![](http://datasheet.mmic.net.cn/330000/PM7323_datasheet_16444372/PM7323_61.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.
50
on and the status bits are cleared.
Note: If AAL5 packet policing is to be
used, only one GCRA may police the cell stream. The other GCRA must
have its increment field set to 0x00000.
OAM and Resource Management (RM) cells are passed transparently by the
packet discard mechanism.
The CLP=0, CLP=1 and non-compliant cell counts are updated for all cells of an
AAL5 packet.
9.3.5 Cell Counting
The RCMP-200 maintains counts on a per VC basis and over the aggregate cell
stream.
The following parameters are stored on a per VC basis:
number of low priority cells
number of high priority cells
non-compliant cell counts (user programmable)
The number of cells discarded by the policing function and the number of cell
reduced from high to low priority can be derived from the above counts , the
state of the Action1[1:0] and Action2[1:0] fields, and the state of the NCOMP[1:0]
register bits.
In order to maintain accurate non-compliant cell counts in the VC table, the
RCMP-200 asserts a maskable interrupt whenever the most significant bit is set
for either of the non-compliant cell counts. This allows an external
microprocessor to read the counts to prevent saturation.
The low and high priority cell counts represent the state of the cells before
policing. The non-compliant cell counts can be used to derive the cell counts
after policing.
To provide the ability to provision scheduled measurements and special studies,
each VC can be programmed to count either user information cells, OAM
(including Resource Management) cells or both.