CN8237EBGB Mindspeed Technologies, CN8237EBGB Datasheet - Page 160

• 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
6.1 CN8237 Overview
Figure 6-1. Non-ABR Cell Scheduling
6-4
System
Clock
Cell Scheduler
Parameters
and Priority
Schedule
Per-VCC
Dynamic
Table
xBR
flow for CBR, VBR, GFR, and UBR traffic. The Cell Scheduler tracks cell slots
using the system clock and decides which VCC should send during each slot.
This decision is based upon per-VCC parameters and the current condition of the
Dynamic Schedule table. Unlike ABR, these service categories are open loop,
and need no feedback from the network for run-time cell scheduling.
Figure 6-1
Mindspeed Technologies
VCC_INDEX
shows a high-level block diagram of the Cell Scheduler control
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
Segmentation
Coprocessor
™
CBR
UBR
GFR
VBR
Network
ATM
28237-DSH-001-C
CN8237
8237_056