CN8236EBGB Mindspeed Technologies, CN8236EBGB Datasheet - Page 239
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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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CN8236
ATM ServiceSAR Plus with xBR Traffic Management
7.3.1 Key OAM-Related Fields for OAM Reassembly
28236-DSH-001-B
7.3.1.1 Reassembly
7.3.1.2 Reassembly
7.3.1.3 F4 Flow
VCC State Table
Status Queue
7.3 Reassembly of OAM Cells
To enable the reassembly coprocessor to detect and therefore further process
OAM cells, set the OAM_EN bit in RSM_CTRL1 to a logic high.
and OAM_STAT_QU, addresses for both assigned in the RSM_CTRL1 register).
To activate these queues, set the OAM_QU_EN bit in the RSM_CTRL1 register
to a logic high. The CN8236 then routes OAM traffic to these global buffer and
status queues.
NOTE:
The reassembly VCC State table field, SEG_VCC_INDEX, should be written to
point to the channel index of the corresponding segmentation channel. This is
necessary for PM-OAM and ABR channels.
The 3-bit OAM field in the RSM status queue entry must be set to the value
indicated in the RSM status queue structure description for that field. A non-0
value in the OAM field indicates that the cell is an OAM cell.
the CN8236 sets the CRC_ERROR bit in the status queue entry to a logic high.
For F4 flow operation, a separate VCC table entry must be configured.
The CN8236 detects the following OAM cell flows:
• Segment F4 Flow
• End-to-end F4 Flow
• Segment F5 Flow
• End-to-end F5 Flow
• PTI = 6
• PTI = 7
The CN8236 provides global OAM buffer and status queues (OAM_BFR_QU
If the CRC-10 error detection code computation on the OAM cell shows an error,
The cell buffer size must be large enough to hold a complete cell, when
OAM detection is enabled.
Mindspeed Technologies
™
7.3 Reassembly of OAM Cells
7.0 OAM Functions
7-9
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