L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 255

• Manufacturer Part Number: L-ET4148-50C-DB
• Manufacturer: LSI

Specifications of L-ET4148-50C-DB

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Preliminary Data Sheet
April 2006
Agere Systems Inc.
Appendix A: Registers
Tx_Total_Collisions
Description: Statistics counters.
Table 356. Tx_Total_Collisions Register Parameters
Table 357. Tx_Total_Collisions Field Parameters
Statistics counters roll over from their maximum count to zero without warning or indication that a rollover has
occurred. It is expected that the supervisor sample these counters often and to use the delta from a previous sam-
ple to the current sample to determine the overall count delta. If the current sample has a smaller value than the
previous sample (indicating a rollover), then 2
the delta to determine the actual delta. All statistics counters’ widths are scaled to allow for sampling by the super-
visor ten times per second without risk of missing a rollover event.
Base Address
Register Size
Register Instances
Register Spacing
Record Size
Record Instances
Record Spacing
tx_total_collisions[15:0]
0
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
0
Parameter
1
Field Name
2
3
4
5
REFERENCE
6
7
Figure 268. Tx_Total_Collisions Register Diagram
PORT
Single-Chip 48 x 1 Gbit/s + 2 x 10 Gbits/s Layer 2+ Ethernet Switch
(continued)
8
9
XG1
Figure 269. Port Numbering Scheme
49
0x0004_5400
10
Agere Systems - Proprietary
Instances = 50
Spacing = 4.0
XG0
Offset = 0.16
Mode = R/W
Parameters
48
11
Value
200
200
NA
NA
1
1
n
12
G47
47
(where n is the number of bits in the statistics counter) is added to
PORT NUMBERING SCHEME
G = 10/100/1000 Mbits/s PORT
XG = 10 Gbits/s PORT
SU = SUPERVISOR
13
G46
46
14
15
G45
45
16
G44
44
17
A count of the total number of collisions experi-
enced by all packets
18
19
20
tx_total_collisions[15:0]
21
G3
3
22
G2
2
23
8
Description
24
G1
7
1
25
6
G0
0
26
5
27
4
28
3
29
2
ET4148-50
30
1
31
0
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