![](http://datasheet.mmic.net.cn/330000/PM7323_datasheet_16444372/PM7323_175.png)
STANDARD PRODUCT
PM7323 RCMP-200
DATASHEET
PMC-960543
ISSUE 2
ROUTING CONTROL, MONITORING, & POLICING
200 MBPS
Proprietary and Confidential to PMC-Sierra, Inc.
and for its Customer’s Internal Use.
164
Backward Reporting Performance Management:
0010
0001
000000
CRC-10
Unused
6AH
(42 oct.)
Block Error Lost/Misdelivered
Result
(1 oct.)
Cell Count
(2 octets)
The Block Error Result contains the BIPV for the forward monitoring cell
received. If the BIPV is undefined, which occurs when the MSN is not expected
or the Total User Cell Difference (TUCD) is non-zero, the Block Error Result is
coded as all ones. The Lost/Misdelivered Cell Count is coded with the absolute
value of the TUCD in the 15 least significant bits and a one in the most significant
bit position if TUCD is negative (i.e. cells have been lost.) Misinserted cells result
in a zero in the most significant bit position.
The RCMP-200 does not generate combined Monitoring/Reporting cells.
The RCMP-200 does not automatically generate Activation/Deactivation and
Loopback cells. These can be inserted through the Microprocessor Cell
Interface. The microprocessor is responsible for coding all fields except the
CRC-10.
All generated OAM cells contain a correct Error Detection Code (EDC).
12.4 VC Identification Search Algorithm
Within the constraints imposed by the Primary and Secondary Search Table
coding rules, numerous search algorithms are supported. The building of a
search data structure is a software function and is normally performed by the
supervising microcontroller. A shadow data structure is required by the
microcontroller to enact the modifications to the data structure. (It is possible to
avoid using a shadow data structure, but efficiency is reduced by the need to
perform searches through multiple SRAM accesses via the RCMP-200, each
taking up to 1600ns. Also, diagnostic possibilities are reduced.)