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參數(shù)資料
| 型號(hào)： | PM7323 |
| 廠商： | PMC-SIERRA INC |
| 元件分類： | 數(shù)字傳輸電路 |
| 英文描述： | ROUTING CONTROL, MONITORING, & POLICING 200 MBPS |
| 中文描述： | ATM/SONET/SDH SUPPORT CIRCUIT, PQFP240 |
| 封裝： | PLASTIC, QFP-240 |
| 文件頁(yè)數(shù)： | 43/219頁(yè) |
| 文件大?。?/td> | 695K |
| 代理商： | PM7323 |
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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.
32
9
FUNCTIONAL DESCRIPTION
The RCMP-200 receives cells from up to 32 PHY devices, processes them, and
passes them to a single switch port or queue manager. The RCMP-200 device
operates as a multi-PHY master on its input side. Round-robin polling selects
between the PHY devices based on the availability of cells.
The Output Cell Interface operates as a single-PHY slave. The RCMP-200
informs the bus master if it has a cell available for transfer out by asserting OCA,
and waits for the bus master to assert the ORDENB signal to effect the transfer.
If the output buffer becomes full, the RCMP-200 will apply back-pressure to all its
input PHYs.
Logical multicasting is possible, although the system design must take into
account the fact that the input PHYs may be backed-up as a result - with possible
cell loss occurring.
9.1
Input Buffering
Cells received on the extended cell format SCI-PHY compatible Input Cell
Interface are buffered in a 4 cell deep FIFO. The input buffer provides for the
separation of internal timing from asynchronous external devices.
The SCI-PHY cell interface operates at clock rates up to 25 MHz and supports 8
bit wide data structures with programmable lengths. The data structure contains
a 52 (HEC excluded) or 53 byte ATM cell and up to 10 appended bytes. The
start of the data structure is indicated by the ISOC input. Refer to the
"Operation" section for more detail on this data structure. The data bus is
protected by the IPRTY input. The parity can be configured to be odd or even.
The input FIFO filters all unassigned cells and cells reserved for the use of the
Physical Layer. Unassigned cells are identified by an all zero VPI/VCI value and
CLP=0. They are filtered without notification. Physical layer cells are identified
by an all zero VPI/VCI value and CLP=1. They are filtered with a resulting
maskable interrupt indication and a Physical Layer cell count increment. By
default, the cell coding is assumed to be for a Network-Network Interface (NNI);
therefore the VPI is taken to be twelve bits. If one of the PHY links is a User-
Network Interface (UNI) and the GFC field is non-zero, the cell will not be filtered
by the Input Cell Interface, but will be discarded by the VC Identification circuit.
As an option, all cells can be interpreted as UNI cells.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PM7323-SI | ROUTING CONTROL, MONITORING, & POLICING 200 MBPS |
| PM7324 | SATURN User Network Interface ATM Layer Solution |
| PM7324-BI | S/UNI-ATM LAYER SOLUTION |
| PM7325 | S/UNI-ATLAS-3200 Telecom Standard Product Data Sheet Preliminary |
| PM7325-TC | S/UNI-ATLAS-3200 Telecom Standard Product Data Sheet Preliminary |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PM7323-SI | 制造商:PMC 制造商全稱:PMC 功能描述:ROUTING CONTROL, MONITORING, & POLICING 200 MBPS |
| PM7324 | 制造商:PMC 制造商全稱:PMC 功能描述:S/UNI-ATM LAYER SOLUTION |
| PM7324BI | 制造商:PMC-Sierra 功能描述: |
| PM7324-BI | 制造商:PMC 制造商全稱:PMC 功能描述:S/UNI-ATM LAYER SOLUTION |
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