28
R 0x00000000
RxPkts512to1023O
ctets
The total number of packets received (including
bad packets) that were 512-1023 octets in
length. Incremented for tagged packets with a
length of 512-1023 bytes, including tag field.
Port_Index
+ 0x29
R 0x00000000
RxPkts1024to1518
Octets
The total number of packets received (including
bad packets) that were 1024-1518 octets in
length. Incremented for tagged packet with a
length between 1024-1522, including the tag.
Port_Index
+ 0x2A
R 0x00000000
RxPkts1519toMaxO
ctets
The total number of packets received (including
bad packets) that were greater than 1518 octets
in length. Incremented for tagged packet with a
length between 1523-max frame size, including
the tag.
Port_Index
+ 0x2B
R 0x00000000
RxFCSErrors
Number of frames received with legal size, but
with wrong CRC field (also called Frame Check
Sequence (FCS) field).
NOTE: Legal size is 64 bytes through the value
programmed in the “Max Frame Size
(Addr: Port_Index + 0x0F)” on
page 166.
Port_Index
+ 0x2C
R 0x00000000
RxTagged
Number of OK frames with VLAN tag.
(Type field = 0x8100)
Port_Index
+ 0x2D
R 0x00000000
RxDataError
3
Number of frames received with legal length,
containing a code violation (signaled with
RX_ERR on RGMII).
Port_Index
+ 0x2E
R 0x00000000
Table 93. MAC RX Statistics ($ Port_Index + 0x20 – + 0x39) (Sheet 2 of 4)
Name Description Address Type
1
Default
1. RO = Read Only, No clear on Read; R = Read, Clear on Read; W = Write only; R/W = Read/Write, No clear;
R/W/C = Read/Write, Clear on Write
2. When sending in large frames, the counters can only handle certain limits. The behavior of the LongErrors
and VeryLongErrors counters is as follows: VeryLongErrors counts frames that are 2*maxframesize,
dependent upon where maxframesize is set. If maxframesize sets greater than half of the available count in
RxOctetsBad (2^14-1), VeryLongErrors is never incremented, but LongErrors is incremented. This is due to
a limitation in the counter size, which means that an accurate count will not occur in the RxOctetsBAD
counter if the frame is larger than 2^14-1.
3. This register is relevant only when configured for copper operation.
4. This register is relevant only when configured for fiber operation (line side interface is SerDes).