NH82801BA S L7UU Intel, NH82801BA S L7UU Datasheet - Page 299
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NH82801BA S L7UU
Manufacturer Part Number
NH82801BA S L7UU
Description
Manufacturer
Intel
Datasheet
1.NH82801BA_S_L7UU.pdf
(671 pages)
Specifications of NH82801BA S L7UU
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7.2.14
Intel
®
Table 139. Statistical Counters (Sheet 1 of 2)
82801EB ICH5 / 82801ER ICH5R Datasheet
Statistical Counters
(LAN Controller—B1:D8:F0)
The ICH5’s integrated LAN controller provides information for network management statistics by
providing on-chip statistical counters that count a variety of events associated with both transmit
and receive. The counters are updated by the LAN controller when it completes the processing of a
frame (that is, when it has completed transmitting a frame on the link or when it has completed
receiving a frame). The Statistical Counters are reported to the software on demand by issuing the
Dump Statistical Counters command or Dump and Reset Statistical Counters command in the SCB
Command Unit Command (CUC) field.
ID
12
16
20
24
28
32
36
40
44
0
4
8
Transmit Good Frames
Transmit Maximum
Collisions (MAXCOL)
Errors
Transmit Late
Collisions (LATECOL)
Errors
Transmit Underrun
Errors
Transmit Lost Carrier
Sense (CRS)
Transmit Deferred
Transmit Single
Collisions
Transmit Multiple
Collisions
Transmit Total
Collisions
Receive Good Frames
Receive CRC Errors
Receive Alignment
Errors
Counter
This counter contains the number of frames that were transmitted properly
on the link. It is updated only after the actual transmission on the link is
completed, not when the frame was read from memory as is done for the
Transmit Command Block status.
This counter contains the number of frames that were not transmitted
because they encountered the configured maximum number of collisions.
This counter contains the number of frames that were not transmitted
since they encountered a collision later than the configured slot time.
A transmit underrun occurs because the system bus cannot keep up with
the transmission. This counter contains the number of frames that were
either not transmitted or retransmitted due to a transmit DMA underrun. If
the LAN controller is configured to retransmit on underrun, this counter
may be updated multiple times for a single frame.
This counter contains the number of frames that were transmitted by the
LAN controller despite the fact that it detected the de-assertion of CRS
during the transmission.
This counter contains the number of frames that were deferred before
transmission due to activity on the link.
This counter contains the number of transmitted frames that encountered
one collision.
This counter contains the number of transmitted frames that encountered
more than one collision.
This counter contains the total number of collisions that were encountered
while attempting to transmit. This count includes late collisions and frames
that encountered MAXCOL.
This counter contains the number of frames that were received properly
from the link. It is updated only after the actual reception from the link is
completed and all the data bytes are stored in memory.
This counter contains the number of aligned frames discarded because of
a CRC error. This counter is updated, if needed, regardless of the Receive
Unit state. The Receive CRC Errors counter is mutually exclusive of the
Receive Alignment Errors and Receive Short Frame Errors counters.
This counter contains the number of frames that are both misaligned (for
example, CRS de-asserts on a non-octal boundary) and contain a CRC
error. The counter is updated, if needed, regardless of the Receive Unit
state. The Receive Alignment Errors counter is mutually exclusive of the
Receive CRC Errors and Receive Short Frame Errors counters.
LAN Controller Registers (B1:D8:F0)
Description
299
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