L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 185

• 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
Packet_Buffer_Shaper_Accumulator_Odd
Description: Up/down accumulators used for traffic shaping.
Table 251. Packet_Buffer_Shaper_Accumulator_Odd Register Parameters
Table 252. Packet_Buffer_Shaper_Accumulator_Odd Field Parameters
The shaper accumulators are used to determine when a particular queue may have one of its packet’s scheduled
for retrieval and transmission. A queue is considered eligible for scheduling when its corresponding
shaper_accumulator[15:4] value is greater than zero.
There is one shaper_accumulator[15:4] value per queue.
The byte count of a transmitted packet is subtracted from its queue’s associated shaper_accumulator[15:4]
value. Shaper credits are periodically added to shaper_accumulator[15:4].
REFERENCE
Base Address
Register Size
Register Instances
Register Spacing
Record Size
Record Instances
Record Spacing
shaper_accumulator_sign
shaper_accumulator[15:4]
QUEUE
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
SU7
1
407
Field Name
SU6
2
406
Parameter
3
Figure 181. Packet_Buffer_Shaper_Accumulator_Odd Register Diagram
4
SU1
401
5
SU0
400
6
399
7
Single-Chip 48 x 1 Gbit/s + 2 x 10 Gbits/s Layer 2+ Ethernet Switch
(continued)
8
XG1
...
Figure 182. Queue Numbering Scheme
9
392
10
Agere Systems - Proprietary
391
Instances = 1
Instances = 1
Offset = 0.15
Offset = 0.16
QUEUE NUMBERING SCHEME
Mode = R/W
Mode = R/W
Parameters
11
XG0
...
G = 10/100/1000 Mbits/s PORT
XG = 10 Gbits/s PORT
SU = SUPERVISOR
12
384
13
383
14
0x000c_ac00
15
G47
...
Value
816
204
NA
16
1
4
4
376
The sign of the two’s complement
shaper_accumulator[15:4] value. When
asserted, this signal indicates that
shaper_accumulator[15:4] is negative.
The current value of a traffic shaper accumulator.
This counter does not count below its negative min-
imum or above its positive maximum.
17
18
shaper_accumulator[15:4]
19
20
15
21
G1
...
22
8
Description
23
8
7
24
7
G0
...
25
6
0
26
5
27
4
28
3
0
ET4148-50
29
2
0
30
1
0
31
0
0
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