CN8237EBGB Mindspeed Technologies, CN8237EBGB Datasheet - Page 72

• 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

3.0 Host Interface
3.2 Multiple Client Architecture
Figure 3-1. Client/Server Model of the CN8237
3.2.1 Logical Clients
3-2
Motherboard
PCI Cards
PCI
(Up to 32
Physical
Physical
Logical
Clients)
Logical
Client
Client
Client
Client
3.2 Multiple Client Architecture
The CN8237 provides multiple independent control and status communication
paths. Each communication path, or flow, consists of a control queue and a status
queue for both segmentation and reassembly. The host assigns each of these
independent flows to system clients or peers. As throughput requirements
escalate, the host system can add processing power in the form of additional
peers. This degree of freedom creates a scalable host environment. The CN8237
provides an ATM server for up to 32 clients.
client/server relationship.
As shown in
host can also assign control and status queues to system software tasks or logical
clients. Since the queues offer individually distinct communication paths, each
logical client interfaces to the CN8237 independently. Due to its server
architecture, the CN8237 supplies the synchronization between asynchronous
tasks requiring ATM services.
Mindspeed Technologies
Figure
3-1, the clients need not be physically distinct PCI peers. The
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
LEGEND:
CN8237 Subsystem
Interface
™
PCI
Figure 3-1
ATM Server
Host Data Path
Host Control/Status Flow
illustrates this
28237-DSH-001-C
ATM
User-Network
Interface
CN8237
8237_024