CN8237EBGB Mindspeed Technologies, CN8237EBGB Datasheet - Page 116
CN8237EBGB
Manufacturer Part Number
CN8237EBGB
Description
ATM SAR 622Mbps 3.3V ABR/CBR/GFR/UBR/VBR 456-Pin BGA
Manufacturer
Mindspeed Technologies
Datasheet
1.CN8237EBGB.pdf
(415 pages)
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
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5.0 Reassembly Coprocessor
5.3 CPCS-PDU Processing
Figure 5-6. CPCS-PDU Reassembly
5-8
CPCS-PDU
(For a
Specific VCC)
ATM Cells
(Hdr)
BOM Cell
(Payload)
in ANSI T1.635 or reassembly into a transparent AAL0 PDU. The exact process
is governed by the AAL type described in detail in the subsections below.
SETUP
Each active reassembly VCC must have a corresponding entry in the reassembly
VCC table to describe its state. At channel setup time—either during system
initialization for Permanent Virtual Connections (PVCs), or dynamically for
Switched Virtual Connections (SVCs)—the host allocates a reassembly VCC
table entry and configures the VCC according to its provisioned or negotiated
characteristics. This includes the AAL in use, its assigned buffer pools and
allocation priority, as well as the associated segmentation VCC index
(SEG_VCC_INDEX) for full duplex connections.
OPERATION
Once the reassembly process is activated, this RSM VCC table entry will be used
to track the current state of the connection and direct the CN8237 to perform
specific functions as described throughout this chapter.
Figure 5-6
Mindspeed Technologies
illustrates the basic process function.
(Hdr)
COM Cells . . .
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
(Payload)
™
. . .
. . .
(Hdr)
EOM Cell
(Payload)
28237-DSH-001-C
CN8237
8237_043
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