CN8237EBGB Mindspeed Technologies, CN8237EBGB Datasheet - Page 43

• 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

CN8237
ATM OC-12 ServiceSAR Plus with xBR Traffic Management
Figure 2-7. Reassembly Status Queues Related to Data Buffers and Descriptors
28237-DSH-001-C
LEGEND:
Host Memory
Buffer Descriptors
Descriptors
Linked By
(Buffer
RSM
SAR)
Associations (Pointing Function)
SAR Actions
Data Buffers
and reassembly data buffers and descriptors. The host submits free buffers to the
SAR by writing pointers to them in the free buffer queue entries. The SAR links
the buffer descriptors pointing to the three data buffers containing the
reassembled PDU, and writes the RSM status queue entry containing the pointer
to the first buffer descriptor for that PDU. The host further processes the PDU
utilizing that data.
RSM
Figure 2-7
Mindspeed Technologies
RSM Status Queues
illustrates the association between the reassembly status queues
Host Write Free
Buffer Queue
2.2 High Performance Host Architecture with Buffer Isolation
Entry
PCI
™
SAR Writes
RSM Status Queue
Entry
Free Buffer Queues
2.0 Architecture Overview
RSM Memory
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