L-ET4148-50C-DB LSI, L-ET4148-50C-DB Datasheet - Page 181

• 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_Queue_Status
Description: Provides a queue status overview.
Table 243. Packet_Buffer_Queue_Status Register Parameters
Table 244. Packet_Buffer_Queue_Status Field Parameters
Each record of this register corresponds to one of the system's 52 transmit ports (50 Ethernet ports and 2 supervi-
sor ports). Within queue_not_empty[7:0], the left-most bit corresponds to queue priority 7 (highest priority),
while the right-most bit corresponds to queue priority 0 (lowest priority). When one of queues is not empty, its cor-
responding bit is asserted. When the queue is empty, its corresponding status bit is deasserted.
Note: For revision C, the 10 Gbits/s Ethernet queues are spread across two entries in this table. XG0 is at refer-
Base Address
Register Size (revisions B and B1)
Register Size (revision C)
Register Instances
Register Spacing
Record Size
Record Instances (revisions B and B1)
Record Instances (revision C)
Record Spacing
queue_not_empty[7:0]
ences 50 and 52, while XG1 appears at references 51 and 53.
0
Field Name
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9
0
1
Parameter
2
REFERENCE
REFERENCE
3
4
PORT
PORT
Figure 174. Packet_Buffer_Queue_Status Register Diagram
5
6
XG1
51
REVISIONS B AND B1 PORT NUMBERING SCHEME (TABLE INDEXING)
Instances = 1
Offset = 0.24
Parameters
Mode = RO
XG1
7
Single-Chip 48 x 1 Gbit/s + 2 x 10 Gbits/s Layer 2+ Ethernet Switch
(continued)
53
XG0
50
8
REVISION C PORT NUMBERING SCHEME (TABLE INDEXING)
XG0
52
Figure 175. Port Numbering Schemes
9
SU1
49
XG1
51
10
Agere Systems - Proprietary
SU0
48
11
XG0
50
12
Bits are asserted to indicate that the corresponding queue is not
empty.
G47
SU1
47
49
G = 10/100/1000 Mbits/s PORT
13
SU0
XG = 10 Gbits/s PORT
G46
48
SU = SUPERVISOR
0x000c_ba00
46
14
G47
15
47
Value
G45
45
208
216
NA
52
54
1
4
4
16
G46
46
G44
17
44
G45
45
18
G44
19
44
20
21
Description
22
G3
3
G3
3
23
8
G2
2
G2
24
2
7
G1
25
1
6
G1
1
26
5
G0
0
G0
27
4
0
28
3
29
2
ET4148-50
30
1
31
0
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