RS8234EBGC Mindspeed Technologies, RS8234EBGC Datasheet - Page 223
RS8234EBGC
Manufacturer Part Number
RS8234EBGC
Description
RS8234EBGC ATM XBR SAR
Manufacturer
Mindspeed Technologies
Datasheet
1.RS8234EBGC.pdf
(401 pages)
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RS8234
ATM ServiceSAR Plus with xBR Traffic Management
7.3.1 Key OAM-Related Fields for OAM Reassembly
28234-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 RS8234 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, as well as ABR channels.
The 3-bit OAM field in the RSM status queue entry should be set to the value
indicated in the RSM status queue structure description for that field. A non-zero
value in the OAM field indicates that the cell is an OAM cell.
error, the RS8234 will set 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 RS8234 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 RS8234 provides global OAM buffer and status queues (OAM_BFR_QU
If the CRC-10 error detection code computation on the OAM cell shows an
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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