CN8237EBGB Mindspeed Technologies, CN8237EBGB Datasheet - Page 164

• Manufacturer Part Number: CN8237EBGB
• Description: ATM SAR 622Mbps 3.3V ABR/CBR/GFR/UBR/VBR 456-Pin BGA
• Manufacturer: Mindspeed Technologies

Specifications of CN8237EBGB

• Package: 456BGA
• Traffic Class: ABR|CBR|GFR|UBR|VBR
• Utopia Type: Level 1|Level 2
• Host Interface: PCI
• Maximum Data Rate: 622 Mbps
• Typical Operating Supply Voltage: 3.3 V
• Minimum Operating Supply Voltage: 3.135 V

6.0 Traffic Management
6.2 xBR Cell Scheduler Functional Description
Figure 6-3. Schedule Table with Size = 100
6-8
Scheduler Wraps Back
to 00 at End of Table
00
10
20
30
40
50
60
70
80
90
Cell Schedule
Starts @
Schedule Slot 00
01
11
21
31
41
51
61
71
81
91
02
12
22
32
42
52
62
72
82
92
system designer has chosen 100 schedule slots. The duration of each slot is a
programmable number of clock cycles. The system designer can choose to
schedule cells close to the full payload data rate of STS-12C at 1.4128 M
cells/second. At this cell rate, each cell slot takes 47 clocks with a clock frequency
of 66 MHz. The scheduler begins at slot 00 and increments its position in the table
every 47 clocks. After 4700 clocks, the scheduler position returns to 00.
Figure 6-3
03
13
23
33
43
53
63
73
83
93
SCHEDULE TABLE
Mindspeed Technologies
04
14
24
34
44
54
64
74
84
94
represents an example of a schedule table. In this example, the
Scheduler Postion
05
15
25
35
45
55
65
75
85
95
Current Cell
06
16
26
36
46
56
66
76
86
96
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
07
17
27
37
47
57
67
77
87
97
Increments Postition by One Entry Each SLOT_PER
08
18
28
38
48
58
68
78
88
98
™
09
19
29
39
49
59
69
79
89
99
SCHEDULE SLOT
29
Assigned
VCC_INDEX(es)
28237-DSH-001-C
SLOT INDEX
}
CN8237
One to
Eight
Words
8237_058