PM7323 datasheet(45/219 Pages) PMC

45 / 219 page

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.

Figure 3

- VC Search Key Composition

Field A

Field B

VPI/VCI

S - L

length <= 128 bits

Cell Prepend

Cell Postpend

Cell Header

Field A

Field B VPI/VCI

VC Search Key

PHY

Primary Key

Secondary Key

43 (UNI)

(NNI)

HEC UDF

Routing Word

The RCMP-200 divides the VC Search Key into two search keys - the Primary

Search Key and the Secondary Search Key. The Primary Key is 0 to 16 bits long.

It is constructed from two fields - the

PHY ID and Field A. The PHY ID field and

Field A can be programmed to be 0-5 bits and 0-16 bits long, respectively. The

PHY ID is the SCI-PHY address and must, therefore, include sufficient bits to

encode all the PHYs at the PHY Layer interface of the RCMP-200. Field A starts

at location SA of the Routing Word and has length LA. The number of bits in

Field A plus the number in the PHY ID field must be less than or equal to 16.

The Secondary Search Key is 39 bits long and is composed of two fields. The

first field,

Field B, is 0 to 11 bits long and may start anywhere in the routing

word. Field B parameters include starting position SB, and length LB. The second

field is the 28 bit VCI/VPI. This field is always taken from the cell's header.

PM7323 Datasheet(PDF) 45 Page - PMC-Sierra, Inc

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