CN8236EBGB Mindspeed Technologies, CN8236EBGB Datasheet - Page 38
CN8236EBGB
Manufacturer Part Number
CN8236EBGB
Description
ATM SAR 155Mbps 3.3V ABR/CBR/GFR/UBR/VBR 388-Pin BGA
Manufacturer
Mindspeed Technologies
Datasheet
1.CN8236EBGB.pdf
(443 pages)
Specifications of CN8236EBGB
Package
388BGA
Traffic Class
ABR|CBR|GFR|UBR|VBR
Utopia Type
Level 1|Level 2
Host Interface
PCI
Maximum Data Rate
155 Mbps
Typical Operating Supply Voltage
3.3 V
Minimum Operating Supply Voltage
3 V
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2.0 Architecture Overview
2.2 High Performance Host Architecture with Buffer Isolation
Figure 2-2. CN8236 Queue Architecture
2-4
(1) Status queues may be optionally placed in SAR-shared memory.
NOTE(S):
Segmentation Function
Reassembly Function
Status Queues
Segmentation
Global OAM
Global OAM
(32)
Host Memory Area
SEG Status Queue
RSM Status Queue
Status Queues
Reassembly
location and availability to the free buffer queues, one of which can be designated
as the Global OAM free buffer queue. The reassembly coprocessor uses the free
buffer queue entries to allocate data buffers for received ATM cells during
reassembly.
One of these can be designated as the Global OAM segmentation status queue.
The host further processes these segmentation status queue entries.
of these can be designated as the Global OAM reassembly status queue. The host
further processes these reassembly status queue entries.
(1)
The host furnishes data buffers to the reassembly processor by posting their
The following queues exist in host (or optionally, SAR-shared) memory:
• segmentation status queues (up to 32 queues)—includes the Global OAM
• reassembly status queues (up to 32 queues)—includes the Global OAM
The CN8236 reports segmentation status to the segmentation status queues.
The CN8236 reports reassembly status to the reassembly status queues. One
segmentation status queue
reassembly status queue
Mindspeed Technologies
CN8236
ATM ServiceSAR Plus with xBR Traffic Management
RSM/SEG Queue
Segmentation Function
Reassembly Function
™
Global OAM
SAR-Shared Memory Area
Transmit Queues
Free Buffer Queues
Free Buffer Queue
(32)
28236-DSH-001-B
(32)
CN8236
8236_096
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