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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.
11
Cell rate policing is supported through two instances of the Generic Cell Rate
Algorithm (GCRA) for each connection. Each cell that violates the traffic contract
can be tagged (CLP bit set high) or discarded. To allow full flexibility, each GCRA
instance can be programmed to police any combination of user cells, OAM cells,
Resource Management, high priority cells or low priority cells.
The RCMP-200 supports multicasting. A single received cell can result in an
arbitrary number of cells presented on the Output Cell Interface, each with its
own unique VPI/VCI value and appended bytes. The ATM cell payload is
duplicated without modification.
The Output Cell Interface can be connected to the switch core through an
extended cell format SCI-PHY compatible bus. Cells are stored in a four cell
deep FIFO until the downstream devices are ready to accept them. The details
of how cells are handled in this FIFO depends on the particular application of the
RCMP-200 and are presented in "Operational Modes" section.
The Microprocessor Interface is provided for device configuration, control and
monitoring by an external microprocessor. This interface provides access to the
external SRAM to allow creation of the data structure, configuration of individual
connections and monitoring of the connections. The Microprocessor Cell Buffer
gives access to the cell stream, either directly or through intervention by a DMA
controller. Programmed cell types can be routed to a microprocessor readable
sixteen cell FIFO. The microprocessor can send cells over the Output Cell
Interface.
The RCMP-200 is implemented in low power, 0.6 micron, +5 Volt CMOS
technology. It has TTL compatible inputs and outputs and is packaged in a 240
pin copper slugged plastic QFP package.